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Luftfahrtgeschichte: Bibliography of Aeronautics 1925 von Paul Brockett

» Übersicht zur Literatur der Luftfahrtgeschichte

Bibliography of Aeronautics
Die umfangreiche und international angelegte Bibliographie zur Luftfahrtgeschichte, die unter dem Titel "Bibliography of Aeronautics" vom US-amerikanischen Autor Paul Brockett verfaßt und über die Smithsonian Institution ("Smithsonian") herausgegeben bzw. über die Smithsonian Institution Libraries veröffentlicht wurde, umfaßt im achten Band eine Bestandsaufnahme der internationalen Luftfahrtliteratur im Jahre 1925.

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BIBLIOGRAPHY OF AERONAUTICS

1925

NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS

united states government printing office washington 1928

INTRODUCTION

This work covers the literature published from January 1 to December 31, 1925, and continues the work of the Smithsonian Institution issued as volume 55 of the Smithsonian Miscellaneous Collections, which covered the material published prior to June 30, 1909, and the work of the National Advisory Committee for Aeronautics as published in the Bibliography of Aeronautics for the years 1909 to 1916, 1917 to 1919, 1920 to 1921, 1922, 1923, and 1924.

As in the previous volumes, citations of the publications of all nations have been included in the languages in which these publications originally appeared. The arrangement is in dictionary form with author and subject entry and one alphabetical arrangement. Detail in the matter of subject reference has been omitted on account of the cost of presentation, but an attempt has been made to give sufficient cross-references to facilitate research in special lines.

Joseph S. Ames, Chairman, National Advisory Committee for Aeronautics.

March 20, 1928.

in

ABBREVIATIONS

Aer. Eng. Suppl. The Aeroplane________ The Aeroplane—. . . Aeronautical Engineering Supplement to The Aeroplane, London.

Aeron, Journ_________________________ Aeronautical Journal, London.

Amer. Mach_________________________ American Machinist, New York.

Amer. Gas. Eng. Journ ______________ American Gas Engineering Journal,

New York.

Atti Assoc. Ital. Aerotecn____________Atti dell' Associazione Italiana di Aero-

technica, Roma.

Aut. Eng___________________________ Automotive Engineering, New York.

Aut. Mot. Flugw__________________Automobil-Motorrad-Flugwesen, Berlin.

Ann. Soc. Met. France________________ Annuaire, Société Météorologique de

France, Paris.

Automobile-Automotive Ind__________ The Automobile and Automotive Industries, New York.

Aviat. Aer. Eng______________________ Aviation and Aeronautical Engineering,

New York.

Bull. Aero-Club Suisse________________ The Bulletin, Aero Club Suisse, Berne.

Bull. Exper. Depart. Airplane Eng. The Bulletin of the Experimental De« Div. partment, Airplane Engineering Divi-

sion, U. S. A., Dayton, Ohio.

Bull. Soc. Enc. Ind. Nat ____________ Bulletin de la Société d'Encouragement

pour l'Industrie Nationale, Paris.

C. R. Acad. Sei_____________________ Comptes Rendus hebdomadaires des

Séances de l'Académie des Sciences, Paris.

Deutsche Luftf. Zeitschr_____________Deutsche Luftfahrer Zeitschrift, Berlin.

Electr. Railw. Jour___________________ Electric Railway Journal, New York.

Journ. Amer. Soc. Mech. Eng_________Journal of the American Society of Mechanical Engineers, New York.

Journ. Amer. Water Works Ass'n______ Journal of the American Water Works

Association, Baltimore.

Journ. Inst. Electrical Engineers______Journal of the Institute of Electrical

Engineers, New York.

Journ. Frankl. Inst__________________Journal of the Franklin Institute,

Philadelphia.

Journ. Mil. Serv. Inst________________Journal of the Military Service Institution, Governors Island, New York.

Journ. Roy. Aer. Soc__________________ Journal of the Royal Aeronautical Society, London.

Journ. Roy. Soc. Arts________________ Journal of the Royal Society of Arts,

London.

Journ. Soc. Automotive Engineers_____ Journal of the Society of Automotive

Engineers, New York.

Journ. Soc. Mech. Eng______________Journal of the Society of Mechanical

Engineers, Tokyo.

Journ. United States Art_____________ Journal of the United States Artillery;

Fortress Monroe, Va. La Conq. l'Air______________________La Conquête de l'Air, Brussels.

Le Techn. Aéron____________________ La Technicque Aéronautique, Paris.

Pop. Mech__________________________ Popular Mechanics, Chicago.

Pop. Sci. Monthly___________________ Popular Science Monthly, New York.

Proc. Amer. Inst. Blectr. Eng_________ Proceedings of the American Society of

Electrical Engineers, New York.

Proc. U. S. Naval Inst_______________ Proceedings of the United States Naval

Institute, Annapolis, Md.

Quart. Journ. Roy. Met. Soc__________ Quarterly Journal of the Royal Meteorological Society, London.

Rend. Instituto Sper. Aer_____________ Rendiconte dell' Istituto Sperimentale

Aeronautico, Roma.

Rend. Teen. Dir. Sup. Genio. Costr. Commissariato dell' Aeronautica. In-Aeron. tendenza Generate. Rendiconti Tec-

nici della Direzione Superiore del Genio e delle Costruzioni Aeronautiche. Roma.

Rév. Gén. Seien_____________________ Révue Genérale Scientifique, Paris.

Riv. Ital. Aeron_____________________ Rivista Italiana Aeronautica, Roma.

Seient. Amer________________________ Scientific American, New York.

Techn. Berichte______________________ Technische Berichte, Charlottenburg.

Tech. Rept. Advis. Com. Aeronautics.. Technical Report of the Advisory Committee on Aeronautics, London.

Zeitschr. Plugt. Mot_________________Zeitschrift fur Flugtechnik und Motorluftschifffahrt, München.

Zeit. Österr. Ing. Arch. Ver____________ Zeitschrift des Oesterreichischen Inge-

nieuer- und Architekten - Vereines, Wien.

Zeitschr. Ver. deutsch. Ing___________Zeitschrift des Vereines deutscher Ingenieure, Berlin.

BIBLIOGRAPHY OF AERONAUTICS

1925

By PAUL BROCKETT

BIBLIOGRAPHY OF AERONAUTICS, 1925

By Paul Bkockett

A

A. D. 1. See Bradfield, F. B., and A. S. Hartshorn: Test of three aerofoils suitable for high speed. A. D. 1, Sloane, and R. A. F. 26.

A. G. L'aviation sanitaire au Val-de-Grâoe et au Bourget

l'aérophile, 33e année, nos. 9-10 (ler-15 mai 1925), paris, pp. 132-134, ill.

- Une exposition d'aviation sanitaire.

l'aérophile, 33e année, nos. 7-8 (ler-15 avril 1925), paris, p. 111.

AbebIvEN, van den. De Amerikaansohe luohtpostdienst.

het vliegveld, 9de jaarg., no. s (aug. 1925), amsterdam, pp. 211-213,map.

- De Engelsche luohtvaartbegrooting.

het vliegveld, 9de jaarg., no. 4 (april 1925), amsterdam, pp. 104-105.

- Een nieuwe positieregeling voor militaire vliegers.

het vliegveld, 9de jaarg., no. 2 (feb. 1925), amsterdam, pp. 49-50. Aberceon. Die Deutsche Verkehrsausstellung. Raum 7. Freiballon.

zeitschr. flugt. mot., 18. jahrg., 17. u. 18. helt (9. sept. 1925), münchen, pp. 357-358, ill.

Abrial, Georges. Note sur les essais comparatifs, effectués en vol et au tunnel, avec le planeur Abrial "Vautour."

l'aérotechnique (l'aéronautique, 7me année, no. 77), 3me année, num. 34 (oct. 1925), paris, pp. 377-380, ul.

Acceleration. See Doolittle, J. H.: Accelerations in flight.

AccELEROMETERS. See Meredith, F. W.: Determination of lift and drag coefficients during a stall by. means of accelerometers.

Accessories. Les accessoires d'aéronautique au dernier Salon.

l'aérotechnlçiue (l'aéronautique, 7me année. no. 69), 3me année, num. 26 (lév. 1925), paris, pp. 68-64, ill.

Accidents. Accidents.

aeronautics. techn. eep. aer. res. com., 1923-24, vol. 1, london, 1925, pp. 40-42.

- Hazards of the air.

independent, vol. 115 (sept. 19, 1926), new york, pp. 315-316, 111.

- Lessons from a tragedy.

scientific american, vol. 131 (dec. 1924), new york, p. 388.

- On making the most of accidents.

the aeroplane, vol. 28, no. 2 (jan. 14, 1925), london, p. 30.

- See Croydon: The Croydon accident. Official report.

- See Page, Frederick Handley: Prevention of accidents in commercial

aviation.

- See Seilkopf, Heinrich: Über Luftverkehrsunfalle.

- See Shenandoah: The "Shenandoah" disaster.

Ackeret, J. Air forces on airfoils moving faster than sound.

National Advisory Committee for Aeronautics, Technical Memorandums No. 317, June 1925, Washington, pp. 8, ill. From "Zeitschrift für Flugtechnik und Motoriuftschiflahrt," Fehruary 14, 1925.

--Luftkrafte auf Flügel, die mit grösserer als Schallgeschwindigkeit bewegt

werden.

Zeitschr. Flugt. Mot., 16. Jahrg., 3. Heft (14.Feb. 1925), München, pp. 72-74, ill.

--Neuere Untersuchungen der Aerodynamischen Versuchsanstalt, Göttingen.

Vorgetragen auf der Frankfurter Tagung der WGL am 4. September 1924. Zeitschr. Flugt. Mot., 16. Jahrg., 3.Heft (14.Feb. 1925), München, pp. 44-52, ill., diagrs.

- Recent experiments at the Göttingen aerodynamic institute.

National Advisory Committee for Aeronautics, Technical Memorandums No. 323, July 1925, Washington, pp. 21, ills. From "Zeitschrift für Flugtechnik und Motoriuftschiflahrt" Feb. 14, 1925.

--Das Rotorschiff uud seine physikalischen Grundlagen. Mit einem

Vorwort von L. Prandtl.

Güttingen, Verlag Vandenhoeck & Euprecht, 1925, pp. 48, ill.

Acoustics. See Esclangon, Ernest: L'accoustique des canons et projectiles.

Adams, T. H. N. The modern flying carpet.

Slipstream, Vol. 6, No. 4 (April 1925), Dayton, Ohio, p. 8, ill.

Ader, Clement. Clément Ader and the aeroplane.

Science n. s. Vol. 61, (May 22, 1925). Garrison, N. Y., p. 533. Slipstream, Voi. 6, No. 6 (June 1925), Dayton, pp. 5-6.

- Les obsèques de Clément Ader.

L'Aôrophue, 33e année. Nos. 9-10 (ler-15 mai 1925), Paris, p. 130.

--See Dollfus, Charles: Clément Ader.

- See May, Jacques: Ader n'est plus.

Advertising^ On advertising aircraft.

The Aeroplane, Vol. 28, No. 17 (Apr. 29,1925), London, pp. 401-402.

Aéro-Club de France. Annuaire 1925, de l'Aéro-Club de France et de ses Sociétés affiliées.

Paris, Edité par l'Aéro-Club de France, 1926, pp. 80.

--Atlas des aérodromes et terrains d'atterrissage.

Paris, Aéro-Club de France, Biondel La Rongery, éditeur, 1925, etlas.

--Le grand prix de l'Aéro-Club de France pour ballons libres.

L'Aérophile, 33e année, Nos. 13-14 (ler-15 juil. 1926), Paris, pp. 195-196, ill., map.

--Le Me Congrès des Sociétés affilées à l'Aé.C. F.

L'Aérophile, 33e année, Nos. 1-2 (ler-16 jan. 1925), Paris, pp. 17-19.

Aero-Llotd. Deutscher Aero-Lloyd A.-G.

Aut. Mot. Flugw., 7.Jahrg., Nr. 13 (lS.Juli 1925), Berlin, pp. 368-359, ill., map.

Aerodromes. Aerodrome conditions and the getting-off problem. The Aeroplene, Vol. 28, No. 7 (Feb. 18, 1925), London, pp. 150, 152.

- See Rynine, N.: Graphique du travail d'un aérodrome.

Aerodynamics. Aerodynamics Subcommittee.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, p. 20.

- Playing with air shows new laws to aid aviation.

Popular Mechanics, Vol. 43, (May 1925), Chicago, pp. 723-728.

- See Ackeret, J.: Luftkräfte auf Flügel, die mit grösserer als Schallgeschwindigkeit bewegt werden.

Aerodynamics. «See Ackeret, J.: Neuere Untersuchungen der Aerodynamischen Versuchsanstalt, Göttingen.

- See Ahlboru, Fr.: Orte für die Messgaräte an Flugzeugen. Aus der

früheren hydrodynamischen Versuchsabteilung der Kgl. preuss. Flugzeug-meisterei Adlershof.

- See BairstoW, L. : Skin friction.

- See Betz, A.: Ein verfahren zur direkten Ermittlung des Profilwiderstandes.

- See Bjerknes, V.: Die hydrodynamischen Fernkrafte und deren Zusammenhang mit den Auftriebskräften von welchem die Aeroplane getragen werden.

- See Bjerknes, V.: Om aeroplaners baereevne og motstanden mot deres

vevaegelse.

- See Bjerknes, V. : Sur les forces qui portent les aéroplanes et leur relation

avec les actions hydrodynamiques à distance.

- See Blasius, H.: Uber Schwingungserscheinungen an einholmigen Unterflügeln.

- See Bouligand, G.: Une méthode approchée pour étudier le mouvement

de certains anneaux tourbillonnaires.

- See Breguet, Louis: Sur le rendement des appareils récepteurs de l'énergie

du vent.

- See Delanghe, G.: Les théories de l'aérodynamique moderne.

- See Duhamel, Rob: Étude sur les corps lacrymiformes. Formes de

moindre résistance à l'avancement.

- See Flettner, A.: Anwendung der Erkenntnisse der Aerodynamik zum

Windvortrieb von Schiffen.

- See Georgii, Walter: Die obere Negrenung der abgelenkten Luftströmung

an Hindernissen.

- , See Huguenard, E., A. Magnan et A. Planiol: Contribution à l'étude de

la structure interne du vent.

- See Irving, H. B., and A. S. Batson: On the effect of sideslip on the aerodynamic forces and moments (including those due to the controls) for a model S. E. 5A aeroplane.

- See Kayser, E.: Forschungsarbeit der Aerodynamischen Institute.

- See Koning, C. : Einige Bemerkungen über nichstationäre Strömungen an

Tragflügeln.

- See Lafay, A.: Sur le sillage des cylinders tournants.

- See Lafay, A.: Sur un moyen de modifier le sillage.

-. See Paine, George Porter: Energy, transformations in an unobstructed air

current, in an air current containing a dry obstacle, and in an air current containing an evaporating surface; with application to an aerodynamic Psychrometer and the measurement of atmospheric humidity.

- See Panetti, M.: Le caratteristiche aerodinamiche degli aeromobili in

relazione con la natura del loro esercizio.

Aerodynamics. See Panetti, M.: Nuovi progressi nella deduzione teorica delle caratteristiche aerodinamiche dei piani portanti.

- See Reyneker, F. H.: De beginselen der hydro- en aerodynamica.

- See Roy, Maurice: Le paradoxe de d'Alembert et les theories aérodynamiques.

- See Roy, Maurice: A propos de recherches théoriques sur l'aérodynamique.

■-■ See Roy, Maurice: Sur quelques questions générales d'aérodynamique.

- See Sandel: Zur Aerodynamik des Magnuseffektes.

- See Southwell, R. V.: Some recent work of the aerodynamics department

National Physical Laboratory.

- See Taylor, David Watson: Model experiments in aerodynamics.

- See Taylor, David Watson: Some aspects of the comparison of model

and full scale tests.

■- See Wings: Caratteristiche aerodinamiche di ali.

Aerofoils. See Bradfield, F. B. : On the use of a slotted trailing flap on aerofoils of various cambers.

- See Breguet, Louis: Sur le rendement des appareils récepteurs de l'energie

du vent.

- See Fage, A., and H.'L. Nixon: The prediction on the Prandtl theory of

the lift and drag for infinite span from measurements on aerofoils of finite span.

- See dauert, H.: Experimental tests of the vortex theory of aerofoils.

- See dauert, H.: The interference of wind channel walls on the aerodynamic characteristics of an aerofoil.

- See Glauert, H.: The theory of the design of aerofoils, with an analysis of

the experimental results for the aerofoils R. A. F. 25, 26, 30 to 33.

- See Le Page, W. Lawrence: Further experiments on tandem aerofoils.

- See Simmons, L. F. G., and E. Ower: Test on a large aerofoil of R. A. F.

15 section.

- See Wings.

Aerological research. See Meisinger: The Meisinger aerological research fund. Aeromarine. The Aeromarine EO sport flying boat.

Flight, Vol. 17, No. 4 (Jan. 22,1925), London, pp. 44-45, ill.

Aeronautic Safety Code. See Safety Code: Aeronautic safety code. Tentative American standard.

Aeronautical Board. See Butler, Jarvis: The United States aeronautical board.

Aeronautical Chamber of Commerce. Aircraft year book 1924.

New York, Aeronautical Chamber of Commerce of America, 1925, pp. 316, ill.

Aeronautical Research Committee. The Aeronautical Research Committee.

Nature, Vol. 116, No. 2921 (Oct. 24,1925), London, pp. 597-598.

- Aeronautical research. Technical report of the Aeronautical Research

Committee for 1923-4.

Flight, Vol. 17, No. 37 (Sept. 16, 1925), London, pp. 586-587.

Aeronautical Research Committee. Aeronautics. Technical Report of the Aeronautical Research Committee for the year 1923-24 (with appendices). Vol. I, Aerodynamics (Model and full scale). Vol. II. Scale effect, materials, compasses, engines, etc.

london, his majesty's stationery office, 1925; vol. i, pp. viii, 408, ir-rri; vol. ii, pp. vii, 409-667, ix-ixi, ills., diagrs., tabls:

--The annual report of the Aeronautical Research Committee.

the aeroplane, vol. 29, no. 10 (sept. 2,1925), london, p. 290.

- The progress of aeronautics. Fifth annual report of Aeronautical Research

Committee.

flight, vol. 17, no. 35 (aug. 27,1925), london, pp. 552-564.

- Report of the Aeronautical Research Committee for the year 1924-1925.

london, h. m. stationery offlce, 1925, pp. 44.

- Reports and Memoranda of the Aeronautical Research Committee published between April 1, 1923, and December 31, 1924.

aeronautical research committee, reports and memoranda, no. 950, april 1925, london, 1925, pp. 9.

Aeronautics. Price of progress.

outlook, vol. 141 (sept. 16, 1925), new york, pp. 73-74.

--See National Advisory Committee for Aeronautics: Aeronautics. Tenth

annual report of the National Advisory Committee for Aeronautics 1924. Including technical reports Nos. 186 to 209.

-- See National Advisory Committee for Aeronautics: Aeronautics. Eleventh annual report of the National Advisory Committee for Aeronautics, 1925. Administrative report without technical reports.

Aéronautique. See Bouche, Henri: Editor of L'Aéronautique visits United States.

Africa. Air activity in Africa. France and Belgium forging ahead.

flight, vol. 17, no. 4 (jan. 22, 1925), london, pp. 41^2, map.

- See Goys: La mission aérienne centre-Afrique.

Aqen, Myer. The Paris aero show.

aero digest, vol. 6, no. 2 (feb. 1925), new york, pp. 84, 104, ill.

Agriculture. Aerial warfare on insects up to date.

literary digest, vol. 83 (dec. 13, 1924), new york, pp. 61-62.

-- Crop surveying from airplanes.

science, n. s., vol. 61, sup. 10 (june 12, 1925), garrison, n. y.

- See Berl, C. W. : Crop protection by airplane duster.

- See Morse, Alan L.: Aeronautics and agriculture.

- See Riis, Roger William: Commercial crop dusting.

Ahlborn, Fr. Orte für die Messgeräte an Flugzeugen. Aus der früheren hydrodynamischen Versuchsabteilung der Kgl. preuss. Flugzeugmeisterei Adlershof.

zeitschr. flugt. mot., 16. jahrg., 1. heft (14. jan. 1925), münchen, pp. 2-3, ill.

Aime, Emmanuel. Le prix Alfred Leblanc.

• l'aêropbiie, 33e année, nos. 9-10 (ler-15 mal 1925), paris, pp. 143-144,111.

Air balance. See Merrill, Albert: New air balance and small wind tunnel.

Air Board. Aircraft in national defense; message from the President of the United States transmitting the report of the board appointed by the President of the United States on Sept. 12, 1925, to make a study of the best means of developing and applying aircraft in the national defense.

(69th Cong., 1st sess., S. Doc. 18.)

■Washington, Superintendent of Documents, 1925, pp. 35.

- On the American Aircraft Board.

The Aeroplane, Vol. 29, No. 16 (Oct. 14,1925), London, pp. 437-438.

- President Coolidge appoints Air Board.

Aviation, Vol. 19, No. 12 (Sept. 21, 1925), New York, pp. 354-365, 111.

- President's Air Board commences sessions.

Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, p. 386, 111.

- The President's Air Board. Nearing the end of its hearings uncovers

real sentiment of fliers.

Aviation, Vol. 19, No. 15 (Oct. 12,1925), New York, p. 501.

- President's Air Board reports.

Aviation, Vol. 19, No. 24 (Dec. 14, 1925), New York, pp. 834-837, 111.

- President's Aircraft Board reports.

National Aeronautic Association Eeview, Vol. 3, No. 12 (Dec. 1925), 'Washington, D. C, pp. 193-195.

- Report of President's Aircraft Board, November 30, 1925.

■Washington, Superintendent of Documents, 1925, pp. 5.

Aib currents. See Georgii, Walter: Die obere Negrenzung der abgelenkten Luftströmung an Hindernissen.

Air-hydrogen. See Fenning, R. W.: Air-hydrogen explosions in closed vessels.

Air jet. See Nicholas, A. J.: Photographing an air jet.

Air Ministry. Air Ministry tests for aero engines.

Engineering, Vol. 120, No. 3110 (Aug. 7, 1925), London, pp. 171-172.

- Report of Advisory Committee on Atmospheric Pollution, year ending

March 31, 1925.

Meteorological Office, Air Ministry, M. 0.280, London, H. M. Stationery Office.

Air Ministry Laboratory. Tests on improved models of aircraft compasses.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 2, London, 1925, pp. 580-593 diagrs. Reports and Memoranda, No. 868. December 1922. (M. N. 5.)

Air Navigation & Engineering Co. (Ltd.). An interesting night flying machine. The Aeroplane, Vol. 29, No. 7 (Aug. 12,1925), London, p. 220, diagr.

Air ports. See New York: New York out for a huge airport. Air raids. See Morris, Joseph: The German air raids on Great Britain 19141918.

Air service. See Bombers: Air Service asks for heavy bombers.

- See M'Darment, Corley: What we could do in the air if we had to.

- See Mitchell, William: General Mitchell drops some bombs.

- See United States: America's drooping wings.

Air streams. See Griffith, A. L., and A. W. Porter: On eddies formed behind apertures through which air is streaming..

Air transport. Air transport.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 1, London, 1926, pp. 46-48.

- See Civil aviation: The lessons of six years' experience in air transport.

Aircraft. The shortcomings of aircraft.

tbe aeroplane, vol. 29, no. 15 (oct. 7, 1925), london, pp. 430, 432.

Aircraft industry. Expenditures of Government with aircraft industry. aviation, vol. 18, no. 4 (jan. 26,1925), new york, pp. 98-104.

Aircraft year book. See Aeronautical Chamber of Commerce: Aircraft year book 1924.

Airdisco. Airdisco engines.

the aeroplane, vol. 28, no. 8 (feb. 25,1925), london, p. 178, ill.

Airfoils. See Ackeret, J.: Air forces on airfoils moving faster than sound.

- See Briggs, L. J., G. F. Hull, and H. L. Dryden: Aerodynamic characteristics of airfoils at high speeds.

- See Reid, Elliott G.: The effects of shielding the tips of airfoils.

- See Wings.

Airplane carriers. Another eagle's nest to confute the Navy's critics. literary digest, vol. 87 (oct. 17, 1926), new york, p. 17, ill.

- Catapulting and receiving.

scientific american, vol. 132 (feb. 1925), new york, p. 123, ill.

- Our first big plane carrier.

literary digest, vol. 85, no. 3 (apr. 18, 1925), new york, p. 11, ill.

- Power of airplane carrier to equal energy of city.

popular mechanics, vol. 43 (june 1925), chicago, p. 887.

- Speed at sea.

notion, vol. 120 (apr. 29, 1925), new york, pp. 483^84. --See Carriers.

Airplanes. Airplane with revolving wing flies vertically or level. popular mechanics, vol. 43 (apr. 1925), chicago, p. 541, ill.

- American amphibian.

scientific american, vol. 132 (apr. 1925), new york, p. 269, ill.

- New type of airplane.

literary digest, vol. 85 (june 20,1925), new york, pp. 23-24, diagr.

- Training the eyes and ears of the Army; how to make and repair airplanes.

popular mechanics, vol. 43, (mar. 1925), chicago, pp. 418-423, ill.

Airports. New York for a huge airport.

literary digest, vol. 84 (mar. 14,1925), new york, pp. 66-69, 111.

- See Landing fields.

- See Streett, St. Clair: What airports mean.

Airscrews. Aerodynamics. Air screws.

aeronautics. techn. rep. aer. res. com., 1923-24, vol. 1, london, 1925, p. 25.

- Theory of air screws.

nature, vol. 118, no. 2975 (nov. 6, 1925), london, pp. 674-675.

- See Bienen, Th.: Weiterer Beitrag zur Theorie der Luftschrauben.

- See Biondi, Luigi: I coefEcienti di spinta e di potenza per l'elica funzionante

a punto fisso e in vicinanza di esso.

- See Douglas, G. P., and R. McK. Wood: The effects of tip speed on airscrew performance.

- See Fage, A.: An analysis of the pressure distribution on a model air

screw by means of the vortex theory.

Airscrews. See Page, A.: The effect of a large boss on air-screw performance.

- See Glauert, H.: The efficiency of a tandem system of air screws.

- See Glauert, H.: Notes on the vortex theory of air screws.

—See Lock, C. N. H., and H. Bateman: Experiments with a family of air screws. Part III. Analysis of the family of air screws by means of the vortex theory and measurements of total head.

- See Lock, C. N. H., and H. Bateman: Some experiments on air screws at

zero torque, with applications to a heliocopter descending with the engine "off," and to the design of windmills.

- See Lynam, E. J. H.; Experiments with a close tandem air-screw pair.

- See Meredith, F. W.: Full-scale determination of the characteristics of a

variable-pitch air screw.

- See Pistolesi: The Pistolesi variable-pitch air screw.

- See Pistolesi, E.: Influsso di un vento laterale sul funzionamento delle

eliche.

- See Propellers.

- See Reed: Sulle eliche metalliche e in particolare la Reed.

- See Rios, L. Sante da: Elica sostentatrice ad anello.

- See Simmons, L. F. G., and F. Ower: An investigation of the influence of

downwash on the rotary derivative Mq. Part II. The effect of the airscrew slip stream.

Airship sheds. See Freyssinet: Concrete airship sheds at Orly, France. Part I. General aspect of the problem. Basic principles of the final project. Principal structural elements.

- See Freyssinet: Concrete airship sheds at Orly, France. Part II. Supporting structure and method of moving. Mechanism for moving the centering apparatus for handling the materials. Remarks on construction details.

Airships. Baby blimp is fitted up for air touring.

popular mechanics, vol. 43 (may 1925), chicago, p. 712, ill.

- British airship progress.

the aeroplane, vol. 28, no. 14 (apr. 8, 1925), london, p. 336.

- Fourteen ninety-two and nineteen twenty-four.

st. nicholas, vol. 52 (dec. 1924), new york, pp. 209-210, ill.

- Hooking an airplane to an airship.

aviation, vol. 18, no. 14 (apr. 6, 1925), new york, pp. 378-379.

- Metal-covered airship.

scientific american, vol. 132 (may 1925), new york, pp. 345-346.

- New daughters of the stars.

popular mechanics, vol. 43 (may 1925), chicago, pp. 794-799, ill.

- Pioneer passages of the Atlantic.

living age, vol. 326 (july 25, 1925), boston, pp. 200-204.

- Steel-tube airship.

scientific american, vol. 133 (oct. 1925), new york, pp. 274-276.

- Super airships.

' scientific american, vol. 132 (feh. 1925), new york, pp. 125-126.

- United States Navy plans 6,000,000 cubic foot airship.

aviation, vol. 18, no. 1 (jan. 5, 1925), new york, pp. 9-11.

Airships. See Bleisteiu, W: Effect of speed on economy of airship traffic.

- See Design: Improvements in commercial airship design.

- See Dirigibles.

- See Fairbanks, Karl J.: Pressure distribution ou the nose of an airship in

circling flight.

- See King, P. C. W. : The evolution of the airship.

- See Lewitt, E. H.: The rigid airship; a treatise on the design and performance.

- See Litchfield, P. W.: Super-Zeppelin airship.

- See Meadowcraft, Norman: Practical notes on airship construction.

- See Nobile, Umberto: Altitude of equilibrium of an airship.

- See Nobile, Umberto: The trend of airship construction in Italy.

—— See Stelling, D., und D. Wilcke: Die Deutsche Verkehrsausstellung. Raum 4. Luftschiffe.

- See Tuckerman, Louis Bryant, and C. S. Aitchison: An analysis of the

deformation of the mooring spindle of the "Shenandoah."

- See Tuckerman, Louis Bryant: Inertia factors of ellipsoids for use in

airship design.

- See Tuckerman, Louis Bryant: Water tests for semirigid airships.

--See Zahm, Albert Francis: Stability equations for airship hulls.

Airships panel. Report of the airworthiness of airships panel.

aeronautical research committee, reports and memoranda, no. 970, october 1924, lon« don, 1925, pp. 19.

Airways. Imperial airways and the Government.

the aeroplane, vol. 29, no. 26 (dec. 23, 1925), london, p. 726.

- Imperial airways, limited.

flight, vol 17, no. 53 (dec. 31, 1925), london, p. 858.

-■ On a year of imperial airways.

tbe aeroplane, vol. 28, no. 13 (apr. 1, 1925), london, pp. 301-304.

- See Cram, Ralph W.: Ultimate airways.

- See Ridgway, Allen: Airways and ainnaps.

- See Weeks, W. S., and J. T. Rutherford: A table for determining drop in

pressure in airways.

Aitchison, Clyde Stanley. See Tuckerman, Louis Bryant, and C. S. Aitchison: An analysis of the deformation of the mooring spindle of the "Shenandoah."

Alaska. Racing the "Black Death" of Alaska for 11,000 lives.

literary digest, vol. 84, no. 8 (feb. 21,1925), new york, pp. 42-48, ill. states why airplanes were not used.

Alayrac. Étude théorique du vol plané dans une atmosphère en mouvement. service technique de l'aéronautique, bulletin technique, no. 26 (mai 1925).

- Méchanique de l'aviation. Application des méthodes de la méchanique

rationnelle à l'étude du vol et de la construction des avions.

paris, qauthier-villars et cie, 1925, pp. 352, ill.

- Quelques précisions sur le vol saus moteur.

la techn. aeron., 16e année, n. s., no. 42,43 (15 avril, 15 mai 1925), paris, pp. 119-124,130-140

53466—28-2

Alatrac, A. Étude du vol plane dans un vent de direction oscillante et dans un vent oscillatoire de courte période.

C. K. Aoad. Soi., T. 180, No. 7 (16 fév. 1926), Péris, ppi 493-495.

Alayrac, J. L'effet Katzmayr et son utilisation pour le vol sans moteur.

L'Aérotecbnique (L'Aéronautique, 7me année, No. 71), 3me année, Num. 28 (avril 1926). Paris, pp. 141-142, ill.

Albatros. Albatros-Fliegerschule.

Aut. Mot. Flug.w, 7. Jahrg., Nr. 4 (28. Febr. 1925), Berlin, p. 7, ill.

- The Albatros L. 69. "Bristol"-engined monoplane wins "Round

Saxony " flight.

Flight, Vol. 17, No. 44 (Oct. 29,1925), London, pp. 701-702, ill., diagr.

Albatross. The soaring flight of the Albatross.

Meteorological Magazine, Vol. 60, (Oct. 1925), London, pp. 216-217.

- See Idrac, P.: Étude expérimentale et analytique du vol sans battements

des oiseaux voiliers des mers australes, de l'Albatros en particulier.

Albenga, Giuseppe. Calcólo di resistenza degli aeroplani.—Nota prima: Le azioni esterne ed il coefficiente di rottura.

Annali del Lavori Pubblici, Anno 62, Fesc. 9°e 12° (Sett-Dic 1924), Roma pp. 805-824,11761188,1U.

Alembert. See Roy, Maurice: Le paradoxe de d'Alembert et les théories aérodynamiques.

Alexandroff, V. L. The commercial monoplane C. A.-H. 1. Type A. K. 1.

Scientific Technical Department of the Supreme Council of National Economy No. 99. Transactions of the Central Aero-Hydrodynamical Institute No, 16, Moscow, 1926, pp. 129, ill., diagrs.

Alford, W. K. See Harris, R. G., and W. K. Alford: Wind-channel tests on

radiators. Ali. See Wings.

All the world's aircraft. <See Grey, Charles Grey: All the world's aircraft 1925. Allen, C. B. The Ford tour.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, p. 606, 634, ill.

Allen, Edmond T. An ideal for air racing.

Aviation, Vol. 19, No. 25 (Dec. 21,1925), New York, pp. 880-881, map.

Allen, J. W. Generator problems due to crankshaft vibrations.

Mechanical .Engineering, Vol. 47, No. 10 (Oct. 1925), New York, pp. 793-794, ill.

Allison. The Allison four-engine transmission.

Aviation, Vol. 19, No. 18 (Nov. 2, 1925), New York, p. 640.

A reduction gear enabling the use of a centralized power installation in large aircraft.

Alloys. Materials and chemistry. Light alloys.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 38-39.

- See Lea, F. C. : Aluminium alloys for aeroplane engines.

- See Meissner, K. L. : Alloys similar to duralumin made in other countries

than Germany.

- See Otey, N. S. : Testing metals for aircraft.

-: See Portevin : L'étude rationnelle des traitements thermiques des alliages

et des alliages légers d'aluminium en particulier. Altimeters. Regulations governing the graduation of altimeters consequent

upon the adoption of an international standard atmosphere. Air Publication 1173, Sept. 1925, London, H. M. Stationery Ofrice.

Altitude. Aparato eléctrico para la determinación de grandes altitudes.

Ibérica, Año 12, Núm. 578 (16 de Mayo 1925), Tortosa, pp. 310-311.

Altitude. See Engines: Increasing aero-engine power at altitude. Bristol "Jupiter" variable-timing gear.

- See Engines: Increasing engine power at altitude.

•——- See Gourdou, C.: La mesure des records d'altitude.

- See Kobayashi, A.: Effect of altitudes on the power of aero engines.

•- See Nobile, Umberto: Altitude of equilibrium of an airship.

Aluminum. Thermal expansion of aluminum and various important aluminum alloys.

aviation, vol. is, no. 20 (may 18, 1925), new york, p. 542.

- See Anderson, Robert J.: Metallurgy of aluminium and aluminium

alloys.

- See Archbutt, S. L.: A method of improving the properties of aluminium

alloy castings.

- See Hidnert, Peter: Thermal expansion of aluminum and various important aluminum alloys.

- See Lea, F. C: Aluminium alloys for aeroplane engines.

- See Portevin: L'etude rationnelle des traitements thermiques des alliages

et des alliages légers d'aluminium en particulier.

Amans. Les observations du Dr. Amans sur la torsion des ailes chez les oiseaux et insectes.

L'aéronautique, 7me année, no. 69 (fév. 1925), paris, p. 43.

Amazon flyers. See Hinton, Walter, and A. W. Stevens: Amazon flyers survive jungle crash.

Ambulances. Advent of the flying ambulance.

review of reviews, vol. 71 (mar. 1925), new york, pp. 330-331.

- The aerial ambulance.

aero digest, vol. 6, no. 1 (jan. 1925), new york, pp. 37-38, ill.

- Development of the aerial ambulance.

aviation, vol. 18, no. 2 (jan. 12, 1925), new york, p. 48.

--See Apolloni, Giovanni: Apparecchi sanitari.

- See Pique, Roberto: Saving lives with airplane ambulances.

American Engineering Standards Committee. See Safety Code: Aeronautic safety code. Tentative American standard.

American Society of Mechanical Engineers. See Mechanical engineering: Progress in aeronautics as related to mechanical engineering.

Ames, Joseph Sweetman. Recent progress in the science, of aeronautics. journ. frankl. inst., vol. 199, no. 1 (jan. 1925), philadelphia, pp. s3-90. reviewed iu: L'aérotechnirjue, (l'aéronautique, 7me année, no. 75 (aoüt 1925), paris, pp. 305-306.

- A resume of the advances in theoretical aeronautics made by Max M.

Münk.

national advisory committee for aeronautics, report no. 213, march 31, 1925, washington government printing office, 1925, pp. 46, ill.

- Steps to be taken by the manufacturers and the Government to stabilize

the aircraft industry.

u. s. air services, vol. 10, no. 1 (jan. 1925), washington, pp. 27-28.

Amsterdam-Batavia. Amsterdam-Batavia flight reviewed. Aviation, Vol. 18, No. 2 (Jan. 12,1926), New York, p. 45.

- See Hoop, Mijnheer van der: The Amsterdam-Batavia flight. Mijnheer

van der Hoop tells of his experience.

Amundsen. The Amundsen expedition.

Aviation, Vol. 18, No. 22 (June 1, 1925), New York, p. 601.

- Le vol d'Amundsen au pôle Nord.

L'Aéronautique, 7me année, No. 74 (juil. 1925), Paris, p. 279, map.

Amundsen, Roald. Amundsen flies back to Spitzbergen.

Aviation, Vol. 18, No. 26 (June 29, 1925), New York, p. 723.

- Amundsen's polar flight.

Flight, Vol. 17, No. 26 (June 25, 1925), London, pp. 392-393, ill.

- Farthest north by air. Capt. Roald Amundsen's story of the flight.

Flight, Vol. 17, No. 40 (Oct. 1, 1925), London, p. 643.

- My polar flight.

London, Hutchinson & Co., 1925, pp. 292, ill.

Amundsen, Roald, and Lincoln Ellsworth. Our polar flight. New York, Dodd, Mead and Co., 1925, pp. 373, ill.

Amundsen, Roald. See North Pole: The North Pole flight.

- See Robertson, F. A. de V.: Proposed Antarctic flight. Amundsen's

"WAL" to be used. Plans of Capt. G. H. Wilkins, M. C.

Anderson, Robert John. Metallurgy of aluminum and aluminum alloys.

New York, Henry Carey Baird and Co., 1925, pp. xxxi, 913, ill.

Andreau. Le moteur Andreau.

C. E. Acad. Sei., T. 180, No. 4 (26 Jan. 1925), Paris, 254-257, ill.

Andreefp, I. F. The investigation of dopes.

Transactions of the Central Aero-Hydrodynamical Institute, No. 14. U. S. S. E. Scientific-Technical Department of the Supreme Council of National Economy, No. 97, Moscow, 1295, pp. 84, ill.

Anemometers. See Eula, Antonio: Anemometria.

Angle, Glenn Dale. Displacement limits for light plane engines. Aviation, Vol. 18, No. 1 (Jan. 5,1925), New York, p. 18.

- Engine dynamics and crankshaft design.

Detroit, Mich., Airplane Engine Encyclopedia Co., 1925, pp. 299, ill., diagrs.

Angle of incidence. See Glauert, H.: Theoretical relationship for a biplane. Anglo-Franco-German pact. The Anglo-Franco-German pact.

The Aeroplane, Vol. 28, No. 9 (Mar. 4, 1925), London, pp. 194, 196.

Ankel, J. A. De nieuwe Fokker C-VI.

Het Vliegveld, 9de Jaarg., No. 5 (Mei 1925), Amsterdam, pp. 132-133, ill.

Annapolis. See United States. To produce officers who can fly.

Antarctic flight. See Robertson, F. A. de V.: Proposed Antarctic flight.

Antiaircraft. The antiaircraft tests.

Aviation, Vol. 19. No. 9 (Aug. 31, 1925), New York, p. 237.

-■ War Department antiaircraft record.

Aviation, Vol. 19, No. 9 (Aug. 31,1925), New York, p. 247.

Antiknock. Engines. Antiknock chemicals.

Aeronutics, Techn. Eep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, p.29.

Antilli, Cbsare. Cenni sulla installazione degli apparati fotografici sugli aeroplani.

head. teen. dir. sup. genio costr. aer., anno 13, n. 1 (15 gen. 1925), roma, pp. 5-11, ill.

Apolloni, Giovanni. Apparecchi sanitari.

rend. tacn. dir. sup. genio costr. aer., anno 13, n. 2 (15 feh. 1925), roma, pp. 16-19, ill.

Applied Mechanics. Proceedings of the First International Congress for Applied Mechanics, Delft 1924. Edited by C. B. Biezeno and J. M. Burgers. delft, technische boekhandel en drackkarij j. waltmann, jr., 1925, pp. xxii, 460, ill.

g. j. taylor: experiments with rotating fluids. th. v. kàrmàn: ueher die stabilität der laminarströmung und die theorie du turbulenz. j. m. burgers: the motion of a fluid in the boundary layer along a plane smooth surface. t. levi civita: la détermination rigoureuse des ondes permanentes d'ampleur finie. sir napier shaw: the physical structure of the atmosphere regarded from the dynamical point of view. n. zeilon: on potential problem in the theory of fluid resistance. u. cisotti: sur les mouvements de rotation d'un liquide visqueux. g. brodetsky: vortex motion. h. solberg: zum turbulenzproblem. l. kaller und a. friedmann: differential-gleichungen für die turbulente bewegung einer kompres-sibelen flüssigkeit. n. kotschiu: tjeher starke diskontinuitäten in eiuer kompressibleu flüssigkeit. v. bjerknes: dio hydrodynamischen fernkräfta und dere zusammenhang mit den auftriebskräften von welchem die aeroplane getragen werdeu. c. koning: einige bemerkungen über nichtstationaïe strömungen an tragflügeln. c. witoszinski: modification du principe de circulation. è. habu: notes sur l'application aux turbomachines des théories modernes de l'hydrodynamique. m. m. münk: the simplifying assumptions, reducing the strict application of classical hydrodynamics to practical aeronautical computa-tations. g. kempf: ueber den reibungswiderstand von flächen verschiedener form. a. g. v. baumhauer: some notes on helicopters.

Appropriations. The Air Service appropriations debate.

aviatiou, vol. 18, no. 3 (jan. 12, 1925), new york, pp. 74-77.

- See England: English air appropriation $101,479,868.

Archbutt, S. L. A method of improving the properties of aluminum alloy castings.

aeronautical research commuttee, reports and memoranda, no. 959 (m. 28.), december 1924, london, 1925, pp. 10. dis., tahls.

Archdeacon, Ernest. Conférence internationale pour l'application pratique de l'Espéranto (14-18 mai 1925).

l'aérophue, 33e année, nos. 11-12 (ler-15 juin 1925), paris, p. 187.

Arctic. Arctic navigation.

aviation, vol. 18, no. 25 (june 22, 1925), new york, p. 701.

- Dirigible to blaze route over top of world; Norwegian expedition.

popular mechanics, vol. 44, (dec. 1925), chicago, pp. 926-927, ill.

- Navy planes will explore Arctic.

aviation, vol. 18, no. 16 (apr. 20,1925,) new york, pp. 442-443.

- See Berson, A.: Das Luftschiff als Forschungsmittel in der Arktis.

- See Binney, George. With seaplane and sledge in the arctic. Preface by

W. J. Sollas.

-- See Tymms, F.: The Oxford University Arctic Expedition 1924. IV.

Aerial navigation in the Arctic.

- See Sandifer, Thaddeus Nelson: Navy aircraft to solve riddles of the

Arctic.

Argentina. Argentine aviation.

aviation, vol. 19, no. 1 (july 6, 1925), new york, p. 16.

Armstrong. See Mallock-Armstrong: Mallock-Armstrong ear defender.

Army air service. Army air service costs once more aired. aviation, vol. 18, no. 1 (jan. 5, 1925), new york, pp. fi-8.

Army air service. Official photographs of the new Army air service uniform. aviation, vol. 19, no. 15 (oct. 12, 1925), new york, pp. 498-499, ill.

Army and Navy. Air controversy in the U. S. A.

flight, vol. 17, no. 8 (feb. 19, 1925), london, p. 95.

-■ The airplane-battleship rumpus.

literary digest, vol. 84, no. 10 (march 7, 1925), new york, pp. 8-9, ill.

--The Army, the Navy, and the airplane.

literary digest, vol. 84, no. 11 (march 14,1925), new york, pp. 71-72.

Arnold, H. H. Contact and refueling now accomplished in the air. scientific american, vol. 133 (aug. 1925), new york, pp. 90-91, 111. literary digest, vol. 86 (sept. 5, 1925), new york, pp. 54-56.

--The performance of future airplanes.

u. s. air services, vol. 10, no. 7 (july 1925), washington, pp. 17-19.

- Wars have forced major developments in United States airplane engine

design.

automotive industries, vol. 53, no. 8 (aug. 20, 1925), new york, pp. 297-300, ill.

- See Refueling: Flying filling-stations in the sky.

Arrachart. Les conditions techniques du raid Arrachart autour de l'Europe. l'aérophile, 33e année, nos. 17-18 (ler-15 sept. 1925), paris, pp. 284-285, map.

Arrachart, Ludovic. Notes de navigation. A propos du raid africain des capitaines Arrachart et Lemaitre.

l'aéronautique, 7me année, no. 73 (juin 1925), paris, pp. 210-212, ill., maps.

- See Blanchet, Georges: Aviateurs contemporains. Ludovic Arrachart et

Henri Lemaitre.

Artificial clouds. See Stewart, C. D. : The measurement of upper wind velocities by observations of artificial clouds.

Aschenbrenner, C. Ueber ein neues halbautomatisches Entzerrungsgerät für den praktischen topographischen Gebrauch.

zeitschrift für instrumentenkunde, bd. 45, no. 7 (juli 1925), berlin, pp. 333-353, ill.

Ash, P. T. Building starters for aeronautical motors.

american machinist, vol. 62, no. 12 (mar. 10, 1925), new york, pp. 463-465, ill.

Ashton, Horace D. See Los Angeles: Aboard the airship "Los Angeles" to Porto Rico and back.

Asia. Soviet air lines in central Asia.

flight, vol. 17, no. 52 (dec. 24, 1925), london, p. 840.

Aspect ratios. See Royal Aircraft Establishment: Lift and drag of the Bristol fighter with wings of three aspect ratios.

Atlantic. See Barlow, E. W.: The upper air circulation of the Atlantic Ocean.

--See Kirste, Léon: Étude d'un avion transatlantique.

- See Oceanic airways: Transoceanic airways. Ambitious heavier-than-air

scheme.

- See Seilkopf, Heinrich: Meteorologische Studienfahrten über denAtlantik

und die meteorologische Beratung transatlantischen Luftverkehrs.

Atmosphere. See Air Ministry: Report of Advisory Committee on Atmospheric Pollution, year ending March 31, 1925.

--See Altimeters : Regulations governing the graduation of altimeters consequent upon the adoption of an international standard atmosphere.

Atmosphere. See Chauveau, B.: Électricité atmosphérique.

--See Diehl, Walter S.: Standard atmosphere—tables and data.

- See Durward, J.: Measurements of vertical currents in the lowest layers

of the atmosphere during sea breezes.

--See Lindholm, P.: Exploratiou de la haute atmosphère par avion.

- See Shaw, Napier: The physical structure of the atmosphere regarded

from dynamical point of view.

- See Toussaint: Étude sur la structure interne, et la turbulence du vent

naturel, dans les couches inférieures de l'atmosphère.

- See Watt, R. A. Watson: The beneficence of atmospherics.

Atjger, Alfred. Mes impressions de Vauville.

l'aéronautique, 7ma année,-no. 77 (oct. 1925), paris, pp. 373-374, ill.

- See Blanchet, Georges: Aviateurs contemporains. Alfred Auger.

Aumont-Thieville. See I. T.: Coupe Aumont-Thieville.

Austin, P. B. Europe takes to the air.

saturday evening post, vol. 198, (aug. 29, sapt. 5, 19, 1925), philadelphia, pp. 3-4, 17, 33, ill., maps.

Austin, Oscar P. Significance of the globe flight from a commercial standpoint.

aero digest, vol. 6, no. 1 (jan. 1925), new york, pp. 20-21, maps.

"Austral air." Australia's only safety—air defense and she knows itl aero digest, vol. 6, no. 5 (may 1925), new york, pp. 247-250, 284, ill.

Australia. Australian experimental aircraft.

tha aeroplane, vol. 28, no. 2 (jan. 14, 1925), london, p. 34, ill.

—— The Australian light aeroplane competitions 1925.

tha aaroplana, vol. 28, no. 15 (apr. 15, 1925), london, p. 362.

—■— Flying in Australia.

flight, vol. 17, no. 7 (feb. 12, 1d25), london, pp. 87-88.

—— The Italian flight to Australia.

flight, vol. 17, no. 24 (june 11, 1925), london, p. 361, ill.

- On the defense of Australia.

the aeroplane, vol. 29, nos. 25-26 (dec. 16-23, 1925), london, pp. 685-690, 713-720.

- See "Austral Air." Australia's only safety—air defense and she knows it!

Austria. See Avis: Some "Avis" school monoplanes. Austrian firm starts original construction.

Autochute. See Holt: The Holt "Autochute."

Autogiro. De Autogiro. Een geheel nieuw luchtvaartuig.

het vliegveld, 9da jaarg., no. 9 (sept. 1925), amsterdam, pp. 234-235, ill.

- L'Autogire C-7.

l'aérotechniqua (l'aéronautique, 7ma année, no. 69), 3me année, num. 26 (fév. 1925), paris, p. 64.

- Meet the Autogiro.

literary digest, vol. 87, no. 8 (nov. 21, 1925), new york, p. 25, ill.

- A new type of airplane.

literary digest, vol. 85, no. 12 (june 20, 1925), new york, pp. 23-24, ill.

- See Cierva: L'Autogire de la Cierva " C-6 bis."

- See Cierva: The Cierva "Autogiro." Noteworthy lecture at the Royal

Aeronautical Society.

Autogiro. See Cierva: The evolution of the Cierva "Autogiro."

- See Cierva: A new type of flying machine. The Cierva "Autogiro"

demonstrated at Farnborough.

- See Cierva, Juan de la: Come ho concepito 1"'Autogiro."

- See Cierva, Juan de la: Comment j'ai conçu l'Autogire.

- See Cierva, Juan de la: De la Cierva Autogiro achieves more success.

- See Loriga: Le pilotage de l'Autogire. Mes impressions de pilote au cours

de trois vols.

- See Loriga: Trois vols décisifs, réussis à Madrid par le capitaine Loriga,

prouvent le haut intérêt de l'Autogire.

-- See McLaughlin, George F.: The La Cierva "Autogiro."

Automatic control. See Backer, J. W. F.: Het automatische vliegtuig.

Auvergne. Le rallye de l'Aéro-Club d'Auvergne.

l'aéronautique, 7me année, no. 74 (juil. 1925), paris, pp. 248-249, ill.

AviA. The Avia B. H. 17 biplane sand tested.

flight, vol. 17, no. 3 (jan. 15,1925), london, p. 29, ill.

Aviation day. The anniversary of flight.

national aeronautic association review, vol. 3, no. 12 (dec. 1925), washington, d. c, pp. 187-188, ill.

Aviators. Progetto di massima di un impianto di cassone pneumatico da far sorgere al campo d'aviazione di Montecelio per le prove psico-fisiologiche degli aviatori.

rend. teen. dir. sup. genio costr. aer., anno 13, n. i. (15 genuaio 1925), roma, pp. 21-30, ili

- Tests for aviators.

science n. s., vol. 62, sup. 10-12 (aug. 7, 1925), garrison, n. y.

Avis. Some "Avis" school monoplanes. Austrian firm starts original construction.

flight, vol. 17, no. 16 (apr. 16, 1925), london, pp. 226-227, ill., diagr.

Avrò. The Avrò passenger carrier.

the aeroplane, vol. 28, no. 11 (mar. 18,1925), london, pp. 258, 260, ill.

- The Avrò training machine.

flight, vol. 17, no. 3 (jan. 15, 1925), london, p. 34.

- The evolution of the Avrò.

the aeroplane, vol. 28, no. 3 (jan. 21,1925), london, pp. 60-62.

- De ontwikkelingsgeschiedenis van het Avrò schoolvliegtuig.

het vliegveld, 9de jaarg., no. 7 (juli 1925), amsterdam, pp. 186-187, ill.

- The original Avrò triplane for South Kensington Museum.

flight, vol. 17, no. 28 (july 9,1925), london, p. 441, ill.

- See Bradfield, F. B.: Measurement of pitching moments due to roll on

wings of Avrò 504.K.

- See Parrott, R. J.: The history and evolution of the Avrò training machine.

B

B. Festlegen und Auswerten von Segelflügen.

flugzeug und yacht, bd. 1, nr. 2 (nov. 1923), wien, pp. 12-14, ill.

B. E. 2C. See Batson, A. S., and H. L. Nixon: Part II. Force measurements on B. E. 2C pressure plotting model.

B. E. 2 C. See Batson, A. S., and H. L. Nixon: Pressure distribution over the wings of a model B. E. 2C biplane with raked wing tips.

Baciocchi, Alighiero. Airplanes invade the Orient.

aaro digest, vol. 6, no. 1 (jan. 1925), naw york, pp. 17-19, ill.

- Flying Spaniards.

aero digest, vol. 7, no. 3 (sapt. 1925), new york, pp. 478-479, 510, ill.

- From the land of the Kalevala to the Zamek.

aero digest, vol. 7, no. 6 (dec. 1925), new york, pp. 664, 690, ill.

- Italy forges ahead.

aero digest, vol. 6, no. 4 (apr. 1925), naw york, pp. 203, 226, ill.

Backer, J. W. F. Het automatische vliegtuig.

hat vtiegveld, 9da jaarg., no. 2-3 (fab.-maart 1925), amsterdam, pp. 46-49, ill.

Bader, H. G. Die Steigerung der Wirtschaftlichkeit des luftverkehrs. zaitsehr. flugt. mot., 16 jahrg., 1. heft (14 jan. 1925), münchen, pp. 1-2.

Badin. Variomètre enregistreur de M. Badin.

l'aérophile, 33e année, nos. 5-6 (ler-15 mars 1925), paris, pp. 75-76, ill.

Baeumker, A. Zweckgedanken im ausländischen Flugzeugbau.

zeitschr. ver. deutsch. ing., bd. 69, nr. 43 (24.0kt. 1925), berlin, p. 1363.

Bairstow, L. The rotor ship and aeronautics.

nature, vol. 115, no. 2891 (mar. 28, 1925), london, pp. 462-164, ill.

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journ. eoy. aer. soc, vol. 29, no. 169 (jan. 1295), london, pp. 3-14 and discussion 15-23, ill.

Bajac, R., et L. Cottpet. Impressions personnelles de pilotes de lignes. l'aéronautia.ue, 7ma annéa, no. 75 (août 1925), paris, pp. 313-314.

Baker, G. S., and E. M. Keary. Experiments with model flying boat hulls, 24th series report. Comparison of longitudinal with transverse steps.

aeronautics. techn. eep. aer. ees. com., 1923-24, vol. 1, london, 1925, pp. 243-250, ill,, diagrs. reports and memoranda, no. 893, august 1923. (aa. 44.)

Baker, J. F. See Pippard, A. J. Sutton, and J. F. Baker: An experimental investigation into the properties of certain framed structures having redundant bracing members.

Balances. See Eula, A.: Le prove alia vasca dei modelli dei galleggianti di idrovolante.

Balloon race. The national elimination balloon race.

aviation, vol. 18, no. 20 (may is, 1925), new york, p. 548, ill.

national aeronautic association review, vol. 3, no. 6 (june 1925), washington, d. c, p. 91.

- See Van Orman, W. G. : Van Orman winner in national elimination balloon

race.

Ballooning. See Shaw, B. Russell: Ballooning and its history.

Balloons. Storage balloons to conserve gasoline.

litarary digest, vol. 86, no. 9 (aug. 29,1925), naw york, p. 21, ill.

Bàllau, sinney. Limitations of aricraft in naval warfare.

proc. u. s. naval inst., vol. 51, no. 267 (may 1925), annapolis, pp. 746-760.

- Seagoing aircraft.

proc. tj. s. naval inst., vol. 50, no. 261 (nov. 1924), annapolis, pp. 1793-1801, ill.

Baranofp, A. v. See Blenk, H., und A. v. Baranoff: Über die Beziehung zwischen der Motorleistung und der Steigfähigkeit von Flugzeugen.

Barbaud, A., et R. LePetit. Mesure du vent en avion et correction de ses effets sur la route suivie.

c. e. aead. sei., t. 180, no. 5 (2 fév. 1925), paris, pp. 368-370, ill.

Bardel, Henri. Le graissage des moteurs à l'huile minérale. Expériences faites sur uue ligne de transport.

l'aéronautique, 7 meannée, no, 72 (mai 1925), paris, p. 194, ill.

- See Verdurand, Abel, et Henri Bardel: L'utilisation des parachutes dans

l'aviation commerciale.

Bahdwell, D. C. See Lind, S. C, and D. C. Bardwell: Mercury and ionized helium.

Barker, W. G. See Stewart, Oliver: The strategy and tactics of air fighting; with introduction by W. G. Barker.

Barksdale, E. H. Flight testing at McCook Field.

aviation, vol. 19, nos. 20-21 (nov. 16-23,1925), new york, pp. 708-711, 750-751, ill.

Barlow, E. W. The upper air circulation of the Atlantic Ocean.

air ministry, meteorological office, professional notes, vol. 3, no. 39 (m. o. 245s.) london, 1925, pp. 200-217. nature, vol. 115, no. 2896 (may 2, 1925), london, p. 655.

Barometric pressure. See Matteuzzi, L. : Sulla previsione sistematica della pressione barometrica.

Bartels, F. Konstruktive Gesichtspunkte des modernen Flugmotorenbaues. Die Wirkungsgrade der Flugmotoren.

zeitschur. flugt. mot., 16. jahrg., 7. heft (14. april 1925), münchen, pp. 148-152, ill.

Bassett, P. R. The night airway.

aero digest, vol. 6, no. 3 (mar. 1925), new york, pp. 140-141,172, ill.

Batavia. See Hoop, Mijnheer van der: The Amsterdam-Batavia flight. Mijnheer van der Hoop tells of his experience.

Bateman, H. See Lock, C. N. H., H. Bateman, and H. C. H. Townsend: The airflow round a body as affecting airscrew performance.

- See Lock, C. N. H., H. Bateman, and H. C. H. Townsend: Experiments

to verify the independence of the elements on an air-screw blade.

- See Lock, C. N. H., and H. Bateman: Experiments with a family of air

screws. Part III. Analysis of the family of air screws by means of the vortex theory and measurements of total head.

- See Lock, C. N. H., and H. Bateman: The measurement of air flow round

an air screw.

- See Lock, C. N. H., and H. Bateman: Some experiments on air screws at

zero torque, with applications to a helicopter descending with the engine "off" and to the design of windmills.

Batson, A. S., and H. L. Nixon. Part II. Force measurements on B. E. 2C pressure plotting model.

aeronautics. techn. eep. aer. ees. com., 1923-24, vol. 1, london, 1925, pp. 223-225, diagrs., tanl.

- Pressure distribution over the wings of a model B. E. 2C biplane with

raked wing tips.

aeronautics. techn. eep. aer. ees. com., 1923-24, vol. 1, london, 1925, pp. 197-222, ills., diagrs. reports and memoranda, no. 891. may, 1923. (ae. 121.)

Batson, A. S. See Irving, H. B., and A. S. Batson: Experiments on a model of a Bristol fighter aeroplane (l/10th scale). Section 1. Force and moment measurements at various angles of yaw.

Batson, A. S. See Frazer, R. A., A. S. Batson, and A. G. Gadd: Experiments on a model of a Bristol fighter aeroplane (l/10th scale). Section 2. Lateral derivatives by the forced oscillation method.

- See Irving, H. B., and A. S. Batson: Forces and moments (including

those due to controls) on a model Fairey "N4" flying boat "Atlanta," at various angles of yaw.

- See Irving, H. B., and A. S. Batson: On the effect of sideslip on the

(aerodynamic forces and moments (including those due to the controls) for

a model S. E. SA aeroplane.

- See Irving, H. B., and A. S. Batson: Summary of data on slotted wings

obtained in the wind tunnel of Messrs. Handley Page.

Badcom, B. V. On the philosophy of command.

u. s. air services, vol. 10, no. 4 (april 1925), washington, pp. 28-32.

Bauer, Peter Paul von. Commercial aviation in Colombia.

national aeronautic association review, vol. 3 ,no. 4 (april 1925), washington, d. c. pp. 52-53.

Baumann, A. Strength calculations on airplanes.

national advisory committee for aeronautics, technical memorandums no. 341, dec. 1925, washington, pp. 23.

from "berichte und abhandlungen der wissenschaftlichen gesellschaft für luftfahrt," july, 1925.

Baumann, R. Die Deutsche Verkehrsausstellung. Raum 2. Materialprüfung. zeitschr. flugt. mot., 16. jahrg., 17. u. 18. heft (9. sept. 1925), münchen, p. 330.

Baumhauer, A. G. v. Some notes on helicopters.

proceedings of the first international congress for applied mechanics delft 1924, delft 1925, pp. 449-154.

Bazzoni,, C. B., and J. T. Lay. Successive stimulation of the arc lines of helium below the ionization potential.

science, n. s., vol. 61, (may 15, 1925), garrison, n. y., p. 518.

Beacons. See Bassett, P. R.: The night airway.

■- See Dane, Roger: Midnight suns of the air mail.

- See Landing light: Field landing light tested at Washington for water

flying.

■- See Page, William H.: Pillars of light.

Beadle, J. B. Airplane speeds up power surveys.

electrical world, vol. 86, no. 7 (aug. 15, 1925), new york, pp. 311-314, ill.

Beardmore. The Beardmore W. B. XXVI. A two-seater fighter of unorthodox design and fitted with 375-horsepower Rolls-Royce "Eagle IX."

flight, vol. 17, no. 34 (aug. 20, 1925), london, pp. 634-536, ill.

- The Beardmore XXVI two-seater fighter.

the aeroplane, vol. 29, no. 8 (aug. 19, 1925), london, p. 250, diagr.

--The last novelty of 1925. (Beardmore XXVI.)

the aeroplane, vol. 29, no. 27 (dec. 30,1925), london, p. 752, ill.

--A new British aeroplane for Latvia. The Beardmore W. B. XXVI, with

Rolls-Royce "Eagle IX" engine.

flight, vol. 17, no. 63 (dec. 31, 1925), london, pp. 850-851, ill.

--See Delalande, P. J.: Les moteurs ä huile lourde Beardmore.

Beardmore-Rohrbach. the beardmore-rohrbach "inverness" flying boat. two napier "lion" engines.

flight, vol. 17, no. 39 (sept. 24,1925), london, pp. 617-618, ill.

- the beardmore-rohrbach inverness type flying boat.

the aeroplano, vol. 29, no. 13 (sept. 23,1925), london, p. 378, ill.

Beardsley, a. h. getting introduced to aerial photography.

photo-era, vol. 56 (nov., 1925), wolfeboro, n. h., pp. 240-253, ill.

Bearings. engines. big end bearings.

aeronautics. techn. eep. aor. ees. com., 1923-24, vol. 1, london, 1925, p. 28.

Beires, José Sarmento de. see blanchet, georges: aviateurs contemporains. josé sarmento de beires.

Belgian Congo. air lines in belgian congo. successful service with handley-page "hamiltons."

flight, vol. 17, no. 48 (nov. 26,1926), london, pp. 777-779, ill., map.

Belgium. See thieffry, f. : historique de la première liaison aérienne entre la belgique et sa colonie.

Bell, l. k. future of the air mail.

outlook, vol. 139 (jan. 28,1925), new york, pp. 141-144, ill., map.

--right road for aviation; work of the select committee of inquiry into the

operation of the united states air services.

outlook, vol. 139 (feb. 11,1925), new york, pp. 223-226, ill.

Benkendorff, Rudolf. kann der begriff "einflusshöhe" aufrecht erhalten werden?

zeitschr. flugt. mot., 16. jahrg., 4. heft (28. feh. 1925), münchen, pp. 108-109.

Berehare, e. See masméjan, a., et e. berehare: les moteurs à explosion dans l'aviation.

Berejkoff, a. p. aerial map of the world.

aviation, vol. 19, no. 8 (aug. 24,1925), new york, pp. 208-209, map.

Berl, c. w. crop protection by airplane duster.

manufacturers' eecord, vol. 88, no. 2 (july 9, 1925), baltimore, pp. 92-93, ill.

Berlin. see r. r.: berliner werbeflugtag am ostermontag, den 13. april 1925, auf dem flugplatz staaken.

Berliner. l'hélicoptère berliner.

l'aéronautique, 7me année, no. 75 (août 1925), paris, p. 291, ill.

Bermuda. airship to bermuda.

scientific american, vol. 132 (may 1925), new york, pp. 344-345, ill.

Berson, a. das luftschiff als forschungsmittel in der arktis.

zeitschr. flugt. mot., 16. jahrg., 10. heft (28. mai 1925), münchen, pp. 203-204.

Bebst, c. a. the kirsten-boeing aerial propeller.

aero digest, vol. 6, no. 6 (june 1925), new york, pp. 308-309, ¡11.

Besançon, Georges. l'année aéronautique 1924. rapport présenté à l'asem-blée générale de l'aéro-club de france, le 28 mars 1925.

l'aérophile, 33e année, nos. 9-12 (ler-15 mai ler-15 juin 1925), paris, pp. 135-141,171-175, ill.

Beth, h. j. e. the stabilisation of instable equilibrium by means of gyroscopic forces.

london, edinburgh and dublin. philosophical magazine journal science, vol. 49, (june 1925), london, pp. 1183-1190.

Bettis, "Cy." see marshall, edward: winning the pulitzer race. an interview with "cy" bettis.

Betz, A. The "Magnus effect," the principle of the Flettner rotor.

national advisory committee for aeronautics, technical memorandums no. 310, april, 1925, washington, pp. 23, ills., diagrs. from "zeitschrift des vereines deutscher ingenieure," jan. 3, 1925.

- Der Magnus-Effekt, die Grundlage der Flettnerwalze.

zeitsch. ver. deutsch. ing., bd. 69, nr. 3 (3. jan. 1925), berlin, pp. 9-14, ill.

- A method for the direct determination of wing-section drag.

national advisory committee for aeronautics, technical memorandums no. 337, nov., 1925, washington, pp. 8, ill. from "zeitschrift für flugtechnlk und motorluftschiffahrt," feb. 14, 1925.

- Ein Verfahren zur direkten Ermittlung des Profilwiderstandes.

zaitschr. flugt. mot., 16. jahrg., 3. heft (14. feb. 1925), münchen, pp. 42-44.

- Zur Aerodynamik des magnuseffektes.

zeitsch. ver. deutsch. ing., bd. 69, nr. 21 (23. mai 1925), barlin, pp. 728-729.

Betne, J. La protection de l'aviateur contre les effets mécaniques de l'accident d'aviation.

l'aéronautique, 7me année, no. 75 (août 1925), paris, pp. 309-311, ill. Bibliography. See Brockett, Paul: Bibliography of aeronautics, 1920-1921.

- See Brockett, Paul: Bibliography of aeronautics, 1922.

Bienen, Th. Die günstigste Schubverteilung für die Luftschraube bei Berücksichtigung des Profilwiderstandes.

zeitschr. flugt. mot., 10. jahrg., 10. heft (28. mai, 13. juni 1925), münchen, pp. 209-213, 221-226, ill.

- Weiterer Beitrag zur Theorie der Luftschrauben.

zeitsch. var. deutsch. ing., bd. 69, nr. 25 (20. juni 1925), berlin, pp. s47-850, ill.

Bienen, Th., und Th. v. Karman. Zur théorie der Luftschrauben.

aerodynamisches institut der technischen hochschule, aachen, germany.

Biezeno, C. B., and J. M. Burgers. Proceedings of the First International Congress for Applied Mechanics, Delft, 1924—editida C. B. Biezeno e J. M. Burgers.

delft, technische boakhandal en drukkerij j. waltmann jr., 1925, pp. iiü, 460, ill.

Bingham, Hiram. America's first aviator Senator.

aviation, vol. 18, no. 2 (jan. 12,1925), new york, p. 46, ill.

- The Bingham bill promotes as well as regulates air navigation.

aviation, vol. 19, no. 26 (dec. 28, 1925), new york, pp. 910-911. ill.

- The most precious thing in the world.

u. s. air services, vol. 10, no. 8 (aug. 1925), washington, pp. 11-14, ill

- Senator Bingham reports on Government aviation.

aviation, vol. 19, no. 9 (aug. 31, 1925), new york, p. 238, ill.

Binney, George. With seaplane and sledge in the Arctic. london, hutchinson and co., nov., 1925, pp. 287, ul. preface by w. j. sollas.

Biology. See Rosner-Hertalf, Franz: Biologische Prinzipien am Flugzeug.

BiONDi, Ltjigi. I coefficienti di spinta e di potenza per l'elica funzionante a punto fisso e in vicinanza di esso.

rand. teen. dir. sup. genio costr. aar., anno 13, n. 1 (15 gan. 1925), roma, pp. 12-17, ul.

- II girostato nelle sue applicazioni agli istrumenti di navigazione aerea.

l'aerotecnica, vol. 5, n. 4 (luglio-agosto 1925), pisa, pp. 207-228, ill.

Biplane. See Glauert, H.: Theoretical relationships for a biplane.

Biquard, R., and A. Chenu. Procédé de régénération du gaz des dirigeables évitant leur dégonflement.

c. k. acad. sei., t. 179, no. 26 (29 dée. 1924), paris, pp. 1693-1696.

Bird plight. See Albatross : The soaring flight of the Albatross.

- See Amans: Les observations du Dr. Amans sur la torsion des ailes

chez les oiseaux et insectes.

- See FuUerton, J. D.: The flight of birds.

- See Idrac, P. : Étude expérimentale et analytique du vol sans battements

des oiseaux voiliers des mers australes, de l'Albratros en particulier.

- See Walker, Gilbert T. : The flapping flight of birds.

Birnbaum, Walter. Untersuchung der Biegungsschwingungen von Schraubenfedern.

zeitschr. flugt. mot., 16 jahrg., 3. heft (14 feb. 1925), münchen, pp. 74-78, ill.

Bjerknes, V. Die hydrodynamischen Fernkräfte und deren Zusammenhang mit den Auftriebskräften von welchem die Aeroplane-getragen werden.

proceedings of the first international congress of applied mechanics delft 1924, delft 1925, pp. 411-413.

- Om aeroplaners baereevne og motstanden mot deres vevaegelse.

ingenibren, vol. 33, no. 48 (nov. 29, 1924), copenhagen, pp. 549-566, ill.

- Sur les forces qui portent les aéroplanes et leur relation avec les actions

hydrodynamiques à distance.

journal de physique et le radium, t. 5, no. 12 (déc. 1924), paria, pp. 353-367, ill.

Black, Archibald. Airline investment and operating costs.

aviation, vol. 19, nos. 6-6 (aug. 3-10, 1925), new york, pp. 118-120, 151-153, ill.

- Developing a thoroughbred.

aero digest, vol. 7, no. 4 (oct. 1925), new york, pp. 524-527, 570, ill.

- The fourth arm of transport.

aero digest, vol. 6, no. 6 (june 1925), new york, pp. 301-303, 338, ill.

- Have you a landing field in your town?

aero digest, vol. 6, no. 4 (april 1925), new york, pp. 186-187, 228, ill.

- $10,000 airplane engine depreciates $10.60 per hour of service.

automotive industries, vol. 53, no. 11 (sept. 10, 1925), new york, pp. 411-413.

- See Alaska: Racing the "Black Death" of Alaska for 11,000 lives.

Blackburn. The Blackburn flying school. A few impressions of a visit to Brough.

flight, vol. 17, no. 16 (apr. 16, 1925), london, pp. 223-225, ill.

- The Blackburn twin-float seaplane, Napier "Lion" engine.

flight, vol. 17, no. 19 (may 7, 1925), london, pp. 269-272, ill., diagr.

- A new Blackburn torpedo seaplane.

flight, vol. 17, no. 45 (nov. 5, 1925), london, pp. 715-717, ill.

Blackburne. The Blackburne "Thrush" light plane engine. First to pass Air Ministry 100 hours' type tests.

flight, vol. 17, no. 53 (dec. 31, 1925), london, p. 856, ill.

Blanchet, George. Aviateurs contemporains. Alfred Auger.

l'aérophile, 33e année, nos. 15-16 (ler-15 août 1925), paris, pp. 225-226, port.

- Aviateurs contemporains. André Corouge et Louis Macheny.

l'aérophile, 33e année, nos. 19-20 (ler-15 oct. 1925), paris, pp. 289-290, ports.

- Aviateurs contemporains. Le colonel François de Vergnette de Lamotte.

l'aérophile, 33e année, nos. 3-4 (ler-15 fév. 1925), paris, pp. 33-34, port.

Blanchet, George. Aviateurs contemporains. Commandant Dagnaux. l'aérophile, 33a annéa, nos. 21-22 (lar-15 nov. 1925), paris, pp. 321-322, port.

- Aviateurs contemporains. Georges Villa.

l'aérophila, 33s annéa, nos. 13-14 (lar-15 juil. 1925), paris, pp. 193-194, port.

- Avaiteurs contemporains. Jacques P. Schneider.

l'aérophila, 33a année, nos. 9-10 (lar-15 mai 1925), paris, pp. 129-130, port.

- Aviateurs contemporains. José Sarmento de Beires.

l'aérophile, 33a année, nos. 23-24 (lar-15 déc. 1925), paris, pp. 353-354, ports.

- Aviateurs contemporains. Les frères Julieu et Adrien Levasseur.

l'aérophile, 33a annéa, nos. 11-12 (ler-15juin 1925), paris, pp. 161-162, ports.

- Aviateurs contemporains. Ludovic Arrachart et Henri Lemaitre.

l'aérophile, 33a année, nos. 7-8 (ler-15 avril 1925), paris, pp. 97-98, ports.

- Aviateurs contemporains. Maurice Finat.

l'aérophile, 33a année, nos. 5-6 (lar-15 mars 1925), paris, pp. 65-66, port.

- Aviateurs contemporains. Pierre Ducas.

l'aérophila, 33e année, nos. 17-18 (ler-15 sept. 1925), paris, pp. 257-258, port.

-■ De continent à continent. Le premier record officiai, par avion, de distance en ligne droite sans escale et sans ravitaillement.

l'aérophile, 33a année, nos. 3-4 (lar-15 fév. 1925), paris, pp. 43-45, ill.

- Le record mondial de la vitesse. Considérations, mise au point et précisions sur les moyeus qui 'assurèrent la victoire.

l'aérophila, 33a année, nos. 1-2 (lar-15 jan. 1925), paris, pp. lo-ll, ill.

Blanchet, Pierre. Quelques considérations sur l'installation des groupes motopropulseurs à bord des avions.

la techn. aéron., 16a année, n. s., no. 44 (15 juin 1925), paris, pp. 171-189, ill.

Blasius, H. Über Schwingungserscheinungen an einholmigen Unterflügeln. zaitschr. flugt. mot., 16. jahrg., 3. haft (14. fob. 1925), münchan, pp. 39-42, ill.

Bleistein, W. Effect of speed on economy of airship traffic.

national advisory committee for aeronautics, technical memorandums no. 302, feh. 1925, washington, pp. 55, diagrs. from "zeitschrift für flugtechnik und motorluftschiffahrt," oct. 2s, dec. 13 and 27, 1924.

Blenk, H., und F. Liebers. Gekoppelte Torsions-und Biegungsschwingungen von Tragflügeln.

zaitschr. flugt. mot., 16. jahrg., 23. heft (14. dez. 1925), münchen, pp. 479-486, ill.

Blenk, H., und A. v. Baranofp. Über die Beziehung zwischen der Motorleistung und der Steigfähigkeit von Flugzeugen.

zeitschr. flugt. mot., 16. jahrg., 24. heft (28. dez. 1925), münchen, pp. 499-501, diagrs.

Blenk, H. See Fuchs, R., und H. Blenk: Die Beanspruchung von Flugzeugen beim Abfangen.

Blé riot. Le monoplan Blériot.

l'aérotechnique, (l'aéronautique, 7me année, no. 70), 3me année, num. 27 (mars 1926), paris, pp. 93, 98, ill.

- The new four-engined Bleriot air huer.

aviation, vol. 19, no. 24 (dec. 14, 1925), new york, pp. 844-845, ill., dlagr.

Blessing, A. R. Aircraft, battleships, submarines; reading list on the relative value of these fighting units.

library journal, vol. 50 (jan. 1, 1925), naw york, pp. 31-32.

Blume, Wa. Der "Habicht."

zaitschr. flugt. mot., 16. jahrg., 1.2 haft (14.28 jan. 1925), münchan, pp. 3-6, 24-28, ill

Bltjmenthal Otto. Pressure distribution on Joukowski wings.

national advisory committee for aeronautics, technical memorandum no. 330, oct., 1925, washington, pp. 1-16, ill. from "zeitschritt für flugtechnik und motorluftschiffahrt," may 31, 1913.

Board of Surveys and Maps. See Bowie, William: Board of surveys and maps and aeronautics.

Bodenlos, William E. How to build a model airplane.

the ace, vol. 7, no. 3 (dec. 1925), glendale, calif., p. 6, ill.

Boehecker, K. J. The economy of air cooling.

aviation, vol. 18, no. 18 (may 4,1925), new york, pp. 492-493, ill.

Boeing. The Boeing air mail plane.

aero digest, vol. 7, no. 4 (oct. 1925), new york, pp. 546-548, ill.

u. s. air services, vol. 10, no. 11 (nov. 1925), washington, pp. 43-44, ill.

- The Boeing mail plane.

aviation, vol. 19, no. 11 (sept. 14, 1925), new york., p. 321, ill.

- The Boeing PB1.

aviation, vol. 19, no. 12 (sept. 21, 1925), new york, p. 357, ill.

Boel, Maurice. Le vol ramé des oiseaux et sa réalisation mécanique.

l'aéronautique, 7me année, no. 76 (sept. 1925), paris, pp. 349-352, ill.

Boles, Thomas. Volcano destroys landing field.

aviation, vol. 18, no. 1 (jan. 5, 1925), new york, p. 21.

Boll weevil. See Berl, C. W. : Crop protection by airplane duster. Bolshevism. Moscow to Peking by air; bolshevist publicity in the Orient.

living age, vol. 326 (sept. 26, 1925), boston, pp. 661-666!

Bombardier. Une femme champion de sphériques.

l'aérophile, 33e année, nos. 21-22 (ler-15 nov. 1925), paris, pp. 337-338, port.

Bombers. Air Service asks bids for heavy bombers.

aviation, vol. 18, no. 5 (feb. 2, 1925), new york, p. 126.

Bombing. On torpedoes and things.

the aeroplane, vol. 29, no. 19 (nov. 4, 1925), london, pp. 522-524, ill.

- See Carolin, Norbert: Captain Carolin on bombing.

- See Inglis, H. B.: Bombing.

- See Simpson, B. W. : Bombing accuracy.

Bomer, F. Air fighting in Morocco.

aero digest, vol. 6, no. 2 (feb. 1925), new york, pp. 88, 89.

- Japan's air force is full grown.

aero digest, vol. 6, no. 6 (june 1925), new york, pp. 297-298, 336, ill.

Bond, Wilfred Noël. An introduction to fluid motion.

london and new york, edward arnold and co., longmans, green <fc co., 1925, pp. 94.

Bonifacio, Ferdinando. H velivolo, con cenno aile altre macchine aeree ed ai paracadute (Associazione italiana di aeronautica A. I. D. A. sezione di Napoli).

napoli, tip. esperia, 1925, pp. 212, ill.

Bootleggers. Ups and downs of the flying bootleggers.

literary digest, vol. 85, no. 1 (apr. 4, 1925), new york, pp. 76-79.

Borck, Hermann. Die Auswahl der günstifsten Luftschraube.

zeitschr. flugt. mot., 1«. jahrg., 24. heft (28. dez. 1925), münchen, pp. 501-507, ill., diagrs

Bose, N. K. Hydrodynamical principles of Herr Flettner's "Rotor ship."

bulletin of the calcutta mathematical society, vol. 16, no. 2,1925-26, calcutta university press, 1925, pp. 89-98.

Bose, N. K. Wind channels in aerodynamics.

london, edinburgh, and duhlin philosophical magazine and journal of science, vol. 49, no. 293 (may 1925), london, pp. 808-817.

Boss. See Fage, A.: The effect of a large boss on air screw performance. Boston. The air exhibit in Boston.

aviation, vol. 19, no. 24 (dac. 14, 1925), new york, pp. 843, 845.

- Boston air show.

national aaronautic association review, vol. 3, no. 12 (dec. 1925), washington, d c, pp. 188, 190.

— See Knight, L. R.: Boston airport points way to all cities.

- See Warner, Edward P. : The building of Boston airport.

Bostwick, A. E. The word aeroplane.

nature, vol. 115, no. 2896 (may 2, 1925), london, pp. 650-651.

Bouché, Henri. Le Colonel Casse.

l'aéronautique, 7me annéo, no. 78 (nov. 1925), paris, pp. 401-402, port.

- Deux jours à l'escadrille de Bien-Hoa. Un exemple de travail de l'aviation coloniale en Indo-Chine.

l'aéronautique, 7me année no. 73 (juin 1925), paris, pp. 203-209, ill.

- Editor of L'Aeronatique visits United States.

aviation, vol. 19, no. 7 (aug. 17, 1925), new york, pp. 176-177, ill.

- Tableau de l'aéronautique japonaise.

l'aéronautique, 7ma année, no. 77 (oct. 1925), paris, pp. 363-372, ill.

- Visite à l'aviation des États-Unis.

l'aéronautique, 7ma année, no. 78 (nov. 1925), paris, pp. 403-414, ill.

Bouligand, G. Une méthode approchée pour étudier le mouvement de certains anneaux tourbillonnaires.

o. r. acad. sel., t. 180, no. 26 (29 juin 1925), paris, pp. 2019-2021.

Boulton and Paul. The Boulton and Paul Bugle.

the aaroplana, vol. 28, no. 17 (apr. 29, 1925), london, pp. 412-416, ill.

- The Boulton and Paul "Bugle." Two Bristol "Jupiter" engines.

flight, vol. 17, no. 17 (apr. 23,1925), london, pp. 235-238, ill., diagr.

Bowie, William. Board of surveys and maps and aeronautics.

national aaronautic association raviaw, vol. 3, no. 4 (apr. 1926), washington, d. o., pp. 56-58.

Botd. Boyd variable camber monoplane.

aviation, vol. 18, no. 1 (jan. 6, 1925), naw york, p. 23.

Botden, Hayne D. Aerial adventures in Hispaniola.

tj. s. air services, vol. 10, nos. 7,10 (july, oct. 1926), washington, pp. 27-31, 41-45, ill.

Boykow. Neuere Mittel zur Navigierung von Luftschiffen.

luftfahrt, bd. 28, nr. 14 (20. okt. 1924), barlin, pp. 233-235, ill.

BoYNTON, H. B. The distance type motometer.

aero digast, vol. 7, no. 1 (july 1925), naw york, pp. 370, 372, ill.

Bradfield, F. B., and L. P. Coombes. Autorotation measurements on a model aeroplane with zero stagger.

aeronautical research committee, reports and memoranda, no. 975 (aa. 189), april 1926, london, 1925, pp. 7, ill., diagrs.

Bradfield, F. B. Measurement of pitching moments due to roll on wings of Avrò 504.K.

aaronautical research committee, reports and memoranda, no. 944 (ae. 164), november 1924, london, 1926, pp. 6, 111., diagrs.

53466—2S-3

Bradfield, F. B. On the use of a slotted trailing flap on aerofoils of various cambers.

aeronautics. tech. hep. aer. ees. com., 1923-24, vol. 1, london, 1925, pp. 125-133, ills., diagrs.

- Pitching and yawing moments with side slip on a model aeroplane with zero

stagger.

aeronautical research committee, reports and memoranda, no. 965 (ae. 181), january 1925, london, 1925, pp. 14, ills., diagrs., tabls.

- Scale effects on struts and drag of wiring plates of a Bristol fighter. Correction of model tests for comparison with the full scale.

aeronautics. techn. rep. aer. res. com., 1923-24, vol. 2, london, 1925, pp. 442-460, ill., diagrs. reports and memoranda, no. 890, november 1923 (ae. 120).

Bradfield, F. B., and A. S. Hartshorn. Test of three aerofoils suitable for high speed. A. D. 1, Sloane, and R. A. F. 26.

aeronautical research committee, reports and memoranda, no. 943 (ae. 163), october 1924, london, 1925, pp. 4, ill., diagrs., tabls.

Bradfield, F. B. See Douglas, G. P., F. B. Bradfield, and A. S. Hartshorn: The lateral control of a biplane by combined use of ailerons and varying leading edge slots.

Bradley, G. H. See King, W. V., and G. H. Bradley: Airplane dusting controls malaria mosquitoes.

Bradley, W. F. Sleeve vale aircraft engine passes French endurance test. automotive industries, vol. 53, no. 15 (oct. 8, 1925), new york, pp. 632-633, ill.

Bsamson. See Savage-Bramson: The Savage-Bramson antistall gear. A new device with great possibilities.

Bramson, M. L. On accidental stalling.

flight, vol. 17, no. 25 (june 18, 1925), london, p. 369. slipstream, vol. 6, no. 8 (aug. 1925), dayton, ohio, pp. 23-24.

- On engine failures and forced landings.

flight, vol. 17, no. 11 (mar. 12,1925), london, pp. 147.

- On the prevention of accidental stalling.

flight, vol. 17, no. 33 (aug. 13, 1925), london, p. 526.

- Practical flying.

flight, vol. 17, no. 48 (nov. 26, 1925), london, p. 787.

Brancker, William Sefton. Commercial aviation.

journ. roy. soc. arts, vol. 73, no. 3785 (june 5,1925), london, pp. 649-663, map.

- The lessons of six years' experience in air transport.

flight, vol. 17, no. 41 (oct. 8,1925), london, pp. 658-661.

journ. royal aer. soc, vol. 29, no. 179 (nov. 1925), london, pp. 552-585.

- Sir Sefton Brancker's air tour. Alan Cobham again makes good.

flight, vol. 17, no. 12 (mar. 19, 1925), london, pp. 162-164, ill.

--See Cobham, Alan J.: London, Rangoon, and way stations by air.

- See M. L.: Le voyage de Sir Sefton Brancker de Londres ä Rangoon et

retour.

- See Thomson, Lord, and W. Sefton Brancker: Britain in the air.

Brandenberg. Die Lage der deutschen Luftfahrt.

zeitschr. ver. deutsch. ing., bd. 69, nr. 43 (24 okt. 1925), berlin, p. 1363.

Brandenburg, Ernst. See Poeschel, Johannes: Einführung in die Luftfahrt . . .

Brant, Gerald. What really happened in Hawaiian maneuvers.

aviation, vol. 19, no. 3 (july 20, 1925), new york, pp. 66-68.

Brasiello, Aw. Teucro. La navigazione aerea nel diritto. Conferenza tenuta in Napoli ai 26 aprile 1925, per invito dell' Associazione Italiana di Aerotecnica-Sezione di Napoli.

quaderni aeronautici, voi. 4, napoli, 1925, pp. 57.

Breckel, Harrt F. Aircraft radio. Its early history and more recent developments.

aero digest, vol. 6, no. 2 (fab. 1925), new york, pp. 82-83, 102, ill.

- Radio for aircraft.

u. s. air services, vol. 10, no. 12 (dec. 1925), washington, pp. 29-34, ill.

Breha. Prova elastica di rottura dell' apparecchio Breda 4, 120 c. v. eseguita a sesto S. Giovanni il 7 Agosto 1925 (apparecchio scuola a posti affiancati.

eand. tecn. dir. qan. ganio costr. aer., anno 13, n. 8 (15 nov. 1925), roma, pp. 3-6, ill.

Brequet. Le nouveau quadrimoteur Breguet.

l'aérotechnique (l'aéronautiqua, 7me année, no. 75), 3me année, num. 32 (août 1925), paris, pp. 303-304, ill.

Bregtjet, Louis. L'aviation aux États-Unis.

l'aérophile, 33a année, nos. 23-24 (ler-15 déc. 1925), paris, pp. 356-361, ill.

- The Breguet military plane.

aaro digest, vol. 7, no. 5 (nov. 1925), new york, p. 598, ill.

- Considérations nouvelles sur le vol à voile dynamique.

la tachn. aéron., 16a année, n. s., no. 47, 48 (15 sept., 15 oct. 1925), paris, pp. 258-275, 300317, ill.

- Sur le rendement des appareils récepteurs de l'énergie du vent.

c. r. acad. sci., t. 180, no. 26 (29 juin 1925), paris, pp. 2017-2019,111.

Brennan. Le prove dell' elicottero inglese Brennan.

gazzetta dell' aviaziona, anno 7, n. 78 (8 ottobre 1925), milan.

Breuer, R. Auto und Flugsport.

aut. mot. flugw., 7. jahrg., nr. 16 (31 aug. 1925), berlin, pp. 449-450.

--Der deutsche Luftverkehr im Jahre 1925.

aut. mot. flugw., 7. jahrg., nr. 7 (15. apr. 1925), berlin, pp. 189-190, m..

Briggs, L. J., G. F. Hull, and H. L. Dryden. Aerodynamic characteristics of airfoils at high speeds.

national advisory committee for aeronautics, report no. 207, april 15, 1925, washington, govemmant printing offlca, 1925, pp. 17, ills., diagrs.

Brilioth, Borge. Sweden's air industry.

aero digast, vol. 7, no. 6 (dec. 1925), naw york, pp. 656-657, ill.

Brilioth, Börje. Swedish air-mindedness.

aero digast, vol. 6, no. 1 (jan., 1925), new york, pp. 35-36.

Brion. L'Estimographe Brion.

l'aérotechnique (l'aéronautique, 7ma année. no. 75), 3me année, num. 32 (aût 1925), paris, p. 302, ill.

Bristol. The Bristol Jupiter aircraft engine.

automobila engineer, vol. 15, no. 201 (april 1925), london, pp. 96-103, ill.

- The Bristol "Jupiter" 100-hour type test.

flight, vol. 17. no. 6 (fab. 5, 1925), london, p. 73, diagr.

- The Bristol Lucifer IV.

tha aaroplane, vol. 29, no. 7 (aug. 12,1925), london, p. 220.

--The Bristol variable timing gear.

tha aoroplane, vol. 28, no. 8 (feb. 25, 1925), london, pp. 182, 184, ill.

- " Bristols " in Italy. New Caproni fitted with two "Jupiters."

flight, vol. 17, no. 38 (sapt. 17, 1925), london, pp. 593-595, 111.

Bristol. "Bristols" on the Continent. "Jupiter" the standard engine in 13 countries.

flight, vol. 17, no. 48 (nov. 26, 1926), london, pp. 780-781, ill.

- Experiments on a model of a Bristol fighter aeroplane (l/10th scale).

. Section 1. Force and moment measurements at various angles of yaw.

By H. B. Irving and A. S. Batson. Section 2. Lateral derivatives by the forced oscillation method.- By R. A. Frazer, A. S. Batson and A. G. Gadd. aeronautical research committee, reports and memoranda, no. 932 (ae. 153.), october 1924. london, 1925, pp. 40, ills, diagrs. tabls.

- New1 Bristol type tests. Improved "Lucifer" develops 120 B. H. P.

flight, vol. 17, no. 32 (aug. 6, 1925), london, p. 496.

- See Bradfield, F. B.: Scale effects on struts and drag of wiring plates of

a Bristol fighter. Correction of model tests for comparison with the full scale.

- See Engines: Increasing aero engine power at altitude. Bristol "Jupiter"

variable timing gear.

- See Kuipers, C.: Bristol motoren.

- See Reif, E. F., and E. Ower: Lift, drag and pitching moment of the

£th scale Bristol fighter model in the Duplex wind tunnel.

- See Reif, E. F., and L. J. Jones: Measurements of lift, drag, and pitching

moment on the scale model of the Bristol fighter with airscrew running.

- See Royal Aircraft Establishment: The lift and drag of a standard Bristol

fighter aeroplane.

- See Royal Aircraft Establishment Lift and drag of standard Bristol fighter

with R. A. F. 4D engine. Comparative full scale and model tests.

- See Royal Aircraft Establishment: Lift and drag of the Bristol fighter

with wings of three aspect ratios.

- See Stevens, H. L.: Full-scale tests of a Bristol fighter with increased

rudder control.

Bristow, W. A. Die Entwicklung der Flugmotorenkonstruktionen nach dem Kriege.

motorwagen, vol. 28, nr. 16 (june 10,1925), berlin, pp. 329-337.

--Entwicklung der Motor-Luftfahrzeuge nach dem Kriege.

zeitschr. ver. deutschr. ing., bd. 69, nr. 10 (7. märz 192), berlin, pp. 322-323.

Britannia trophy. Award of Britannia trophy.

flight. vol. 17, no. 15 (apr. 9 1925), london, p. 216.

- The Britannia trophy presentation.

the aeroplane, vol. 28, no. 14 (apr. 8, 1925). london, p. 330.

British Association. Aeronautics at the British Association meeting.

the aeroplane, vol. 29, no. 11 (sept. 9, 1925), london, pp. 322, 324.

Brocard. Y a-t-il une crise de pilotes?

l'aerophile, 33e anee, nos. 19-20 (ler-15 Oct. 1925), paris, pp. 291-292 port.

Brock, N. H. Brock development of aerial mapping.

military engineering, vol. 17, no. 96 (nov.-dec. 1925), washington, pp. 504-509, ill. united states war department publications.

Brock & Weymouth. Engineering data from aerial views.

philadelphia, brock & weymouth, incorporated. engineers, [1925], pp. 16.

Brockett, Paul. Bibliography of aeronautics 1920-1921.

national advisory committee for aeronautics, washington, government printing office, 1925, pp. 448.

- Bibliography of aeronautics 1922.

national advisory committee for aaronauties, washington, government printing office, 1925, pp. 167.

Brodetskt, G. Vortex motion.

proceedings of tha first international congress for applied mechanics dalft 1924, delft 1925, pp. 374-379.

Broenie, de. De nieuwe Fairey zeevliegtuigen voor de Koninklijke Marine. het vliegveld, 9de jaarg., no. 7 (juli 1925), amsterdam, pp. 184-185, ill.

Broken body. See Royal Aircraft Establishment: Determination of scale effect on the centre of pressure of R. A. F. 14, B. E. 2C biplane with three values of stagger.

Brooklet, W. H. Sky writing.

national aeronautic association eeviaw, vol. 3, no. 6 (juna 1925), washington, d. c, pp. 83, 92.

Brooks, M. Interpretation of aerial photographs.

photo-era, vol. 53, (nov. 1924), wolfeboro, n. h., pp. 245-250, ill., maps.

Browning machine gun. New .50 antiaircraft gun tested.

aviation, vol. 19, no. 16 (oct. 19, 1925), new york, p. 553.

Brunel, Georges. Aerophilatélie.

l'aérophile, 33a année, nos. 5-6 (ler-15 mars 1925), paris, pp. 84-85, ill.

Bruno, H. A. Flying explorers. Lieut. Walter Hinton and Captain Stevens discover the source of the Parima River in unknown Brazil. aaro digest, vol. 7, no. 1 (july 1925), new york, pp. 362-363, 396, ill.

--Making flying safe.

slipstream, vol. 6, no. 3 (march 1925), dayton, ohio, pp. 17-20, ill.

Brussels. The Brussels-Congo flight.

flight, vol. 17, no. 22 (may 28, 1925), london, pp. 327-328, map.

- The Brussels-Kinshasa flight.

flight, vol. 17, no. 22 (may 28, 1925), london, p. 329.

- Het international congres voor luchtvaart te Brussel.

het vliegvald, 9da jaarg., no. 11 (oct. 1925), amsterdam, pp. 284-285.

Brutne, H. G. de. Zeevliegerij in den Orient.

het vliagveld, 9da jaarg., nos. 2-3 (feh.-maart 1925), amsterdam, pp. 40-42, ill.

Bryan, Leslie Atjlis. Aerial transportation.

winfleld, kans., anderson prass, 1925, pp. xii, 153.

Bryant, L. W., and D. H. Williams. Discontinuous flow around the edge of a bluff obstacle.

aeronautical research committee, reports and mamoranda, no. 962 (ae. 178), january 1925, london, 1925, pp. 4, ills., diagrs.

- An investigation of the flow of air around an aerofoil of infinite span.

nature, vol. 116, no. 2905 (july 4,1925), london, p. 34. (royal society juna 25, 1925).

- On the effect of inertia on the lateral motion of an aeroplane under the

influence of gusts and control movements.

aaronautical research committea, reports and memoranda, no. 939 (ae. 160), october 1924, london, 1925, pp. 3, diagrs.

Buchanan, J. S. Royal Aero Club light aeroplane competition.

national advisory committee for aeronautics, technical memorandums no. 297, jan. 1925, washington, pp. 33, tabls. papar raad before tha royal aeronautical society, oct. 30,1925.

Buckingham, c. t. see eaton, h. n., and c. t. buckingham: nonmetallic diaphragms for instruments.

Budig, Friedrich. bericht über versuche und druckmessungen an querrudern im fluge.

zeitsehr. flugt. mot., 16. jahrg., 16. heft (28. aug. 1925), münchen, 307-310, ill.

Buffalo. revival of manufacturing at buffalo.

aviation, vol. 19, no. 10 (sept. 7, 1925), new york, pp. 280-281, ill.

Buhl-Verville. the buhl-verville aircraft corporation formed.

aviation, vol. 18, no. 12 (mar. 23, 1925), new york, p. 324, ill.

Bulkheads. See royal aircraft establishment: fire experiments with various types of fireproof bulkheads.

Bureau des longitudes. annuaire du bureau des longitudes pour 1925. paris, gauthier-villars & cie., 1925, pp. 686, charts.

Bureau of aeronautics. See engines: the aeronautical engine laboratory, naval aircraft factory, philadelphia.

Bureau of census. See steuart, william m.: department of commerce in aeronatics. bureau of the census.

Bureau of fisheries. See o'malley, henry: department of commerce in aeronautics. bureau of fisheries.

Bureau of foreign and domestic commerce. See klein, julius: department of commerce in aeronautics. bureau of foreign and domestic commerce.

Bureau of lighthouses. See putnam, george r.: department of commerce in aeronautics. bureau of lighthouses.

Bureau of mines. see helium: bureau of mines takes over helium.

Bureau of navigation. see carson, d. b.: department of commerce in aeronautics. bureau of navigation.

Bureau of standards. see burgess, george k.: department of commerce in aeronautics. the bureau of standards.

- see safety code: aeronautic safety code. tentative american standard.

Burgers, j. m. the motion of a fluid in the boundary layer along a plane

smooth surface.

proceedings of the first international congress for applied mechanics, delft, 1925; delft, 1925, pp. 113-128.

- see biezeno, c. b., and j. m. burgers: proceedings of the first international congress for applied mechanics, delft, 1924; delft, 1925.

Burgess, c. p. forces on airships in gusts.

national advisory committee for aeronautics, report no. 204, jan. 26, 1925, washington, government printing office, 1925, pp. 8.

- the rigid airship zr-3.

journal american society naval engineers, vol. 36, no. 4 (nov. 1924), washington, pp. 553-572, ill.

Burgess, George k. department of commerce in aeronautics. the bureau of standards.

national aeronautic association review, vol. 3, no. 3 (march 1925), washington, d. c, pp. 37-38.

Burke, Newton. airplanes hurled to bits in test. terrific crashes against wall shows faults.

popular science monthly, vol. 106, no. 4 (april 1925), new york, p. 31,

Burma. air surveys in burma.

the aeroplane, ypl 29, no. 17 (oct. 21,1926), london, pp. 482,484.

Burma. See Cochran-Patrick, C. K.: Air surveys in Burma.

- See Surveying: Air surveying 15,000 square miles of forest in Burma.

Burnblli, Vincent. Commercial aviation.

Aero Digest, Vol. 6, No. 3 (Mar. 1925), New York, p. 151.

Burney, C. D. Commander Burney on airships.

The Aeroplane, Vol. 28, No. 18 (May 6, 1925), London, p. 446.

r

- The position of the airship in aerial transport.

Institution of Aeronautical Engineers, Minutes of proceedings No. 15, 24th April 1925, London, pp. 13-26.

Burt, Henry R. Memorial to heroic flyers to be erected in Capital.

TJ. s. Air Services, Vol. 10, No. 1 (Jan. 1925), Washington, p. 30, ill.

Busk, E. T. The late E. T. Busk.

Flight, Vol. 17, No. 51 (Dec. 17, 1925), London, p. 829.

Busk, Mary. E. T. Busk, a pioneer in flight. With a short memoir of H. A. Busk.

London, John Murray, 1925, pp. xi-167, ill.

Butler, Jarvis. The United States aeronautical board and the joint board.

National Aeronautic Association Review, Vol. 3, No. 9 (Sept. 1925), Washington, D. C, pp. 134-136, ill.

Byrd, R.^ E. Flying over the arctic.

National Geographic Magazine, Vol. 48, (Nov. 1925), Washington, pp. 519-532,111.

- Headed for the North Pole.

TJ. s. Air Services, Vol. 10, No. 9 (Sept. 1925), Washington, pp. 42-44, map.

- Navigation problems of the Macmillan expedition.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, pp. 369-394, ill.

C. A. N. T. 10 ter. Prove statiche degli impennaggi dell' idrovolante C. A. N. T. 10 ter (con cabina).

Rend. Teen. Dir. Sup. Genio Costa. Aer., Anno 13, N. 7 (15 Agosto 1925), Roma, pp. 1-3, ill.

C. A. N. T. 12. Prove statiche degli impennaggi dell' idrovolante C. A. N. T. 12.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 7 (15 Agosto 1925), Roma, pp. 3-5, ill.

C. D. The C. D. air express.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, pp. 503-504, ill.

Cabot, Godfrey L. General Mitchell's parting address.

National Aeronautic Association Review, Vol. 3, No. 6 (June 1925), Washington, D. C, pp. 84,87.

- Helium.

Aero Digest, Vol. 6 No. 3 (Mar. 1925), New York, pp. 130-132,168, ill.

- Lessons of the Shenandoah.

Aero Digest, Vol. 7, No. 4 (Oct. 1925), New York, pp. 540, 570, ill.

Caldwell, "Cy." A reliable reliability tour story.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, pp. 487-490, ill.

Caldwell, F. W. See Rackwitz, E.: Die Micarta-Propeller. Nach den Veröffentlichungen von F. W. Caldwell und N. S. Clay.

California. The California "Coupe-Cabin" plane.

Aviation, Vol. 19, No. 25 (Dec. 21,1925), New York, p. 882, ill.

Cambridge Uni\ ersity. On aviation at Cambridge.

The Aeroplane, Vol. 28, No. 18 (May 6, 1925), London, pp. 425-430.

Cameba obscuba. see crowley, j. W., jr., and r. g. freeman: determination of turning characteristics of an airship by means of a camera obscura.

Camichel. applications des lois de similitude à l'étude des phénomènes qui se produisent à l'aval d'un corps immergé dans un fluide visqueux en mouvement.

la techn. aéron., 16e année, n. s., no. 49, 60 (15 nov., 15 déc. 1925), pp. 322-333, 371-381, ill.

Camichel, a., l. EscANns et m. RicAtrn. sur l'écoulement des fluides visqueux autour d'un obstacle.

c. r. acad. sei., t. 180, no. 21 (25 mai 1925), paris, pp. 1557-1559, ill.

Canada. air work in canada.

flight, vol. 17, no. 25 (june 18, 1925), london, p. 378.

- aircraft make good in canada.

flight, vol. 17, no. 8 (feb. 19, 1925), london, pp. 96-97, ill.

—— canada's civil air service.

national aeronautic association review, vol. 3, no. 2 (feh. 1925), washington, d. c, p. 25.

--canadian government requirement for aircraft.

aviation, vol. is, no. 2 (jan. 12, 1925), new york, pp. 49-50, 111.

- civil aviation in canada.

the aeroplane, vol. 28, no. 21 (may 27,1925), london, p. 526. aviation, vol. 18, no. 26 (june 29, 1925), new york, pp. 724-725, ill.

- the 1925 flying program in canada.

the aeroplane, vol. 29, no. 4 (july 22,1925), london, p. 114.

- report on civil aviation 1924.

dominion of canada, department of national defence, ottawa, canada.

- see chicanot, E. l.: into the golden north. air transportation an

essential factor in canadian gold mining.

- see chicanot, E. l. : the romance of canada's first aerial mail.

- see lyons, james: ontario's forest air patrol

- see surveying: aerial surveys in canada.

- see vachon, l: les conditions du travail aérien au canada.

Canadian vickers (ltd). canadian vickers (ltd.).

the aeroplane, vol. 29, no. 16 (oct. 14,1925), london, pp. 456,468, ill.

Cantileveb wings. see thalau, k.: computation of cantilever airplane wings.

Capon, r. s., and a. Lee. preliminary report on the forced oscillations of aircraft compasses.

aeronautics. techn. eep. aer. ees. com., 1923-24, vol. 2, london, 1925, pp 581-589, ills., diagrs. reports and memoranda, no. 874. july 1920. (m.n. 6.)

Capboni. the caproni c. a. so night bomber.

the aeroplane, vol. 29, no. 12 (sept. 16, 1925), london, p. 350, ill.

Cabbttbetobs. british standard method for the calibration of carburetor jets for aircraft and automobile engines.

specifications of the british engineering standards association, no. 5030, june 1925, london, pp. 14, ill.

- see lamé, m.: les carburateurs du salon.

—— see zenith: les carburateurs zenith et les moteurs d'aviation.

Çablieb, Andbé. la photographie aérienne appliquée aux travaux publics. bruxelles, van buggenhoudt, éditeur.

Carlin, J. L. an arduous route. detailed story of the new south african air mail service.

flight, vol. 17, no. 14 (apr. 2, 1925), london, pp. 200-201, map.

- a new air mail. 1,000-mile coastal route in south africa.

flight, vol. 17, no. 7 (feb. 12, 1925), london, p. 82.

Carlsen, h. an investigation of tuchsherer's ring key.

transactions of the central aero-hydrodynamical institute, no. 13, tj. s. s. e. scientific-technical department of the supreme council of national economy, no. 93, moscow, 1925, pp. 62, iii.

Carolin, Norbert. captain carolin on bombing.

aviation, vol. 19, no. 19 (nov. 9, 1925), new york, pp. 672-673, ill.

Carpenter, Ford a. what shall we do with the boy who wants to be an aviator? «

the ace, vol. 6, no. 1 (june 1925), glendale, cal., p. 11.

Carr, Gardner w. production methods and the aircraft industry.

tj. s. air services, vol. 10, no. 7 (july 1925), washington, pp. 37-42, ill.

Carrier pigeons. see kubec, henry: birdmen's birds.

Carriers. aircraft carriers.

aviation, vol. 18, no. 2 (jan. 12, 1925), new york, p. 41.

- airplane carriers. their importance explained.

u. s. air services, vol. 10, no. 3 (mar. 1925), washington, p. 34.

- see airplane carrier.

- see lexington: U. s. s. lexington, great airplane carrier, launched.

- see saratoga: the aircraft carrier saratoga launched.

- see saratoga: our airplane carrier saratoga launched.

- see saratoga: ours is the largest airplane carrier.

Carroll, thomas. spinning.

tj. s. air services, vol. 10, no. 6 (june 1925), washington, pp. 35-38, ill.

Carson, d. b. department of commerce in aeronautics. bureau of navigation.

national aeronatic association review, vol. 3, no. 3 (march 1925), washington, d. c, p. 42.

Case, John. the strength of materials; a treatise ou the theory of stress calculations for engineers.

london and new york, edward arnold & co., longmans, green & co., 1925, pp. viii, 558.

Caspar. the caspar c. J. 14.

the aeroplane, vol. 28, no. 12 (mar. 25 1925). london, p. 288, ill.

- the caspar c17 two-seater light plane.

aviation, vol. 18, no. 5 (feb. 2, 1925). new york, pp. 130-131, ill.

Casse, Gilbert. see bouche, henri: le colonel casse.

Castleman, Jr., r. a. the influence of the degree of instability on the phe-nomina of round liquid columns.

nature, vol. 114, no. 2876 (dec. 13, 1924), london, pp. 857-858, ill.

Cave-Browne-Cave, t. r. the evaporative cooling of aircraft engines. automohile engineer, vol. 15. no 209 (nov. 1925), london, pp. 422-124, ill.

Catgill, l. e. See harris, r. g., and L. E. caygill: further experiments on honeycomb radiators.

Cayley, George. cayley on airships.

journ. roy. aer. soc. vol. 29, no. 170 (feb. 1925). london, pp. 76-92, ill.

- See hegener, henri: de baanbrekers der dynamische luchtvaart vii

george cayley.

Center of pressure. See Royal Aircraft Establishment: Determination of scale effect on the center of pressure of R. A. F. 14, B. E. 2C biplane with three values of stagger.

- See Royal Aircraft Establishment: Report of the design panel on the scale

effect on lift, drag, and centre of pressure of complete aeroplanes.

Central America. See Doyle, Albert H.: Fokker commercial seaplanes blaze new trail through Central America.

Cerrie. "Cerrie."

flight. vol. 17, no. 25 (june 18, 1925), london, p. 378.

Chait, B. A. Le rotor, instrument à progrès, en marge du " Flettner-Rotor. " anvers, impr. anvers-bourse, 1925. pp. 86. 2nd édition.

hampsaur, N. Établissement du circuit du graissage sur avion.

l'aêrotechnique, (l'aéronautique. 7me année, no. 79), 3me année, num. 36 (déc. 1925), paris, pp. 455-160, ill.

Chandler, C. de F. Airships for military purposes.

tj. s. air services, vol. 10, no. 7 (july 1925), washington, pp. 20-25, ill.

- Analyzing the aero controversy.

tf. s. air services. vol. 10. no. 12 (dec. 1925), washington, pp. 13-15.

Chanute field. See Parachute school: Falling a mile for a diploma.

Chatjveatj, B. Électricité atmosphérique.

paris. gaston-doin, 1922-1925, trois fascicules de 102, 272, 250 pages, ill.

Chellgard, W. R. Aircraft's important rôle at Hawaii.

aero digest, vol. 7. no. 3 (sept. 1925), new york. pp. 471-472.

Chemicals. See Antiknock: Engines. Antiknock chemicals.

Chemistry. See Materials and chemistry: Materials and chemistry.

Chenu, A. See Biquard, R., and A. Chenu: Procédé de régénération du gaz des dirigeables évitant leur dégonflement.

Chicago. Disposition of the airplane Chicago.

science, n. s., vol. 62, suppl. 12 (july 31, 1925), garrison.

Chicanot, E. L. Into the golden north. Air transportation an essential factor in Canadian gold mining.

aero digest, vol. 6, no. 1 (jan. 1925), new york, pp. 26-28, ill.

- The romance of Canada's first aerial mail.

tj. s. air services, vol. 10, no. 4 (apr. 1925), washington, pp. 17-19.

China. Chinese aviation.

aviation, vol. 18, no 26 (june 29,1925), new york, p 725.

- Commercial aviation in China.

the aeroplane, vol. 28, no. 13 (apr. 1, 1925), london, pp. 310, 312, ill.

Chollet, Léon. Les étoffes baudruchées en aérostation.

la techn. aéron., 16 année, n. s., no. 39, 40 (15 jan., 15 fév. 1925), paris,' pp. 2-7, 61-62.

Christopperson. See Scott, Wisner Gillette : Christofferson's flight over Mount Whitney.

Chronology. See Jones, Ernest: Chronology of world and American air records. Cierva. L'autogire de la Cierva "C-6 bis."

l'aêrotechnique (l'aéronautique, 7me année, no. 76), 3me année, num. 33 (sept. 1925), paris, p. 342, ill.

■- The Cierva "Autogiro." Noteworthy lecture at the Royal Aeronautical

Society.

flight, vol. 17, no. 44 (oct. 29, 1925), london, pp. 709-711,

Cierva. The evolution of the Cierva "Autogiro."

flight, vol. 17, no. 45 (nov. 5,1925), london, p. 733, ill.

- A new type of flying machine. The Cierva "Autogiro" demonstrated at

Farnborough.

flight, vol. 17, no. 43 (oct. 22, 1925), london, pp. 683-687, ill.

Cierva, Juan de la. Come ho concepito 1"'Autogiro."

l'ala d'ltalia, anno 4, n. 10 (ott. 1925), roma, pp. 356-359, ill.

- Comment j'ai conçu l'autogire.

l'aérotecnniqua, (l'aéronautique, 7me annéa, no. 71), 3ma année, num. 28 (avril 1926), paris, pp. 135-140, ill.

--■ De la Cierva Autogiro achieves more success.

aviation, vol. 19, no. 20 (nov. 16, 1925), new york, pp. 711-712, ill.

- See Autogiro: Meet the autogiro.

- See Autogiro: A new type of airplane.

- See McLaughlin, George F.: The La Cierva "Autogiro."

Cirrus. The "Cirrus" engine.

aviation, vol. 18, no. 13 (mar. 30, 1925), new york, p. 353, ill.

- The 60 H.P. "Cirrus" light plane engine.

flight, vol. 17, no. 9 (feh. 26, 1925), london, pp. 107-109, ill.

Cisler, S. A. S. A. Cisler new air mail superintendent.

aviation, vol. 19, no. 20 (nov. 10, 1925), new york, p. 712, ill.

Cisotti, U. Sur les mouvements de rotation d'un liquide visqueux.

proceedings of the first international congress for applied mechanics delft 1924, delft 1925, pp. 372-373.

Civil aviation. Civil aviation statistics.

aviation, vol. 18, no. 18 (may 4, 1925), new york, p. 495.

—— De lessen van een zesjarige ervaring in luchtverkeer.

hat vliegveld, 9da jaarg., no. 12 (dec. 1925), amsterdam, pp. 324-326.

- The lessons of six years' experience in air transport.

aviation, vol. 19, nos. 24-25 (dec. 14-21, 1925), new york, pp. 838-841, 876-878, ill.

- On civil aviation and service efficiency.

tha aaroplane, vol. 29, no. 4 (july 22, 1925), london, pp. 105-106.

- Progress of civil aviation. Annual report on the period April 1, 1924, to

March 31, 1925.

flight, vol. 17, no. 41 (oct. 8, 1925), london, pp. 655-656.

- A report by the Joint Committee on Civil Aviation of the United States

Department of Commerce and the American Engineering Council.

london, mcgraw-hill publishing co., 1926, pp. xvii, 189, ill.

-- See Commercial aeronautics.

- See Dévaluez: Le recrutement et la formation du personnel navigant de

l'aéronautique civile.

- See Duval, A.-B.: Le point de vue du passenger en aéronautique marchande.

- See Edge, S. F. : On traveling by air.

- See Gadolin, C. A. J. : The possibilities of civil air traffic in Finland.

- See Germany: Progress of civil aviation in Germany.

-- See Grey, Charles Grey: Civil aviation in the United States.

- See Kop, F. H. van der: De mogelijkheden van het Finsche luchtverkeer,

-- See Tizard, H, T.: Is civil aviation a luxury? Is flying unsafe?

Civil aviation. See Transportation: The cost of air transport.

Civil Service Commission. See Deming, William C: Civil Service Commission aeronautics.

Civil War. See Jones, Ernest: Our air force in the Civil War.

Civita, T. Levi. La détermination rigoureuse des ondes permanentes d'ampleur finie.

proceedings of the first international congress for applied mechanics, delft 1924, delft, 1925, pp. 129-145.

Clark, B. D., L. P. Coombes, H. Glättest and A. S. Hartshorn. Lift and drag of Junker monoplane. Comparison of model with full-scale results. aeronautical research committee, reportsand memoranda, no. 945 (ae. 165.), novemher 1924, london, 1925, p. 10, ill.

Clark, B. D. See Kermode, A. C, D. B. Clark, and R. G. Harris: Full scale and model measurements of pressure distribution round two ribs of a B. E. 2E aeroplane with R. A. F. 19 section.

Clausen. Verkehrsflugzeuge und Luftverkehr.

zeitschr. ver. deutsch. ing., bd. 69 (19. dez. 1925), berlin, pp. 1599-1600.

Clay, N. S. See Rackwitz, E.: Die Micarta-Propeller. Nach den Veröffentlichungen von F. W. Caldwell und N. S. Clay.

Clerget, P. Nouvelles recherches sur les origines du moteur à combustion: Le moteur des Frères Niepce (1806).

la techn. aeron., 16e année, n. s., no. 41,42 (15 mars, 15 avril 1925), paris, pp. 92-93,98-118 ill.

- Reconstitution du moteur à explosion des frères Niepce de 1806.

c. r. acad. sei., t. 180, no. 12 (23 mars 1925), paris, pp. 905-908, ill.

Clifford, G. H. W. See Pippard, A. J. Sutton, and G. H. W. Clifford: An experimental investigation into the properties of certain framed structures having redundant bracing members. Report No. 2.

- See Pippard, A. J. Sutton, and G. H. W. Clifford: An experimental

investigation into the properties of certain framed structures having redundant bracing members. Report No. 3.

Clouds. See Solberg, H., et Carl Stürmer: Méthode pour la mesure photo-grammétrique des nauges pendant la nuit, quand des nuages sont éclairés par la luue ou par la lumière crépusculaire.

--See Stewart, C. D.: The measurement of upper wind velocities by observations of artificial clouds.

Coast and Geodetic Survey. See Jones, E. Lester: Department of Commerce in Aeronautics. Coast and Geodetic Survey.

Cobham, Alan J. Alan Cobham's Everest flight.

flight, vol. 17, no. 6 (feb. 5, 1925), london, p. 70.

- The lesson of the journey to India.

the aeroplane, vol. 28, no. 25 (mar. 25, 1925), london, p. 276.

--London, Rangoon, and way stations by air.

literary digest, vol. 85, no. 4 (apr. 25,1925), new york, pp. 58-65, ill., map.

- My 17,000 miles flight in a D. H. 50.

flight, vol. 17, no. 13 (mar. 26, 1925), london, pp. 179-188, ill., map.

- The reliability of aircraft.

the aeroplane, vol. 28, no. 18 (may 6, 1925), london, pp. 432, 434.

- See Brancker, Sefton: Sir Sefton Brancker's air tour. Alan Cobham

again makes good.

Cobham, Alan J. See London: London-Zurich and back on a light 'plane Alan Cobham's fine performance on a D. H. Moth.

- See London-Cape Town: The London-Cape Town imperial airway survey flight.

Cochran-Patrick, C. K. Air surveys in Burma.

flight, vol. 17, no. 45 (nov. 5, 1925), london, pp. 734-735.

journ. boy. aer. soc, vol. 29, no. 180 (dec. 1925), london, pp. 603-633, ill.

Cocklin, Henry S. Development of Navy patrol planes.

aero digest, vol. 6, no. 5 (may 1925), new york, pp. 242-244, 280, ill.

Code international. See Imbrecq, J.: La preparation du Code International de l'air; le congres de Lyon.

Colepax, Henry Arthur. See Great Britain, Air Ministry: Report of the formal investigation of the accident to the aircraft G—EBBX at Croydon on the 24th December, 1924, held under the Air Navigation (investigation of accidents) regulations, 1922.

Coleman, Charles H. Defending the Schneider Cup.

aero digest, vol. 7, no. 4 (oct. 1925), new york, pp. 538-539, ill.

- Given up as lost, Navy Hawaiian flight plane found after nine days.

u. s. air service, vol. 10, no. 10 (oct. 1925), washington, pp. 14-18, ill.

- Navy planes back from the Arctic.

u. s. air services, vol. 10, no. 11 (nov. 1925), washington, pp. 24-27, ill.

- The two-thousand-mile flight of Navy planes from San Francisco to

Honolulu.

u. s. air services, vol. 10, no. 9 (sept. 1925), washington, pp. 13-17, ill.

Collins, F. A. Over South America. A commercial air route of rare beauty

aero diäest, vol. 6, no. 3 (mar. 1925), new york, pp. 142-143, 172, ill.

Collins, F. L. Why do we stay on the ground? In America we talk, in Europe they fly.

collier's, vol. 75 (mar. 21, 1925), springfield, ohio, p. 9, ill.

Colombia. See Bauer, Peter Paul von: Commercial aviation in Colombia.

Colvin, Charles H. The pioneer earth inductor compass.

slipstream monthly, vol. 6, no. 11 (nov. 1925), dayton, ohio, pp. 25-26, ill.

Commercial aeronautics. Awaiting the flivver airplane.

beview ol reviews, vol. 71 (june 1925), new york, pp. 648-649, ill.

- Big business in the air.

literary digest, vol. 86, no. 9 (aug. 29, 1925), new york, pp. 8-9, ill.

- Business by air.

outlook, vol. 141 (nov. 4, 1925), new york, pp. 336-337.

-- Civilian aircraft problem.

nation, vol. 121 (dec. 16, 1925), new york, p. 695.

- Close view of continental air development.

aviation, vol. 19, no. 10 (sept. 7, 1925), new york, pp. 276-278, ill.

- Commerce in air encouraged by postal service.

sunset, vol. 54 (june 1925), san francisco, p. 44, ill.

- Commercial aviation abroad.

national aeronautic association review, vol. 3, no. 2 (feb. 1925), washington, d. c, p. 23.

- Die Deutsche Verkehrsausstellung. Raum 9. Luftverkehr und Statistik.

zeitscnr. flugt. mot., 16. jahrg., 17. u. 18. heft (9. sept. 1925), münchen, pp. 363-368, ill.

Commercial aeronautics. Expansion of air transport interests. Spreading growth of the highway air landing movement.

the ace, vol. 7, no. 3 (dec. 1925), glendale, cal., pp. 7,13.

- Fact-finding commission conducting world survey of commercial aviation.

tj. s. air services, vol. 10, no. 9 (sept. 1925), washington, pp. 11-12.

- For navigation by air.

outlook, vol. 140 (may 13, 1925), new york, p. 45.

- Hawa filotï dostlari gämyiiätl jaoäikälärl qüramasiniü dojep jollari.

taschkent, 1925, pp. 15.

- How the War Department retards Aying.

aviation, vol. 18, no. 19 (may 11, 1925), new york, p. 523.

- Navigation aérienne commerciale.

l'aérophile, 33e année, nos. 1-2 (ler-15 jan. 1925), paris, pp. 14-15.

- New Travel Air commercial plane.

aviation, vol. 18, no. 15 (apr. 13, 1925), new york, p. 406, 111.

- Now for the flying flivver.

literary digest, vol. 85 (apr. 25,1925), new york, pp. 12-13, ill.

- On evil communications and bad manners.

the aeroplane, vol. 29, no. 3 (july 15, 1925), london, pp. 77-84.

- On the reward of virtue.

the aeroplane, vol. 29, no. 20 (nov. 11,1925), london, pp. 549-554, ill.

- Our future lies in commercial aviation.

scientific american, vol. 133 (dec. 1925), new york, p. 372.

- The position of the airship in aerial transport.

flight, vol. 17, no. 18 (apr. 30, 1925), london, pp. 262-263.

- A proposed American air line.

aviation, vol. 18, no. 20 (may 18, 1925), new york, p. 549,

- Railroads facing air rivalry.

literary digest, vol. 86 (sept. 26,1925), new york, pp. 66-69.

- De toekomst van het luchtverkeer met bestuurbare luchtschepen.

het vliegveld, 9de jaarg., no. 8 (aug. 1925), amsterdam, pp. 216-218.

- Ündäu dagladi.

taschkent, 1925, p. 18.

- United States Congress. House Committee on Interstate and Foreign

Commerce. Report to accompany civil air navigation bill, S. 76. (68th Cong., 2d sess., H. Rept. 1262). x

washington, supt. docs., 1925, pp. 26.

- United States Congress. Senate Committee on Commerce. Report to

accompany S. 41, Promotion of commercial aviation. (69th Cong., 1st sess., S. Rept. 2.)

washington, supt. of docs., 1925, pp. 8.

■-• A word survey of commercial aviation.

aviation, vol. 19, no. 21 (nov. 23, 1925), new york, pp. 752-753.

- World commercial aeronautics.

national aeronautic association review, vol. 3, no. 4 (april 1925), washington, d. c, pp. 54-55, map.

See Aero-Lloyd: Deutscher Aero-Lloyd A.-G.

Commercial aeronautics. See Austin, 0. P.: Significance of the globe flight from a commercial standpoint.

- See Bauer, Peter Paul von : Commercial aviation in Colombia.

- See Black, Archibald: Air-line investment and operating costs.

- See Black, Archibald: The fourth arm of transport.

- See Brancker, William Sefton: Commercial aviation.

- See Brancker, William Sefton: The lessons of six years' experience in air

transport.

- See Breuer, R.: Der deutsche Luftverkehr in Jahre 1925.

-- See Brilioth, Börje: Swedish airmindedness.

-- See Bryan, Leslie Aulis: Aerial transportation.

- See Burnetii, Vincent: Commercial aviation.

- See China: Commercial aviation in China.

- See Civil aviation.

- See Cobham, Alan J.: London, Rangoon, and way stations by air.

- See Collins, F. A. : Over South America. A commercial air route of rare

beauty.

- See Comoz, Pierre: La situation des compagnies françaises de navigation

aérienne à la fin 1924.

- See De Havilland: New De Havilland air liner. D. H. 54, with Rolls-Royce "Condor," to carry 14 passengers.

- See Design: Improvements in commercial airship design.

- See Perndon, William S.: Financing commercial aviation.

- See Fisher-Poturzyn, Frederick A.: Uber den Weltluftverkehr und ewro-

päiche Luftverkehrsprobleme.

- See Focke-Wulf: The Focke-Wulf type A. 16. An interesting German

commercial aeroplane.

- See Germany: Enkele beschouwingen over het Duitsche luchtverkeer.

- See Germany: Progress of commercial aviation in Germany.

- See Gillman, H. R.: Carrying goods by air.

- See Great Britain, Air Ministry: Report of the formal investigation of the

accident to the aircraft G-EBBX at Croydon on the 24th December, 1924, held under the Air Navigation (investigation of accidents) regulations, 1922.

-- See M. L. : Après le concours des hydravions de transport.

- See M. L.: Le concours d'hydravions de transport.

- See McLeod, Clarence: Bill to aid commercial aviation.

- See Marieni, G.: La navigazione aerea commercial.

-- See Mars, James A.: Government must encourage commercial aviation.

- See Orlovius: Die Bedrohung des deutschen Flugverkehrs.

- See Reyneker, F. H.: Hct Farman "Jabiru" verkeersvliegtuig.

- See Reyneker, F. H.: Het Focke-Wulf verkeersvliegtuig, type A 16.

- See Rodda, Douglas W.: Commercial aviation and insurance.

- See Sândorfi, Kamill : A legi közlekedes Joga.

Commercial aeronautics. see seilkopf, heinrich: meteorologische studienfahrten über den atlantik und die meteorologische beratung transatlantischen luftverkehrs.

- see seilkopf, heinrich: uber luftverkehrsunfalle.

- see sikorsky: the sikorsky s. 29a commercial biplane.

- see snijders, c. j. : de toekomst van het luchtverkeer met nederlandsch-

indië.

- see van zandt, j. parker: european commercial aeronautics.

- See van zandt, j. parker: preliminary report on british commercial

aeronautics.

- see van zandt, j. parker: report on commercial air transportation

activities in england, france, germany and holland. prepared for the united states army air service.

- see verdurand, abel: quelques conditions de bon rendement des avions

commerciaux.

- See verdurand, abel, et henri bardel: l'utilisation des parachutes dans

l'aviation commerciale.

- see wicherlink, w. h.: nederland en het europeesche luchtverkeer.

Commercial design. see korvin-kroukovsky, b. v.: some technical aspects

in commercial design at the air meet. Commission for the exploration of the upper air. 1925 london. commission for the exploration of the upper air.

air ministry, meteorological office, reports ol international meteorological meetings, no. 281, 1925, london.

Commission internationale de navigation aérienne.

bulletin official no. 8 juin 1925, paris, pp. 92. bulletin official no. 9, dec. 1925, paris, pp. 96.

Comoz, Pierre. la situation des compagnies françaises de navigation aérienne à la fin 1924.

l'aéronautique. 7me année, no. 69 (fév. 1925), paris, pp. 70-71.

Compagnie internationale de navigation aérienne.

guide de la compagnie internationale de navigation aérienne, p. 87.

Compasses. the new pioneer earth inductor compass.

aviation, vol. 18, no. 23 (june 8, 1925), new york, p. 643, ill.

- radio compass to guide airmen through cloud and fog.

aero digest, vol. 6, no. 1 (jan. 1925), new york, p. 50.

- See air ministry laboratory: tests on improved models of aircraft

compasses.

- see capon, r. s., and a. lee: preliminary report on the forced oscillations

of aircraft compasses.

--See colvin, charles h.: the pioneer earth inductor compass.

- see rowe, a. p.: the northerly turning error of compasses in aircraft.

- see thoma, d. : beitrag zur theorie der kompassstörungen.

Comper, n. some considerations in the design of a light aeroplane.

journ. roy. aer. soc, vol. 29, no. 173 (may 1925), london, pp. 240-244.

Compton. airplane. story of the birdman. the soaring motor car of the air.

compton's pictured encyclopedia, vol. 1, a-bro., chicago, f. e. compton & company, c1922, pp. 54-68, 111.

Compton. balloon. flying gas bags from montgolfier to zeppelin.

compton's pictured encyclopedia, vol. 1, a-bro., chicago, e. f. compton & company, c1922, pp. 310-321, ill.

Conférence Internationale de Droit. La Conférence Internationale de Droit privé aérien.

l'aêrophile, 33e année, nos. 21-22 (ler-15 nov. 1925), paris, p. 342.

Congo. See Brussels-Congo flight.

Congrès international de Législation Aérienne. Sixième Congrès international de Législation Aérienne. Rome, 21-26 avril 1924. paris, per orbem, éditeur.

Congrès International de Navigation Aérienne. Le 3e Congrès International de Navigation Aérienne.

l'aêrophile, 33e année, nos. 21-22 (ler-15 nov. 1925), paris, pp. 334-336.

Congress. See Applied Mechanics: Proceedings of the First International Congress for Applied Mechanics, Delft, 1924; Delft, 1925.

Constant, P. Cours d'astronomie et de navigation à l'usage des marins. paris, gauthier-villers.

Contracts. $7,500,177.42 contracts with the industry.

aviation, vol. 18, no. 20 (may 18, 1925), new york, p. 544.

Control. Control at stalling speed. Last week's demonstration at Croydon.

flight, vol. 17, no. 17 (apr. 23,1925), london, pp. 239-244, ill.

- The control of stalled aeroplanes.

the aeropiene, vol. 29, no. 25 (dec. 16, 1925), london, p. 702. flight, vol. 17, no. 50 (dec. 10,1925), london, p. 811.

- Self-balanced airplane.

literary digest, vol. 85 (june 13,1925), new york, pp. 65-66.

- See Stability: Aerodynamics. Stability and control.

Control movements. See Jones, D. A., and H. L. Stevens: The Royal Aircraft Establishment control movement recorder, Mark III.

Coolidge, Calvin. President Coolidge on air defense.

aviation, vol. 19, no. 25 (dec. 21,1925), new york, p. 875.

Coolidge, Mrs. Calvin. See Horsfall, Jessie E.: The "Los Angeles". Mrs. Calvin Coolidge presides over America's most impressive naturalization ceremony.

Coombes, L. P. See Bradfield, F. B., and L. P. Coombes: Autorotation measurements on a model aeroplane with zero stagger.

- See Clark, B. D., L. P. Coombes, H. dauert and A. S. Hartshorn: Lift

and drag of Junker monoplane. Comparison of model with full-scale results.

Coppa d'Italia. The Coppa d'Italia.

flight, vol. 17, no. 49 (dec. 3, 1925), london, p. 798, ill.

Corbett, A. J. An early airship flight.

the aeroplane, vol. 28, no. 15 (apr. 15,1925), london, pp. 352, 354.

Cornet, C. Cosmographie et navigation. paris, gauthier-villars, 1925.

première partie: pp. 350, ill; deuxième partie pp. 234, 111. troisième partie.

Cornides. Die Deutsche Verkehrsausstellung. Raum 5. Luftfahrtliteratur. zeitschr. flugt. mot., 16. jahrg., 17.u.18. heft (9 sept. 1925), münchen, p. 337.

Corouge, André. See Blanchet, Georges: Aviateurs contemporains. André Corouge et Louis Macheny.

Corps-Observation competition. Corps observation plane competition completed.

aero digest, vol. 6, no. 3 (mar. 1925), new york, pp. 138-139,168, 111. 53466—28-4

Cost. Air transport, costs.

Aviation, Vol. 19, No. 1 (July 6, 1925), New York, p. 11.

- On costs and values.

The Aeroplane, Vol. 29, No. 24 (Dec. 9, 1925), London, pp 660-668, ill.

:—r-i A reason why aircraft cost so much.

Aviation, Vol. 18, No. 13 (Mar. 30, 1925), New York, p. 345, chart.

Costanzi, Giulio. Sulla nazionalizzazione della produzione aeronautica.

, . .Rivista Aeronautica, Anno 1, N. 4 (Ott. 1925), Roma, pp. 1-39.

Couannier, Henry. Légitimité de la guerre aérienne, opinions recueillies. Paris, Per Orbem, éditeur, pp 244.

Cotjhé, Louis. Y a-t-il une crise de pilotes?

L'Aérophile, 33o année, Nos. 15-16 (ler-15 août 1925), Paris, pp. 233-237.

Coupet, L. See Bajac, R., et L. Coupet: Impressions personnelles de pilotes de lignes.

Cousin. Definition et étude de la perte de vitesse au point de vue du pilotage et au point de vue aérodynamique.

La Techn. Aeron., 16e année, n. s., No. 43 (15 mai 1925), Paris, pp. 130-135, ill.

- Le pilotage des avions modernes. Role des instruments de bord.

La Techn. Aeron., 16e année. No. 43 (15 mal 1925), Paris, pp. 150-157.

Cousin, Jacques. Le chronométrage des avions au voisinage du sol.

l'Aérotechnique (L'Aéronautique, 7me année, No. 74), 3me année, Num. 31 (juil. 1925), Paris, pp. 260-262, ill.

- See Hirschauer, L. : Note sur le chranométrage des avions.

Cowley, W. L., A. G. Gadd, L. ,1. Jones and Sylvia W. Skan. Biplane investigation with R. A. F. 15 section. Part III. Tests at various staggers and gap chord ratios.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 148-160, ills., diagrs., tabls.

Cowley, W. L., and L. J. Jones. An experimental test of the Prandtl correction for tunnel wall interference.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol 2, London, 1925, pp. 538-541, diegrs., tabls.

Reports and Memoranda, No. 398. 3 anuary, 1924. (Ae. 128.)

Cowley, W. L. A note on the Katzmayr effect; that is, the effect on the charac-istics of an aerofoil produced by an oscillating air stream.

Aeronautical Research Committee, Reports and Memoranda, No. 969, (Ae. 185), March, 1925, London, 1925, pp. 5, diagrs.

Cox, A. B. New theory of fluid flow.

Journ. Frankl. Inst., Vol. 198 (Dec. 1924), Philadelphia, pp. 769-793.

Cox-Klemin. Cox-Klemin mail plane. The Nighthawk.

Aero Digest, Vol. 6, No. 6 (June 1925), New York, p. 315, ill.

Cram, Ralph W. American aviation's greatest year.

Aero Digest, Vol. 7, No. 4 (Oct. 1925), New York, pp. 519-520, 568, ill.

- An aerial vacation. Being the impressions of an amateur aviator.

Aero Digest, Vol. 6, No. 2 (Feb., 1925), New York, pp. 76-78, ill.

—— Ultimate airways.

Aero Digest, Vol. 7, No. 2 (Aug., 1925), New York, pp. 413-415, 450, ill., map.

Cranwell. The Cranwell C. L. A. 3 light monoplane. Bristol "Cherub" engine.

Flight, Vol. 17, No. 31 (July 30, 1925), London, pp. 484-487, 111., diagr.

Crocco, g. Arturo. alcune idee moderne sulla resistanza delle carene.

eivista aeronautics, anno 1, n. 1 (luglio 1925), roma, pp. 55-68, ill.

Cronstedt, Val. the imperial air way. paris—london—amsterdam by air, july 20-23, 1925.

the aeroplane, vol. 29, no. 7 (aug., 12, 1925), london, pp. 204, 206.

Crop dusting. See riis, roger william: commercial crop dusting.

Crosara, Leonardo. gli aerostieri.

stabilimento pollgraflco editoriale.

Crowley, j. w., jr., and k. m. Ronan. characteristics of a single float sea. plane during take-off.

national advisory committee for aeronautics, report no. 209, april 24, 1925, washingt on, government printing office, 1925, pp. 11, ill., diagrs.

Crowley, j. w., jr., and r. g. Freeman. determination of turning characteristics of an airship by means of a camera obscura.

national advisory committee for aeronautics, report no. 208, june 5, 1925, washington, government printing office, 1925, pp. 8, ill.

Croydon. the croydon accident. official report.

plight, vol. 17, no. 7 (feh. 12, 1925), london, pp. 83-85

- on the croydon accident.

the aeroplane, vol. 28, no. 7 (feb. 18, 1925), london, pp. 141-144.

- See control: control at stalling speed. last week's demonstration at

croydon.

- See delalande, p.-j.: l'accident de croydon.

Curry, john f. mccook field accomplishments of past years.

slipstream, vol. 6, no. 3 (mar. 1925), dayton, ohio, pp. 27-30, ill.

Curtiss. curtiss building new commercial ship.

aviation, vol. 18, no. 25 (june 22, 1925), new york, pp. 693-694, ill., chart.

- curtiss building new popular-priced commercial ship.

tj. s. air services, vol. 10, no. 7 (july 1925), washington, p. 50, ill.

- the curtiss carrier pigeon.

aviation, vol. 18, no. 12 (mar. 23, 1925), new york, pp. 318-319, ill.

- the curtiss carrier pigeon. a new machine built specially for overnight

air mail service.

flight, vol. 17, no. 16 (apr. 16, 1925), london, pp. 22s-229, ill.

- curtiss financial statement.

aviation, vol. 18, no. 13 (mar. 30, 1925), new york, p. 346.

- the curtiss "lark" ox 5.

slipstream, vol. 6, no. 7 (july 1925), dayton, ohio, pp. 15-16, ill.

- flight tests of the new curtiss racer.

aviation, vol. 19, no. 13 (sept. 28, 1925), new york, pp. 383-384.

- new american commercial aircraft.

the aeroplane, vol. 28, no. 23 (june 10, 1925), london, pp. 578, 580, ill., diagr.

- new curtiss mail plane. the carrier pigeon.

aero digest, vol. 6, no. 3 (march 1925), new york, pp. 144-145,170, ill.

- les nouveaux curtiss de vitesse.

l'aêrotechnique (l'aéronautique, 7me année, no. 79), 3me année, num. 36 (dec. 1925), paris, p. 453, ill.

Curtiss, Glenn. See mason, wilmer g.: glenn curtiss predicts.

Curtiss-Rbed. See Propellers : Development of Curtiss-Reed duralumin propeller. Cylinder gauge. See Subito: The "Subito" cylinder gauge. Cylinders. Rotating cylinders.

flight, vol. 17, no. 2 (jan. 8, 1925), london, pp. 13-14.

- See Frazer, R. A.: On the motion of circular cylinders in a viscous fluid.

- See Howland, R. C. J.: Vortex motion behind a circular cylinder.

- See Lock, C. N. H.: On the system of vortices generated by a circular

cylinder in steady motion through a fluid.

- See Low, A. R.: The reaction of a stream of viscous fluid on a rotating

circular cylinder.

- See Nukiyama, D.: On the attraction between two rotating parallel cylinders in some viscous liquids.

- See Reid, Elliott G.: Tests of rotating cylinders.

- See Reif, E. F., and L. F. G. Simmons: On the frequency of the eddies

generated by the motion of circular cylinders through a fluid.

- See Wings: Preliminary study of the influence of a rotating cylinder on a

wing.

Czechoslovakia. See W., F.: Flugzeugbau in der Tschechoslovakei. Aero-Flugzeuge.

D

D., Ch. L'exposition des avions sanitaires.

l'aéronautique, 7me année, no. 73 (juin 1925), paris, pp. 233-234, ill.

DA. See Raffaelli, Italo: Progetto di massima di turbo-motore di aviazione DA 450 HP.

DH54. New English passenger machine, the DH54.

aviation, vol. 19, no. 10 (sept. 7, 1925), new york, p. 279, ill.

Dagnatjx. See Blanchet, Georges: Aviateurs contemporains. Commandant Dagnaux.

Daily Mail. Light aeroplane competition, 1926, for prizes amounting to £5,000 presented by the proprietors of the Daily Mail.

flight, voi. 17, no. 41 (oct. 8,1925), london, p. 650.

--A new Daily Mail £5,000 aviation prize. A contest for light planes

next year.

flight, vol. 17, no. 24 (june 11, 1925), london, p. 361.

Daimler. The Daimler light plane L20.

aviation, vol. 19, no. 4 (july 27, 1925), new york, p. 99, ill.

Dakar. La préparation technique du raid de Dakar.

l'aérotechnique (l'aéronautique, 7me année, no. 70), 3me année, num. 27 (mars 1925), paris, pp. 95-98, diagrs.

Damblanc, Louis. Sur un dispositif applicable aux moteurs d'aviation pour rédure les pertes de puissance en altitude.

c. r. acad. sei., t. 180, no. 15 (14 avril 1925), paris, pp. 1161-1164, ill.

Damping. See Gates, S. B., and H. M. Garner: A theory of the full-scale determination of damping in roll.

Dane, Roger. Midnight suns of the air mail.

aero digest, vol. 7, no. 1 (july 1925), new york, pp. 369-360, ill.

Danzig. See or.: danzig-stockholm.

Davis, Charles. airports for national highways.

the ace, vol. 6, no. 2 (july 1925), glendale, cal., pp. 8-9, 111.

Dawlet, e. r. full-scale wind tunnel.

aviation, vol. 19, no. 8 (aug. 24, 1925), new york, p. 212, ill.

Day, William Conway. See desert: an air tragedy of the desert.

De Havilland. the d. h. 54.

the aeroplane, vol. 28, no. 10 (mar. 11, 1925), london, pp. 230-234, ill.

- the de havilland moth.

the aeroplane, vol. 29, no. 10 (sept. 2,1925), london, p. 292. aviation, vol. 18, no. 19 (may 11, 1925), new york, p. 523, ill.

- the de havilland moth (a practical light aeroplane).

the aeroplane, vol. 28, no. 9 (mar. 4, 1925), london, p. 204, ill.

--the de havilland moth. 60-horsepower "cirrus" engine.

flight, vol. 17, no. 10 (mar. 5, 1925), london, pp. 126-129, ill., diagr.

--new de havilland air liner. d. h. 54, with rolls-royce "condor," to

carry 14 passengers.

flight, vol. 17, no. 6 (feh. 5,1925), london, pp. 66-68, ill., diagrs.

- new de havilland passenger machine.

flight, vol. 17, no. 26 (june 25,1925), london, pp. 389-392, ill., dlagr.

- the passing of the de havillands.

aviation, vol. 18, no. 26 (june 29, 1925), new york, pp. 730-731.

- two new de havilland machines.

flight, vol. 17, no. 1 (jan. 1, 1925), london, p. 8, ill.

- See mclaughlin, george f.: de havilland moth.

Delalande, p.-J. l'accident de croydon.

l'aéronautique, 7me année, no. 69 (lev. 1925), paris, pp. 71-72.

- les moteurs à huile lourde beardmore.

l'aérotechniqne (l'aéronautique, 7me année, no. 71), 3me année, num. 28 (avril 1925), paris, p. 133,111.

Delanghe, g. l'aérodynamique des cylindres tournants.

la techn. aéron., 16e année, n. s., no. 50 (15 dêc. 1926), paris, pp. 354-370, 1u.

- les théories de l'aérodynamique moderne.

génie civil, t. 86, nos. 18, 19 (2-9 mai 1925), paris, pp. 425-433, 453-457, ill.

Deming, William c. civil service commission aeronautics.

national aeronautic association beview, vol. 3, no. 5 (may 1925), washington, d. c, pp. 73-74.

Demuyter, Ernest. la navigation aérienne et les randonnées victorieuses du belgica.

bruxelles, expansion belge, édit.

Department of aeronautics. proposal to create a department of aeronautics, with digest of the curry bill.

congressional digest, vol. 4, (apr. 1925), washington, pp. 232-233.

- should the united states create a federal department of aeronautics?

pro and con.

congressional digest, vol. 4, (apr. 1925), washington, pp. 234-247.

Department of agriculture. See gore, howard m.: aircraft and the department of agriculture.

Department of the treasury. department of the treasury in the air. national aeronautic association eeview, vol. 3, no. 5 (may 1925), pp. 72-73.

Desaleux, A. Cours d'aviation destiné aux élèves-pilotes et mécaniciens. Paris, Gauthier-Villars et Cie., 1925, pp. 246.

Deschiens, Maurice. Aviation dopes or varnishes.

Chemistry and Industry, Vol. 44, No. 37 (Sept. 11, 1925), London, pp. 902-907.

- Le problème des enduits en aviation.

La Techn. Aéron., 16e année, n. s., No. 46 (15 août 1925), Paris, pp. 238-245.

Desert. An air tragedy of the desert.

Flight, Vol. 17, No. 12 (Mar. 19, 1925), London, p. 156.

Design. Aerodynamics. Design.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, p. 24.

- Improvements in commercial airship design.

Aviation, Vol. 18, No. 8 (Feb. 23, 1935), New York, pp. 216-217.

- Lessons in aircraft design from a structural engineer.

The Aeroplane, Vol. 28, No. 5 (Feb. 4, 1925), London, pp. 104-108, ill.

- See: Comper, N.: Some considerations in the design of a light aeroplane.

Designation. See Insignia: Designation of airplanes.

Detonation. Engines. Detonation in flight.

Aeronautics. Techn. Rep. Aer. Res. Com. 1923-24, Vol. 1, London, 1925, p. 29.

- See Fenning, R. W.: Air-hydrogen explosions in closed vessels.

Detroit. Detroit's ambitous aeronautical program.

Aviation, Vol. 18, No. 17 (Apr. 27, 1925), New York, p. 461.

Deutsch Rundflug. The Deutsch rundflug.

The Aeroplane, Vol. 28, No. 16 (Apr. 22, 1925), London, pp. 388, 390, map.

Deutscher Rundflug. "Deutscher Rundflug, 1925." A wonderful German competition.

Flight, Vol. 17, No. 18, (Apr. 30, 1925), London, pp. 257-259, map.

- Facts about the Rundflug.

The Aeroplane, Vol. 28, No. 23 (June 10, 1925), London, p. 572, map.

- On the German Rundflug.

The Aeroplane, Vol. 28, Nos. 23-24 (June 10-17,1925), London, pp. 557-570, 686-594, ill.

- Rundflug competitors.

The Aeroplane, Vol. 28, No. 24 (June 17, 1925), London, pp. 604, 606, ill.

Dévaluez. Le recrutement et la formation du personnel navigant de l'aéronautique civile.

La Techn. Aeron., 16e année, n. s., No. 39 (15 ian. 1925), Paris, pp. 23-30

Dewoitine. Dewoitine-Eindecker—D-7.

Luftfahrt, Bd. 28, Nr. 2 (15. Febr. 1924), Berlin, pp. 24-26, ill.

- See Paris: Air Liners at the Paris aeronautic salon. Three Latecoere

planes compared and Dewoitine D14 described.

Diaphragms. See Eaton, H. N., and C. T. Buckingham: Nonmetallic diaphragms for instruments.

Diehl, Walter S., and E. P. Leslet. The reduction of airplane flight test data to standard atmosphere conditions.

National Advisory Committee for Aeronautics, Report No. 216, Aug. 1, 1925, Washington Government Printing Office, 1926, p. 18, diagrs.

Diehl, Walter S. Standard atmosphere—tables and data.

National Advisory Committee for Aeronautics, Report No. 218, Oet. 25, 1925, Washington, Government Printing Office, 1926, p. 2S, tabls.

Pietrich-Gobiet. Das neue Dietrich-Gobiet-Schulflugzeug.

Aut. Mot. Flugw., 7. Jahrg., Nr. 5 (15. März 1925), Berlin, pp. 134-135, ill.

Dietzius, Robert. Die Genauigkeit der trigonometrisch bestimmten Ballonhöhen und Steiggeschwindigkeiten.

Beiträge zur Physik der freien Atmosphäre, 5. Band, Heft 1, Leipzig, [n. dj, pp. 111-131.

-—• Zur Fälschung der Bahnen von Pilotballonen durch vertikale Luftströmungen.

Beiträge zur Physik der freien Atmosphäre, 6. Band, Heft 2, Leipzig, [n. d.-],pp. 49-72. diagrs.

Dijon. The Dijon aerial lighthouse.

Flight, Vol. 17, No. 18 (Apr. 30,1925), London, p. 264, ill.

Dirigibles. Can huge dirigibles supplant our expresses and liners.

Literary Digest, Vol. 84, No. 2 (Jan. 10, 1925), New York, pp. 52-56, ill. .. "

- See Airships.

- Les dirigibles.

L'Aérophile, 33e année, Nos. 21-22 (ler-15 nov. 1925), Paris, p. 338

- See Commercial aeronautics: De toekomst van het luchtverkeer met

bestuurbare luchtschepen.

——- See Giacomelli, R. : Dirigibili rigidi e semirigidi.

- See Giacomelli, R.: Esperimenti d'atterraggio di dirigibili con mezzi

propri.

- See Nobile, Umberto: Contributo sperimentale allo studio delle variazioni

di carico utile di un' aeronave in dipendenza delle condizioni atmosferiche ambienti.

- See Nobile, Umberto : Sistema " Nobile " per atteramento ed ammaramento

meccanico di aeronavi.

- See Plessis, Jean du: Les grands dirigeables dans la paix et dans la guerre.

——■ See Verduzio, Rodolfo: Calcolo della navicella e degli organi accessori nei dirigibili.

Dixmtjde. See Du Plessis de Grenédan, Jean Joseph Aune Marie Julien: Les grande dirigeables dans la paix et dans la guerre . . .

Dollfus, Charles. Clément Ader.

L'Aéronautique, 7me année. No. 73 (juin 1925), Paris, pp. 208-209, ill.

- Considérations sur les records d'aviation.

L'Aéronautique, 7me année, No. 70 (mars 1925), Paris, pp. s6-t91, diagrs.

- La deuxième Coupe Gordon-Bennett.

L'Aérôtechnique (L'Aéronautique, 7me année, No. 74), 3me armée, Num. 31 Quii. 1925), Paris, p. 264, map.

- Un précurseur du moteur à combustion. Les travaux des frères Niepce

en 1806.

L'Aéronautique, 7me année, No. 71 (avril 1925), Paris, pp. 12S-130, ill.

- See Hirschauer, L., et Charles Dollfus: L'aunée aéronautique 1924-1925.

Dollfus, Walter. Der Luftverkehr.

Bale und Stuttgart, Geisteslehen.

Dongo. See Feiro: The Feiro "Dongo." A Hungarian school machine of unorthodox design.

Doolittle, J. H. Accelerations in flight.

National Advisory Committee for Aeronautics, Eeport No. 203, Feb. 28,1925, Washington, Government Printing Office, 1925, pp. 18, ill., diagrs.

- Air racing.

National Aeronautic Association Review, Vol. 3, No. 11 (Nov. 1925), Washington, D. C, pp. 163-164.

Doolittle, J. H. See Weyl, Alfred Richard: Uber neuere amerikanishce Bes-chieunigungs-messungen.

Dopes. See Andreeff, I. F.: The investigation of dopes.

- See Cerrie: "Cerrie."

—— See Deschiens, Maurice: Aviation dopes or varnishes.

- See Deschiens, Maurice: Le problème des enduits en aviation.

- See Fabrics: Materials and chemistry. Fabrics and dopes.

Dobe, Paolo. Su di un problema di aero-fotogrammetria.

l'aerotecnica, vol. 5, n. 3 (maggio-giugno 1925), pisa, pp. 161-171.

Doemot. See McLaughlin, George F.: The Dormoy monoplane.

doeniee, C. Neue Erfahrungen im Bau und Betrieb von Metallflugzeugen. zeitschr. ver. deutsch. ing., bd. 69, no. 43 (24. okt. 1925), berlin, p. 1363.

Dorniee Komet III. A new German passenger machine.

the aeroplane, vol. 28, no. 2 (jan. 14,1925), london, p. 36, ill.

- Verkehrsflugzeug " Dornier-Komet III."

aut. mot. flugw., 7. jahrg., nr. 6 (31. märz 1925), berlin, pp. 161-162, ill.

Douglas. Characteristics of the Douglas air mail plane.

u. s- air services, vol. 10, no. 9 (sept. 1925), washington, pp. 39-40, ill.

- The Douglas air mail plane.

aviation, vol. 19, no. 8 (aug. 24, 1925), new york, pp. 210-211, ill.

- The Douglas D. A. M. 2 biplane. The American machine designed for air

mail service.

flight, vol. 17, no. 50 (dec. 10,1925), london, pp. 806-807, ill.

- Douglas mail plane is completed and tested.

the ace, vol. 7, no. 1 (aug. 1925), glendale, calif., p. 9, ill.

- The Douglas 0-2, observation airplane.

slipstream, vol. 6, no. 7 (july 1925), dayton, ohio, pp. 18-19, ill.

- The Douglas transport.

aviation, vol. 18, no. 22 (june 1,1925), new york, pp. .606-607, ill.

Douglas, G. P., and R. McK. Wood. The effects of tip speed on air-screw performance. An experimental investigation of the performance of an air screw over a range of speeds of revolution from "model" speeds up to tip speeds in excess of the velocity of sound in air.

aeronautics, techn. rep. aer. res. com., 1923-24, vol. 1, london, 1925, pp. 345-367, ills., diagrs., tabls.

reports and memoranda, no. 884. october 1922, june 1923. (ae. 115.)

Douglas, G. P., F. B. Beadfield and A. S. Haetshoen. The lateral control of a biplane by combined use of ailerons and varying leading edge slots.

aeronautical research committee, reports and memoranda, no. 973 (ae. 188.), april 1925, london, 1925, pp. 14, ill., diagr., tabls.

Downwash. See Simmons, L. F. G., and E. Ower: An investigation of the downwash in the slip stream (Part I). With appendix by H. Glauert.

Doyle, Albert A. Fokker commercial seaplanes blaze new trail through Central America.

u. s. air services, vol. 10, no. 10 (oct. 1925), washington, p. 48.

Deag. See Betz, A.: A method for the direct determination of wing-section drag.

- See Martin, H. M.: The elements of the Lanchester-Prandtl theory of

aeroplane lift and drag. ,

Drag. see royal aircraft establishment: report of the design panel on the scae effect on lift, drag, and center of pressure of complete aeroplanes.

Drift. See warner, edward p.: the drift of an airplane guided toward its destination by directional receiving of radio signals transmitted from the ground.

Driggs, Ivan h. direct solution of airplane spar design.

aviation.vol. 19, no. 2 (july 13, 1925), new york, pp. 34-36.

--the light airplane. brief review of the results obtained in the development of light airplanes.—I. modern theoretical aerodynamics as applied to light airplane design.—II.

national advisory committee for aeronautics, technical memorandums no. 311, april 1925, washington, pp. 30, tabls. reprinted from "the slipstream monthly," dec. 1924, and jan. 1925.

--the light airplane. modern theoretical aerodynamics as applied to light

airplane design with a series of charts.—III. design of an airplane with reference to physical dimensions, component weights, and disposition of surfaces.—IV. design of an airplane with reference to balance, distribution of weights and moments.—V.

national advisory committee for aeronautics, technical memorandums no. 326, aug. 1925, washington, pp. 34, ill., tahls. reprinted from "the slipstream monthly," feb., april, and july 1925.

- the light plane.

slipstream, vol. 6, nos. 2, 4, 7 (feb. april, july 1925), dayton, ohio, pp. 11-13, 14-18, 11-13, ill.

Driggs, l. l. daughter of the stars! destruction of the shenandoah.

outlook, vol. 141 (sept. 16, 1925), new york, pp. 78-79, ill.

- our merchant aviation.

outlook, vol. 140 (aug. 6, 1925), new york, pp. 495-496.

Drum, h. a. tying our wings to the ground; argument against a separate air service.

independent, vol. 114 (mar. 14, 1925), new york, pp. 287-289.

Dryden, h. l. Sec briggs, l. j., g. f. hull, and h. l. dryden: aerodynamic characteristics of airfoils at high speeds.

du Plessis de Grenedan, Jean Joseph Anne Marie Julien. les grand dirigeables dans la paix et dans la guerre . . . oeuvres complètes pub. par le comte j. du plessis . . . préface du capitaine de frégate de réserve thierry. paris, plon-nourrit et cie, [1925-

Dubois, Paul, und Wolfgang Kaempfert. flugbahnen und stromfeld im luv.

zeitschr. flugt. mot., 16. jahrg., 12. heft (28. juni 1925), münchen, pp. 244-249, diagrs. (ergebnisse des messtrupps des rhönsegelflug-wettbewerbes.)

Ducas, Pierre. see blanchet, georges: aviateurs contemporains. pierre ducas.

Dürr, l. fünfundzwanzig jahre zeppelin-luftschiffbau. berlin, v. d. i. verlag, 1925, pp. 83, ill.

reviewed in journ. rey. aer. see, vol. 29, no. 180 (dec. 1925), londen, p. 651.

Duhamel, Rob. étude sur les corps lacrymiformes. formes de moindre résistance à l'avancement.

l'aérophile, 33e année, nos. 3-6( ler-15 fêv.-ier-15 mars 1925), paris, pp. 49-52, 77-79, ill.

Dumanois, Paul. au subjet de la détermination d'un critère de fatigue générale des moteurs à combustion interne.

c. r. acad. sei., t. 172, no. 1 (3 jan. 1925), paris, pp. 44-46,

D oMANOis, Patji,. Combustibles et antidétonants.

la techn, aéion., 16a année, n. s., no. 47 (15 sept. 1925), paris, pp. 276-283, ill

- Prix Plumey 1924 de l'Académie des Sciences awards.

c. b. acad. sei., t. 173, no. 24 (12 dec. 1924), paris, p. 1334.

Duplex wind tunnel. See Lavender, T.: The "Duplex" wind tunnel of the National Physical Laboratory.

— See Reif, E. P., and E. Ower: Lift, drag, and pitching moment of the one-fifth scale Bristol fighter model in the Duplex wind tunnel.

Dupont, P. Considérations sur une théorie électrostatique du mouvement des fluides.

l'aérophila, 33a année, nos. 17-18 (ler-15 sept. 1925), paris, pp. 275-278, ill.

Dupont e Girault. Quelques problèmes relatifs aux profils Joukowski (Tracés des normales et des tangentes).

bulletin technique n. 22 du service technique de l'aéronautique.

Duralumin. Influence de l'eau salée sur le duralumin.

l'aéronautique, 7me année, no. 69 (fév. 1925), paris, p. 77, ill.

- See Meissner, K. L. : Alloys similar to duralumin made in other countries

than Germany.

--See Propellers: Development of Curtiss-reed duralumin propeller.

Duralumin welding. The question of duralumin welding.

aviation, vol. is, no. 16 (apr. 20,1925), new york, p. 439.

Durward, J. Investigation of the winds in the upper air from information regarding the place of fall of pilot balloons and the distribution of pressure.

air ministry, meteorological office, professional notes no. 42 (no. 273b), 1925, london h. m. stationery office, 1925.

- Measurements of vertical currents in the lowesi layers of the atmosphere

during sea breezes.

aeronautical besearch committee, beports and memoranda, no. 941 (m. n. 8.), august 1923, london, 1925, pp. 5, maps.

Duval, A.-B. Le point de vue du passager en aéronautique marchande. la techn. aéron., 16e année, n. s.. no. 44 (15 juin 1925), paris, pp. 162-166.

- Le problème de l'aérodrome dégagé au maximum.

. l'aéronautique, 7ma année, no. 69 (fév. 1925), paris, pp. 41-43, ill.

Duverne, E. Sur les possibilités d'atterrissage de Konakry à Djibouti suivant la route parcourue par la Rolland-Pittain 10 HP, qui la première du monde traversa l'Afrique.

' l'aérophile, 33e année, nos. 11-12 (ler-15 juin 1925), paris, pp. 186-187, port.

Dynamometers. See Martin, H. M.: Electric dynamometers in engine development.

Dyson, Charles. Screw propellers and estimation of power for propulsion of ships, also airship propellers.

new york and london, simmons-boardman publishing co., 1924, vol. 1, text; vol. 2, atlas.

E

Ear. See Mallock-Armstrong: Mallock-Armstrong ear defender.

Earth industor compass. See Colvin, Charles H.: The pioneer earth inductor compass.

East Indies. See Van der Hoop, Thomassen à Thuessink: The flight to the Netherlands East Indies.

\

Eaton, H. N., and C. T. Buckingham. Nonmetallic diaphragms for instruments.

national advisory committee lor aeronautics, eoport no. 206, may 2, 1925, washington, government printing office, 1925, p. 44, ill., diagrs.

Eck, Bruno. Neuartige Berechnung der aerodynamischen Eigenschaften eines Doppeldeckers.

zeitschr. flugt. mot., 16. jahrg., 9. heft (14. mai 1925), münchen, pp. 183-194, ill.

- Potential flow in engine valves.

national advisory committee for aeronautics, technical memorandums no. 343, dec. 1925, washington, p. 20, ill. reprint from "zeitschrift für angcwante mathematik und mechanik," vol. iv, 1924.

Eckart, C. Life of metastable helium and mercury.

science n. s., vol. 61 (may 15, 1925), garrison, n. y., pp. 517-518.

Eckener, Hugo. Modern Zeppelin airships.

journ. roy. aer. soc, vol. 29, no. 174 (juno 1925), londou, pp. 269-294. aero digest, vol. 6, no. 5 (may 1925), new york, pp. 257-260, ill.

- See Dirigibles: Can huge dirigibles supplant our expresses and liners.

- See Poeschel, Johannes: Einführung in die Luftfahrt . . .

Eclipse. Aircraft observations of eclipse.

aviation, vol. 18, no. 5 (feb. 2, 1925), new york, p. 133.

- Navy dirigible and the eclipse.

science n. s., vol. 60, sup. 10 (dec. 19,1924), garrison, n. y.

Eddies. See Griffith, A. L., and A. W. Porter: On eddies formed behind apertures through which air is streaming.

Edge, S. F. On traveling by air.

flight, vol. 17, no. 10 (may 7,1925), london, p. 277.

enwards, Davis. Gibraltar shorn of strength.

aero digest, vol. 7, no. 3 (sept. 1925), new york, pp. 474-475, ill.

Edwards, J. T. Aviation maps.

the ace, vol. 6, no. 2 (july 1925), glendale, cal., p. 11.

Efficiency. Engines. Mechanical efficiency.

aeronautics. tech. rep. aer. res. com., 1923-24, vol. 1, london, 1925, pp. 30-31.

Eisenlohr. Flugzeug-Modellbogen. berlin, verlag kissing & co.

Eisenlohr, R. Eine Lehrmittelsammlung für Luftfahrzeugbau an der Techn. Hochschule zu Karlsruhe.

zeitschr. flugt. mot., 16. jahrg., 1. heft (14. jan. 1925), münchen, pp. 11-12, ill.

Electrical equipment. Les postes de T. S. F. et les équipements électriques nouveaux.

l'aéronautique, 7me année, no. 69 (fêv. 1925), paris, pp. 51-52, ill.

Electrical indicators. See Royal Aircraft Establishment: Flight tests with R. A. E. electrical indicator.

Électricité atmosphérique. See Chauveau, B.: Électricité atmosphérique.

Elias. The Elias mailplane.

aviation, vol. 18, no. 18 (may 4, 1925), new york, pp. 486-4s7, ill.

Ellipsoius. See Tuckerman, L. B,: Inertia factors of ellipsoids for use in airship design.

Ellsworth, Lincoln. See Amundsen, Roald, and Lincoln Ellsworth: Our Polar flight.

Elmendorf, Armin. Plywood and metal-faced plywood.

aviation, vol. 19, no. 8 (aug. 24, 1925), new york, p. 215.

Elworthy, R. T. Helium and airships.

nature, vol. 115, no. 2883 (jan. 31, 1925), london, p. 158.

Emerson, Raffe. 25 years building Zeppelin airships.

aviation, vol. 18, no. 6 (feb. 9, 1925), new york, p. 162.

Endras, C. Die Lieferung der Gaszellen und Aussenhüllen-Stoffe für die SL-Luftschiffe von 1910-1918.

zeitsobr. flugt. mot., 16. jahrg., 15. heft (14. aug. 1925), münchen, pp. 294-296.

Endurance records. Up in a seaplane 2S}4 hours.

literary digest, vol. 85 (may 16, 1925), new york, pp. 64-65.

Engine indicators. See Moss, H., and W. J. Stern: Phase setting of engine indicators.

- See Royal Aircraft Establishment: Flight tests with R. A. E. electrical

indicator.

Engine starters. See Ash, P. T.: Building starters for aeronautical motors. Engineering. See Rhode, R. V.: Aerial photography in engineering.

- See Wilson, E. : Commercial aspects of aerial photography.

Engines. Air-cooled triumph.

scientibc american, vol. 133, (aug. 1925), new york, pp. 127-128, 111.

- Les accessoires de moteur au Salon.

l'aërotecbnlque (l'aéronautique, 7me année, no. 70), 3me année, num. 27 (mars 1925), paris, pp. 101-104, ill.

- The aeronautical engine laboratory, Naval Aircraft Factory, Philadelphia.

journal, american society of naval engineers, vol. 38, no. 2 (may, 1925), washington, pp. 275-305, ill.

- American and British aero engine specifications.

automotive industries, vol. 52, no. 9 (feb. 26,1925), new york, p. 421.

- Le concours de moteurs de grande endurance.

l'aêrophile, 33e année, nos. 23-24 (ler-15 dëc. 1925), paris, pp. 364-366, ill. •

- Démarreur pour moteur d'aviation.

l'aêrophile, 33e année, nos. 19-20 (ler-15 oct. 1925), paris, pp. 313-314, ill.

- The development of the light aeroplane engine.

the aeroplane, vol. 28, no. 8 (feb. 25,1925), london, pp. 181, 182.

—— Engines.

aeronautics. techn. rep. aer. res. com., 1923-24, vol. 1, london, 1925, pp. 27-33.

- The evaporative cooling of engines and the condensation of their exhaust.

the aeroplane, vol. 29, no. 20 (nov. 11, 1925), london, p. 566.

- Gas turbine.

scientific american, vol. 133 (july, 1925), new york, pp. 57-58.

--lets over prijzen van vliegtuigmotoren.

het vliegveld, 9de jaarg., no. 12 (dec. 1925), amsterdam, pp. 317-320.

—•— Increasing aero engine power at altitude. Bristol "Jupiter" variable timing gear.

flight, vol. 17, no. 8 (feb. 19, 1925), london, pp. 99-100, ill.

---Increasing engine power at altitude.

aviation, vol. 18, no. 23 (june 8, 1925), new york, p. 641, ill.

ngines. Influence des vibrations sur la durée des pièces des moteurs d'aviation. l'aéronautique, 7me année, no. 72 (mal 1925), paris, pp. 182-183, ill.

— Installatieproblemen bij luchtgekoelde motoren.

het vliegveld, 9de jaarg., no. 12 (dec. 1925), amsterdam, pp. 326-329.

— The installation of the air-cooled radial.

the aeroplane, vol. 29, no. 23 (deo. 2, 1925), london, p. 646.

— Installing the power plant.

scientific american, vol. 133, (nov. 1925), new york, pp. 341-342, 111.

— Light aeroplane engine development.

flight, vol. 17, no. 9 (feb. 26, 1925), london, pp. 118-120.

— Les moteurs d'avion au Salon.

l'aérotechnique, (l'aéronautique, 7me année, no. 68), 3me année, num. 25 (jen. 1925), paris, pp. 16-23, ill.

— Les moteurs fixes en étoile à refroidissement par air.

l'aéronautique, 7me année, no. 70 (mars 1925), paris, p. 92.

— One pound per horsepower.

scientific american, vol. 132, (may 1925), new york, pp. 346-347, ill., diagr.

— Recent developments in aero engines.

slipstream, vol. 6, no. 5 (mey 1925), dayton, ohio, pp. 19-21, ill.

- Rickenbacker designs light motor for commercial aircraft.

tj. s. air services, vol. 10, no. 12 (dec. 1925), washington, pp. 22-24, ill.

- Les tendances de la construction des moteurs.

l'aérophile, 33e année, nos. 13-18 (ler-15 juil.-ler-15 sept. 1925), paris, pp. 212-214, 249-251, 279-281, ill.

- See Air Ministry: Air Ministry tests for aero engines.

- See Airdisco: Airdisco engines.

- See Andreau: Le moteur Andreau.

- See Angle, Glenn Dale: Displacement limits for light plane engines.

- See Angle, Glenn Dale: Engine dynamics and crankshaft design.

- See Arnold, H. H.: Wars have forced major developments in United

States airplane engine design.

- See Barbel, Henri: Le graissage des moteurs à l'huile minérale.

--See Bartels, F.: Konstruktive Geschichtspunkte des modernen Flugmotorenbaues. Die Wirkungsgrade der Flugmotoren.

- See Black, Archibald : Developing a thoroughbred.

- See Black, Archibald: $10,000 airplane engine depreciates $10.60 per hour

of service.

- See Blanchet, Pierre: Quelques considérations sur l'installation des

groupes motopropulseurs à berd des avions.

- See Boedecker, K. J. : The economy of air cooling.

- See Bradley, W. F.: Sleeve-valve aircraft engine passes French endurance test.

- See Bramson, M. L.: On engine failures and forced landings.

- See Breguet: Le nouveau quadrimoteur Breguet.

- See Bristol: "Bristols" on the Continent. " Jupiter" the standard engine

in 13 countries.

Engines. »See Bristol Jupiter: The Bristol Jupiter aircraft engine.

- See Bristow, W. A.: Die Entwicklung der Flugmotorenkonstruktionen

nach dem Kriege.

- See Carburetors: British standard method for the calibration of carburetor jets for aircraft and automobile engines.

- See Cave-Browne-Cave, T. R.: The evaporative cooling of aircraft

engines.

--See Cirrus: The "Cirrus" engine.

- See Cirrus: The 60-horsepower "Cirrus" light plane engine.

--See Clerget, P.: Nouvelles recherches sur les origines du moteur à combustion : Le moteur des Frères Niepce (1806).

- See Clerget, P.: Reconstitution du moteur à explosion des frères Niepce

de 1806.

- See Damblanc, Louis: Sur un dispositif applicable aux moteurs d'aviation

pour rédure les pertes de puissance en altitude.

—-— See Delalande, P. J. : Les moteurs à huile lourde Beardmore.

- See Dollfus, Charles: Un précurseur du moteur à combustion. Les

travaux des frères Niepce en 1806.

- See Dumanois, Paul: Combustibles et antidétonants.

- See Eck, Bruno: Potential flow in engine valves.

-- See England: England prescribes difficult tests for airplane engines.

- See Fedden, Roy: Installation problems of radial air-cooled engines.

- See Fedden, Roy.: Radial air-cooled aero engines.

- See Fell, L. F. R. : Light aeroplane engine development.

- See Fenning, R. W.: Air-hydrogen explosions in closed vessels.

- See Fleury, de: Influences fondamentales des emplois des métaux légers

sur les rendements thermodynamiques et mécaniques des moteurs à explosion.

- See Garner, H. M., and W. G. Jennings: The variation of engine power

with height.

- See Gilles, G.: Les moteurs des circuits des airs allemands.

- See Gillette, L. S.: Rickenbacker enters aircraft field with 75 horsepower

radial engine.

--See Gosslau, F.: Flugmotoren auf der neunten Pariser Luftfahrtausstellung.

--See Grard, Charles: Influence de la zone thermique de travail sur le

sélection des aciers pour soupapes de moteurs d'aviation.

- See Heron, S. D.: Air-cooled engine development.

- See J. B. : Le moteur Farman 500 CV, 12 cylindres en W, détenteur des

records du monde de durée et de distance.

- See Jalbert, J. : Les moteurs à deux temps pour avion.

- See Jewett: Jcwett has new engine, axles, and bodies.

- See Jones, E. T. : Achievements of American aircraft-engine industry.

Enqines. See Kobayashi, A.: Effect of altitudes on the power of aero engines.

- See Kuipers, C: Bijzonderheden over de ontwikkeling der vliegtuig-

motoren van 1903-1923.

- See Lea, F. C. : Aluminum alloys for aeroplane engines.

- See Lehr, G.: L'emploi des régimes rapides dans les moteura d'aviation.

- See Lind, Wallace Ludwig: Internal-combustion engines; their principles

. and application to automobile, aircraft, and marine purposes.

- See Lorraine-Dietrich: Le moteur Lorraine-Dietrich 450 CV, 12 cylindres

en W.

- See Magnan, A.: L'aviation sans moteur.

- See Martin, H. M.: Electric dynamometers in engine development.

—— See Masméjan, A., et E. Berehare: Les moteurs à explosion dans l'aviation.

- See Mead, G. J. : The development of the air-cooled aviation engine.

- See Mead, G. J. : Some aspects of aircraft engine developments.

- See Meyer, R.: Luftfahrzeuge und Luftfahrzeugmotoren. Ausgabe I der

Deutschen Kraf tf ahrzeug-Tj'penschau.

—— See Morehouse. The Morehouselightplaneengine. A horizontally opposed twin of American origin.

- See Morris, J.: Vibration in engine test gear.

- See Langley Field.: Oil engine research at Langley Field.

- See Packard: The new Packard aircraft engines.

- See Paris: Aero engines at the Paris aero show.

- See Paris. Engine accessories at Paris aero salon.

- See Peterson, C. G.: Wright "Cyclone" engine.

- See Poincaré: Considérations théoriques sur le rendement des moteurs.

- See Prayer, Georg: Increasing the power of internal-combustion engines.

- See Raffaelli, Italo: Progetto di massima di turbo-motore di aviazione

DA 450 HP.

- See Raffaelli, Italo: Sui motori di quota.

- See Renault: Le moteur Renault du concours de grande endurance.

- See Rickenbacker: The Rickenbacker commercial aero engine. A new

air-cooled radial of American design.

- See Rickenbacker: The Rickenbacker light engine.

- See Royal Aircraft Establishment: Exhaust manifold temperatures.

- See Rumpler: The 1,000-horsepower Rumpler aircraft engine.

- See Seymour, L. D.: Engine characteristics and performance form.

- See Siddeley, J. D.: Reliability of aircraft engines.

- See Sparrow, Stanwood W. : Aviation engine performance.

- See Sparrow, Stanwood W.: The effect of changes in compression ratio

upon engine performance.

- See Stanton, T. E.: The friction of pistons and piston rings.

Engines. . See Stevens, H. L.: Variation of engine power with height. . -- See Stewart, J.: The "Cirrus" low-powered engine.

- See Sugimoto, O.: The horsepower rating formula for aerö engine.

- See Tanaka, Keikichi: The inertia forces and couples and their balancing

of the Star-type engine.

- See Taylor, C. Fayette: The design of air-cooled cylinders.

- See Varni, A.: Nota su un nuovo motore per navigazione marittima'ed

aerea.

- See Vincent, J. G.: Designing engines into airplanes.

- See Walter: The Walter aero engines.

- See Weyl, Alfred Richard: Der Stand des Baues starker Flugmotoren im

Auslande.

- See Wilson, E. E.: Aircraft engine design.

- See Wilson, E. E.: Aircraft engine progress.

- See Woolson, L. M.: Recent developments in aircraft engines.

- See Wright: Two American aero engines. The Wright "Cyclone" and

the "Tornado."

- See Wright: The Wright Cyclone aviation engine.

England. Aerial survey of England.

flight, vol. 17, no. 22 (may 28, 1925), london, p. 230.

- Britain's growing air force.

literary digest, vol. 84 (mar. 21, 1925), new york, pp. 18-19.

- Britain's new airships to dwarf all others.

literary digest, vol. 84 (jan. 31, 1925), new york, pp. 49-52.

- England prescribes difficult tests for airplane engines.

automotive industries, vol. 53, no. 25 (dec. 18, 1925). new york, p 1012.

- English air appropriation $101,479,868.

aviation, vol. 18. no. 11 (mar. 16, 1925), new york, p. 295.

- See Abeelen, van den: De Engelsche luchtvaartbegrooting.

- See Great Britain.

- See Horsfall, A. : In the air over England.

- See Leroux: L'organisation technique officielle de l'aéronautique aux

Etats-Unis en Angleterre et en France.

-- See Thomson, Lord, and W. Sefton Brancker: Britain in the air.

English Channel. English Channel problems.

aviation, vol. 19, no. 24 (dec. 14, 1925), new york, pp. 846-847.

English Electric Company. See Kingston: The "Kingston" metal-hull flying boat.

Eppinger, Curt. Die Ausstellung der Deutschen Luftfahrzeug-Industrie.

zcitschr. flugt. mot., 16. jahrg., 17. u. 18. heft (9 sept. 1925), münchen, pp. 368-398, ill.

Equipment. See Trains: Treno squadriglia.

Escaille, de l'. Les routes aériennes.

la techn. aéron., 16e année, n. s., no. 44 (15 juin 1925), paris, pp. 167-170.

Escande, L. La similitude étendue aux grandes vitesses.

o. b. acad. sei., t. 181, no. 8 (24 août 1925), paris, pp. 295-297.

escande, L., et M. Ricatto. Sur le similitude des fluides visqueux.

c. e. acad. sei., t. 180, no. 18 (4 mal 1926), peris, pp. 1326-1328.

Escande, L. See Camichel, A., L. Escande et M. Ricaud: Sur l'écoulement des fluides visqueux autour d'un obstacle.

esclangon, Ernest. L'acoustique des canons et projectiles. paris, qautbier-villars et cie., 1926, pp. 388, ill.

Esperanto. See Archdeacon, Ernest: Conférence internationale pour l'application pratique de l'Espéranto (14-18 mai 1925).

Estimates. On the air estimates.

the aeroplane, vol. 28, no. 8 (feb. 25, 1925). london, pp. 168-172.

- See Abeelen, van den: De Engelsche luchtvaartbegrooting.

- See Great Britain: The air estimates. A net increase of £652,000.

- See Great Britain: The air estimates debates.

Eula, Antonio. Anemometria.

l'aerotecnica, vol. 5, n. 6 (nov.-dic. 1925), pisa, pp. 339-401, ill.

- Le prove alla vasca dei modelli dei galleggianti di idrovolante.

l'aerotecnica, voi. 5, n. 1 (gen.-feb. 1925), pisa, pp. 5-57, ill.

- Studio sistematico alla vasca di galleggianti a scafo per idrovolante (la

serie di esperienze).

bend. tecn. dir. gen. genio costr. aer., anno 13, n. 8 (15 nov. 1925), roma, pp. 6-12, ills., diagrs.

Europe. Air traffic in Europe.

scientific american, voi. 133 (july, 1925), new york, pp. 8-9, ill., maps.

- Le circuit des capitales autour de l'Europe.

l'aérophile, 33e année, nos. 15-16 (ler-15 août 1925), paris, pp. 230-232, 111.

-• Europe's progress in aviation.

scientific american, vol. 133 (dec. 1925), new york, p. 372.

- French airmen's flight around Europe.

flight, vol. 17, no. 34 (aug. 20, 1925), london, p. 536.

- Winged transport in Europe.

independent, vol. 115 (dec. 5, 1925), new york, pp. 632-633, 111.

- See Commercial aeronautics: Traffico aereo mondiale e problemi dell'aviazione commerciale europea.

- See Transportation: Progress of air transport in Europe.

Eustice, J. Flow of fluids in curved passages.

engineering, vol. 120, no. 3124 (nov. 13, 1925), london, pp. 604-605, 111.

Everest flight. See Cobham, Alan J.: Alan Cobham's Everest flight. Everling, E., und Horst Müller. Die technischen "Begriffsbestimmungen."

zeitschr. flugt. mot., 16. jahrg., 22. heft (28. nov. 1925), münchen, pp. 463-467, diagrs., tabls.

Ewald. Die Deutsche Verkehrsausstellung. Raum 5. Luftbild und Luftbildmessung.

zeitschr. flugt. mot., 16. jahrg., 17. u. 18. heft (9. sept. 1925), münchen, pp. 337-350, 111.

- Verwertung der Flugzeugphotographen für die Aufnahme von Waldgebieten.

illustrierte flugwoche, bd. 5, nr. 21-22 (13. nov. 1923), lelpslc, p. 135. Ewald, Erich. See Poeschel, Johannes: einführung in die Luftfahrt ... t 53466—28-5

Exploration. Adventure or exploration.

Outlook, Vol. 140 (July 1, 1925), New York, pp. 324-325, map.

- -No Man's Land.

Outlook, Vol. 139 (Apr. 22, 1925), New York, p. 601, 111.

- See Amundsen, Roald: My Polar flight.

- See Amundsen, Roald, and Ellsworth Lincoln: Our Polar flight.

- See Binney, George: With seaplane and sledge in the Arctic.

- See Bruno, H. A.: Flying explorers.

- See Mittelholzer, Walter,, and others: By airplane toward the North Pole;

an account of an expedition to Spitzbergen in the summer of 1923.

- See Tymms, F.: The Oxford University Arctic Expedition, 1924. IV.

Aerial navigation in the Arctic.

Exports. 1924 aircraft exports nearly double.

Aviation, Vol. 19, No. 1 (July 6, 1925), New York, p. 13.

F

F. K. 33. The Koolhoven F. K. 33.

The Aeroplane, Vol. 29, No. 13 (Sept. 23, 1925), London, p. 380, ill.

F. W. See W., F.: Flugzeug-Reklame.

- See W., F.: Flugzeugbau in der Tschechoslovakei. Aero-Flugzeuge.

-- See W., F.: Sensationsgel äste.

Fabrics. Materials and chemistry. Fabrics aud dopes.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 39-40.

- Tests of aeroplane and other fabrics.

Engineering, Vol. 120, No. 3125 (Nov. 20, 1925), London, pp. 638-639.

- United States Government master specifications for mercerized cotton

airplane cloth, grade A.

United States Bureau of Standards, Circular No. 270, June 15, 1925, Washington, Government Printing Office, pp. 5.

- See Endras, C: Die Lieferung der Gaszellen und Aussenhüllen-Stoffe für

die SL-Luftsehiffe von 1910-1918.

- See Glendinning, W. G.: Report on the use of artificial sources of light

as a substitute in the weathering of fabric: Part 1.

--See Ramsbottom, J. E.: Aircraft fabrics.

Fage, A. An analysis of the pressure distribution on a model air screw by means of the vortex theory.

Aeronautical Research Committee, Eeports and Memoranda, No. 940 (Ae. 161.), November 1924, London, 1925, pp. 6, dlagrs.

- The effect of a large boss on air-screw performance.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 1, London, 1925, pp. 331-333, ill., diagr. Eeports and Memoranda, No. 871. June 1923. (Ae. 107.)

- An experimental study of the vibrations in the blades and shaft of an

air screw.

Aeronautical Eesearch Committee, Eeports and Memoranda, No. 967 (Ae. 183.), September 1925, London, 1925, pp. 16, ill., diegrs. Nature, Vol. 115, No. 2889 (Mar. 14, 1925), London, p. 400. i •

Proc. Roy. Soc. A743 (Mar. 2, 1925), London, pp. 451-469.

Fage, A., and L. F. G. Simmons. An investigation of the air flow pattern in the wake of an airfoil of finite span. or.

Nature, Vol. 116, No. 2928 (Dec. 12, 1925), London, p. 886.

Faoe, A., and H. L. Nixon. The prediction on the Prandtl theory of the lift and drag for infinite span from measurements on aerofoils of finite span.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 183-196, diegrs., tabls. Reports and Memoranda, No. 903. Decemher 1923. (Ae. 132.)

Fairbanks, Karl J. Pressure distribution on the nose of an airship in circling flight.

National Advisory Committee (or Aeronautics, Technical Notes No. 224, August 192-^ Washington, pp. 4, ill.

Fairchild, Sherman M. Gotham lies below.

Aero Digest. Vol. 6, No. 2 (Feb. 1925), New York, pp. 93-94, 100, ill.

Fairey. See Broenie, de: De nieuwe Fairey zeevliegtuigen voor de Koninlijke Marine.

- See Irving, H. B., and A. S. Batson: Forces and moments (including

those due to controls) on a model Fairey "N4" flying boat "Atlanta," at various angles of yaw.

Fairey works. . Great Britain's largest aircraft factory. Impressions of a visit to the Fairey works.

Flight, Vol. 17, No. 5 (Jan. 29, 1925), London, pp. 56-60, iU.

Fairlamb, George R., Jr. Strong views on air power.

Aviation, Vol. 18, No. 1 (Jan. 5, 1925), New York, p. 21.

Far East. On the situation in the Far East.

The Aeroplane, Vol. 28, No. 24 (June 17, 1925), London, pp. 585-586.

Farman. The four-engined Farman Goliath. Holder of several French and World's records.

Flight, Vol. 17, No. 52 (Dec. 24, 1925), London, p. 841, ill.

- New Farman bomber.

Aviation, Vol. 19, No. 9 (Aug. 31, 1925), New York, p. 249, ill.

- Les records du monde de durée et de distance détenus par Farman.

L'Aéronautique, 7me année, No. 76 (sept. 1925), Paris, pp. 327-328, ill.

- Le "Super-Goliath" Farman à quatre moteurs Farman 500-horsepower

bat ou établit onze records du monde.

L'Aéronautique, 7me année, No. 79 (déc. 1925), Paris, pp. 446-447, ill.

- See J. B. : Le moteur Farman 500 CV, 12 cylindres en W, détenteur des

records du monde de durée et de distance.

- See Records: The world's duration record. Some further details concerning the wonderful Farman performance.

--See Reyneker, F. H.: Het Farman Jabiru verkeersvliegtuig.

Farman prize. See Solex prize: Farman wins Solex prize.

Fatiqtje of metals. Materials and chemistry. Fatigue of metals.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 33-37.

- Some fatigue tests on nonferrous metals.

Avletion, Vol. 1», No. 1 (July 6,1925), New York, p. 10.

1

- See Thomas, W. Norman: The effect of scratches and of various workshop

finishes upon the fatigue strength of steel.

Fatjber, William Harrison. Early developments of the hydroplane. Aero Digest, Vol. 7, No. 1 (July 1925), New York, p. 376, ill.

Fechet, James E. Col. James E. Fechet appointed assistant chief of Air Service.

Aviation, Vol. 18, No. 11 (Mar. 16,1925), New York, p. 290, ill.

Fechet, James A: Colonel Fechet named assistant chief of Air Service. U. s. Air Services, Voi. 10, No. 4 (April 1925), Washington, p. 22, ill.

'■- Lieutenant Colonel Fechet has 27-year military record.

Aero Digest, Vol. 6, No. 4 (April 1925), New York, p. 192, ill.

Fbdden, Rot. Installation problems of radial air-cooled engines. Flight, Vol. 17, No. 49 (Dec. 3, 1925), London, pp. 799-800.

- Radial air-cooled aero engines.

Flight, Vol. 17, No. 42 (Oct. 15,1926), London, pp. 674-«76.

Federation Aéronautique Internationale. Conférence de la Fédération Aéronautique Internationale à Prague.

L'Aérophile, 33e année, Nos. 19-20', (Isr-16 oct. 1925), Paris, pp. 306-308, Ü1.

Fbiro. The Felro " Dongo." A Hungarian school machine of unorthodox design.

Flight, Vol. 17, No. 4 (Jan. 22,1925), London, pp. 39-40, diagr.

Fell, L. F. R. Light aeroplane engine developments. ,,.

Journ. Eoy. Aer. Soc, Vol. 29, No. 172 (Apr. 1925), London, pp. 168-178. National Advisory Committee for Aeronautics, Technical Memorandums No. 309, April

1925, Washington, pp. 24, tabls.

Paper raad at a joint meating of tha Royal Aeronautical Society and of tbe Institution of Automobile Engineers, Feb. 19,1926.

Penning, R. W. Air-hydrogen explosions in closed vessels.

Aeronautics. Techn. Rep. Aar.Res. Com., 1923-24, Voi. 2, London. 1925, pp. 629-661, ills., diagrs., tabls.

Reportsand Memoranda, No. 902. April 1924. (E. 10.)

'- ■ Closed vessel explosions of mixtures of air and liquid fuel (petrol, hexane.

and benzene) over a wide range of mixture strength, initial temperature, and initial pressure.

Aeronautical Research Committee, Reports and Memoranda, No. 979 (E. 15.), September

1926, London, 1925, pp. 22, Ills., diagrs., tabls.

Fbrndon, William S. Financing commercial aviation.

' ' u. S. Air Services, Vol. 10, No. 10 (Oct. 1925), Washington,' p. 46.

Feuerschutz. Der Flugzeug-Feuerschutz.

Aut. Mot. Flugw., 7. Jahrg., Nr. 6 (15. Marz 1925), Berlin, pp. 135-136, ill.

Fiat. The Fiat B. R. 1.

The Aeroplane, Vol. 28, No. 25 (June 24, 1925), London, p. 635, diagr.

Fick, Roderich. Relation of "Lilienthal effect" to dynamic soaring flight.

National Advisory Commtttea for Aeronautics, Technical Memorandums No. 324, July . . ■ 1925, Washington, pp. 14, ill.

From "Zeitschrift für Flugtechnik und Motorluftschiffahrt," 1924, Nov. 28, and Dec. 12.

Finat, Maurice.. See Blanchet, Georges: Aviateurs contemporains. Maurice Finat.

Finland. See Kop, F. H. van der: De mogelijkheden van het Finsche lucht-verkeer.

Fire. Fire prevention on heavier-than-air craft.

Aeronautics. Techn. Rep. Aar. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 42-44.

Fireproof bulkheads. See Royal Aircraft Establishment: Fire experiments • with various types of fireproof bulkheads.

Fischer, L. Germany takes to the air.

Independent, Vol. Ù6 (Nov. 28, 1925), New York, pp. 604-606, ill.

Fischli, Fritz. Aeronautische météorologie.

■■> Berlin, Richard Cari Schmidt, 1924, pp. 296, ill. (Bib. für Luftschiff, und Flugtech. Bd. 7).

Fisher-Poturzyn, Frederick A. Uber den Weltluftverkehr und ewropäiche Luftverkehrsprobleme.

Zeit, Osterr. Ing. Arcb. Ver, 77. Jahrg., Nr. 23, 24 (12 Juni 1925), Wien, pp.203-206, maps.

Fishery Board for Scotland. See Wood, Henry, and George McGee: Aircraft experiments for the locating of herring shoals in Scottish waters, 1924.

Fjeldstad, Jonas Ekman. Graphische methoden zur ermittelung adiabatischer zustandsänderungen feuchter luft. ,

Geofyslske Publikationer, Vol. 3, No. 13, Utgit av det Norske Videnskaps-Akadenie, Oslo, 1925, pp. 25, dlagrs.

Flauer, Fred. The A-l aerial ambulance.

Slipstream, Vol. 6, No. 4 (Apr. 1925), Dayton, Ohio, pp. 9-11, ill.

Flammarion, Camille. See Graffigny, Henry de: Camille Flammarion.

Flap. See Bradfield, F. B.: On the use of a slotted trailing flap on aerofoils of various cambers.

Flapping flight. See Lippisch, Alexander: Theory of flapping flight:

Flettner. The Flettner rotor and aircraft.

Tha Aeroplane, Vol. 28, No. 4 (Jan. 28, 1925), London, p. 82.

- The Flettner rotor-ship.

Journ. Soc. Automotive Engineers, Vol. 16, No. 6 (June 1926), New York, pp. 599-600, ill.

- See Betz, A.: The "Magnus effect," the principle of the Flettner rotor.

- See Betz, A.: Der Magnus-Effekt, die Grundlage der Flettnerwalze.

-- See Delanghe, G.: L'aérodynamique des cylindres tournants.

- See Gymnich, Alfried: Flettner-rotor und flugtechnik.

- See Rizzo, Frank: The Flettner rotor ship in the light of the Kutta-Jou-

kowski theory and of experimental results.

Flettner, Anton. Anwendung der Erkenntnisse der Aerodynamik zum Windvortrieb von Schiffen.

Zeitschr. Flugt. Mot., 16. Jahrg., 3. Heft (14. Feh. 1925), München, pp. 52-66, ill.

- See Bose, N. K.: Hydrodynamical principles of Herr Flettner's "rotor

ship."

- See Chait, B. A.: Le rotor, instrument à progrès, en marge du "Flettner-rotor."

- See Delanghe, G.: Les théories de l'aérodynamique moderne.

-.- See Kiemin, Alexander: Is the Magnus effect applicable to aircraft?

Fleury, de. Influences fondamentales des emplois des métaux légers sur les rendements thermodynamiques et mécaniques des moteurs à explosion. La Techn. Aeron., 16e année, n. s., No. 41 (15 mars 1925), Paris, pp. 82-91.

Floats. Flotteurs ou coque?

L'Aéronautique, 7me année, No. 75 (août 1925), Paris, pp. 281-286, ill.

- See Eula, Antonio: Le prove alla vasca dei modelli dei galleggianti di

idrovolante.

•--See Warner, Edward P.: The calculation of wing float displacement in

single-float seaplanes.

Flow of fluids. See Eustice, J.: Flow of fluids in curved passages.

- See Wrinch, D. M.: Fluid circulation round cylindrical obstacles.

Flugtechnischen Sprechabend. See Matthias: Zum ersten "Flugtechnischen Sprechabend" 1925-26 der Wissenschaftlichen Gesellschaft für Luftfahrt am 27. Oktober 1925.

Fluids. See Bond, Wilfred Noël: An introduction to fluid motion.

- See Burgers, J. M.: The motion of a fluid in the boundary layer along a

plane smooth surface.

- See Camichel: Applications des lois de similitude à l'étude des phénomènes

qui se produisent à l'aval d'un corps immergé dans un fluide visqueux en mouvement.

- See Cisotti, TJ. : Sur les mouvements de rotation d'un liquide visqueux.

- See Dupont, P. : Considérations sur une théorie électrostatique du mouvement des fluides.

- See Kotshin, N.: Ueber starke Diskontinuitäten in einer kompressiblen

Flüssigkeit.

- See Leroux, E.: Sur un paramètre de similitude mécanique dans le mouvement des fluides et son application à l'étude de la cavitation des hélices aériennes.

—— See Low, A. R. : The reaction of a stream of viscous fluid on a rotating circular cylinder.

- See Pannell, J. R.: The measurement of fluid velocity and pressure.

- See Sezawa, Katsutada: A method of analysis of fluid resistance composed of friction and pressure.

- See Taylor, G. J.: Experiments with rotating fluids.

- See Zeilon, N.: On potential problem in the theory of fluid resistance.

Flying. The sport of flying.

The Aeroplane, Vol. 29. No. 4 (July 22, 1925), London, pp. 120, 122.

Flying boats. Metal flying boat has sails to aid control on water. Popular Mechanics, Vol. 44 (July 1925), Chicago, p. 24, ill.

- Shock absorbers for flying boats.

, Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, pp. 386-387, ill., diagr.

- Y'heave ho! for a saucy flying schooner.

Literary Digest, Vol. 87 (Nov. 7, 1925), New York, pp. 70-72, ill.

-■ See Baker, G. S., and E. M. Keary: Experiments with model flying-boat hulls, twenty-fourth series report. Comparison of longitudinal with transverse steps. :

- See Simmonds, O. E. : Recent progress in flying-boat design. ■' i

Fockb-Wulp. The Focke-Wulf type A. 16. An interesting German commercial aeroplane.

Flight, Vol. 17, No. 3 (Jan. 15, 1925), London, pp. 27-28, ill., diagr.

- See Reyneker, F. H. : Het Focke-Wulf verkeersvliegtuig, type A 16.

Fokkbr. Een drie-motorig "Fokker" vliegtuig.

' Het Vliegvcld, 9de Jaarg., No. 10 (Oct. 1925), Amsterdam, pp. 261-263, ill.

- Dutch aircraft construction. Some impressions of a visit to the Fokker

works at Amsterdam.

Flight, Vol. 17, No. 29 (July 16, 1925), London, pp. 449-452, ill.

- First three-engined Fokker. Latest development of F. VII type.

Flight, Vol 17, No. 38 (Sept. 17, 1925), London, pp. 602-603, ill.

- The Fokker C. V.

The Aeroplane, Vol. 28, No, 12 (Mar. 25,1925), London, p. 282, ill.

Fokker. The Fokker FVIIA passenger transport.

Aviation, Vol. 19, No. 14 (Oct. 5, 1925), New York, pp. 441-142, ill.

-- The Fokker-Kansas City Company.

Aviation, Vol. 19, No. 9 (Aug. 31,1925), New York, p. 239, ill.

- The Fokker three-engined monoplane.

The Aeroplane, Vol. 29, No. 12 (Sept. 16, 1925), London, p. 348, ill.

- Fokker VII thrëe-engined commercial monoplane.

Aero Digest, Vol. 7, No. 6 (Dec. 1925), New York, pp. 666, 688.

- Een nieuw Fokker-vliegtuig.

Het Vhegveld, 9de Jaarg., No. 1 (Jan. 1925), Amsterdam, pp. 21-23, ill.

- Les nouveaux avions Fokker. >

L'Aéronautique, 7me année, No. 74 (juil. 1925), Paris, p. 275, ill.

- Premier avion Fokker trimoteur.

L'Aérophile, 33e année, Nos. 17-18 (ler-15 août 1925), Paris, p. 258, ill.

- The thxee-engined Fokker monoplane. The type F VII-3m.

Flight, Vol. 17, No. 52 (Dec. 24, 1925), London, pp. 835-836, ill., diagr.

- Two new Fokker military aeroplanes. The C. VI biplane and the D. XIV

monoplane.

Flight, Vol. 17, No. 18 (Apr. 30, 1925), London, p. 261, ill.

- See Ankel, J. A. : De nieuwe Fokker C-VI.

Ford. The Ford reliability tour.

Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, p. 384. Flight, Vol. 17, No. 48 (Nov. 26, 1925), London, p. 786, ill.

--Ford reliability tour. Rules for entry and complete details.

Slipstream, Vol. 6, No. 9 (Sept. 1925), Dayton, Ohio, pp. 17-18.

-■ Now for the flying flivver.

Literary Digest, Vol. 85, No. 4 (Apr. 25,1925), New York, pp. 12-13, ill.

- Reliability demonstrated by Ford tour.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, pp. 48M86, ill.

- Results of the Ford reliability tour.

Aviation, Vol. 19, No. 16 (Oct. 19, 1925), New York, pp. 550-551.

- Some technical aspects of the planes in the Ford tour.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, pp. 491-193, ill.

- The truth about Ford airways.

The Aeroplane, Vol. 28, No. 19 (May 13, 1925), London, p. 456.

- -See Horn, X. L.: The dedication of Ford Field, Mich.

- See Le Page, W. Laurence: The start of the Ford reliability tour.

- See Mooring mast: The Ford mooring mast.

Ford, Edsel. See.Allen, C. B.: The Ford tour. Ford, Henry. Ford acquires Stout Company.

Aviation, Vol. 19, No. 7 (Aug. 17, 1925), New York, p. 178, ill.

- Henry Ford buys Stout metal airplane company.

U. S. Air Service, Vol. 10, No. 9 (Sept. 1925), Washington, pp. 23-24.

- Henry Ford has started his first regular flying machine route.

U. S. Air Services, Vol. 10, No. 5 (May 1925), Washington, pp. 18-20, ill.

- Ford sees new air epoch.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, p. 486, ill.

-- See Allen, C. B.: The Ford tour.

- See Commercial aeronautics: Big business in the air.

Ford Henry. See Moffett, William A.: Motor trucks with wings.

Ford, Lyman H. See Starr, Alva F. : Leaping into space.

Ford trophy. Commercial airplane reliability tour. Rules for the award of the Ford trophy donated by Edsel Ford.

Aviation, Vol. 19, No. 8 (Aug. 24, 1925), New York, pp. 206-208, ill.

Forestry. Forstschädlingsbekämpfung durch Flugzeuge.

Aut. Mot. Flugw., 7 Jahrg., Nr. 15 (15. Aug. 1925), Berlin, pp. 414-415, ill.

- See Kemp, R. C, C. G. Lewis, C. W. Scott, and C. R. Robbius: Aero-photo survey and mapping of the forests of the Irrawaddy Delta.

- See Lyons, James: Ontario's forest air patrol.

- See Redington, Paul G. : Aerial fire patrol on the national forests.

- See Scott, Wisner Gillette: A suggestion for first-aid aircraft for reforestation of fire-scourged regions.

- See Surveying: Air surveying 15,000 square miles of forest in Burma.

Formation. See Royal Air Force: The Royal Air Force display.

- See "Stewart": Formation flying.

- See Wireless: Wireless and formation flying.

Fradiss, O. Une femme ingénieur d'aéronautique.

L'Aérophile, 33e année, Nos. 17-18 (ler-15 sept. 1925), Paris, p. 26«, port.

France. French airlines actually in service July 1, 1925.

Aviation, Vol. 19, No. 12 (Sept. 21,1925), New York, p. 360.

- Neues aus Frankreich.

Aut. Mot. Fiugw., 7 Jahrg., Nr. 1, 2, 4 (15., 31. Jan., 28. Feb. 1925), Berlin, pp. 20-21, 50-51, 106, ill.

- New French deck fliers.

Aviation, Vol. 19, No. 1 (July 6,1925), New York, p. 8.

- On France and world politics.

The Aeroplane, Vol. 29, No. 10 (Sept. 2,1925), London, pp. 281-286.

- The organization of the French air service.

Aviation, Vol. 19, No. 19 (Nov. 9, 1925), New York, pp. 674 675, ill.

Technical development and procurement for army and navy administered by separate departments.

- Strength of French air force.

Aviation, Vol. 18, No. 12 (Mar. 23,1925), New York, p. 319.

- See Gliders: French gliders make records,

- See Leroux: L'organisation technique officielle de l'Aéronautique aux

Etats-Unis en Angleterre et en France.

- See Orcy, Ladislas d': French air expansion in South America.

- See Orcy, Ladislas d': Recent French pursuit airplanes described.

- See S. H.: L'aviation française en 1924.

France-Germany. Les relations aéronautiques franco-allemandes. L' Aéronautique, 7me année, No. 70 (mars 1925), Paris, pp. 81-82.

Frazer, R. A., A. S. Batson, and A. G. Gadd. Experiments on a model of a Bristol fighter aeroplane (1/lOth scale). Section 2. Lateral derivatives by the forced oscillation method.

Aeronautical Resoareh Committee, Reports and Memoranda, No. 932 (Ae. 153), October 1924, London, 1925, pp. 12-40, ills., diagrs., tabls.

Prazbh, R. A. On the motion of circular cylinders in a viscous fluid.

Philosophical Transactions, Royal Society of London, Vol. 225, No. A 628 (June 26, 1925), London, pp. 93-130, ill.

- The rigid airship in relation to full-scale experiment.

Journ. Roy. Aer. Soc, Vol. 29, No. 177 (Sept. 1925), London, pp. 404-458, ill. Reviewed In: Nature Vol. 116, No. 2930 (Oct. 17, 1925), London, p. 586.

- See Pannell, J. R.: The measurement of fluid velocity and pressure.

Edited by R. A. Frazer with foreword by R. V. Southwell.

Fréchet, Charles. Le développement des hélices métalliques Reed.

L'Aéronautique, 7me année, No. 74 (Juil. 1925), Paris, pp. 273-274, ill.

Freeman, R. G. Air-flow investigation for location of angle of attack head on a JN4h airplane.

National Advisory Committee for Aeronautics, Technical Notes No. 222, August 1925, Washington, pp. 13. ill.

- See Crowley, J. W., jr., and R. G. Freeman; Determination of turning

characteristics of an airship by means of a camera obscura.

Freudenberq, L. Der Flettner-Rotor.

Berliner-Tageblatte, Technische Rundschau (Dec. 25, 1924).

Fretssinet. Concrete airship sheds at Orly, France. Part I. General aspect of the problem. Basic principles of the final project. Principal structural elements.

National Advisory Committee for Aeronautics, Technical Memorandums No. 332, Oct. 1925. Washington, pp. 40, ills. Mailed Oct. 5, 1925. From "Le Genie Civil," Sept. 22 and 29, 1923.

- Concrete airship sheds at Orly, France. Part II. Supporting structure

and method of moving. Mechanism for moving the centering apparatus for handling the materials. Remarks on construction details.

National Advisory Committee for Aeronautics, Technical Memorandums No. 333, Oct. 1925, Washington, pp. 39, ills. Prom "Le Genie Civil," Sept. 29 and Oct. 6, 1925.

Frieumann, A. See Keller, L., und A. Friedmann: Differentialgleichungen für die turbulente Bewegung einer Kompressibelen Flüssigkeit.

Frothinqham, L. A. Helium gas and dirigibles.

Independent, Vol. 115 (Oct. 10, 1925), New York, pp. 413-414, ill.

Fuchs, R., und H. Blenk. Die Beanspruchung von Flugzeugen beim Abfangen. Zeltschr. Flugt. Mot., 16. Jahrg., 3. Heft (14. Feh. 1925), München, pp. 78-86, ill.

Fuel. See Fenning, R. W.: Closed vessel explosions of mixtures of air and liquid fuel (petrol, hexane, and benzene) over a wide range of mixture strength, initial temperature, and initial pressure.

- See Kuehn, R.: Atomization of liquid fuels. Part I. Relation between

atomization and combustion. Methods employed for determining the size of particles and small drops. Choice of experimental method. ,

- See Kuehn, R.: Atomization of liquid fuels. Part II. Description of

apparatus. Fuels tested. Atomization experiments. Discharge measurements atomization.

- See Kuehn, R.: Atomization of liquid fuels. Part III. Critical discussion

of experimental results mixing the atomized fuel with air.

- See Matthews, Robertson: Discharge characteristics of a high-speed fuel-injection system.

- See Praetorius, K. R.: The problem of fuel measurement (The Schiske

"Konsummeter").

Fuel. See Tausz, J., and F. Schulte: Determination of ignition points of liquid fuels under pressure.

Fuel strainers. See Zimmerman, A. C, and E. R. Irwin: The clogging of fuel strainers.

Fueling. See Arnold, H. H.: Contact and refueling now accomplished in the air.

Fullam, W. F. Admiral Sims says aircraft dooms battleships.

Aero Digest, Vol. 7, No. 3 (Sept. 1925), New York. pp. 463-464. 508, ill.

- Our air navy.

Aero Digest, Vol. 6, No. 6 (June 1925). New York, pp. 299-300, ill.

Fullerton, J. D. The flight of birds.

Journ. Eoy. Aer. Soc., Vol. 29, No. 178 (Oct. 1925), London, pp. 535-547.

Fuselage. See Pressure distribution: Pressure distribution on fuselage of airplane model.

- See Warner, Edward P.: Wind-tunnel tests of fuselages and wind shields.

G

G-EBBX. The report on the English crash.

Aviation, Vol. 18, No. 12 (Mar. 23,1925) New York, pp. 322-323.

Gauant, R. Les systèmes amortisseurs dans les trains d'atterrissage. Pneumatiques, roues et extenxeurs.

La Techn. Aéron., 16e année, n. s., No. 49 (15 nov. 1925), Paris, pp. 334-347, ill.

Gadd, A. G. See Cowley, W. L., A. G. Gadd, L. J. Jones and Sylvia W. Skan: Biplane investigation with R. A. F. 15 section. Part III. Tests at various staggers and gap chord ratios.

- See Frazer, R. A., A. S. Batson, and A. G. Gadd: Experiments on a model

of a Bristol fighter aeroplane (l/10th scale). Section 2. Lateral derivatives by the forced oscillation method.

Gadolin, C. A. J. The possibilities of civil air traffic in Finland. Finnish Trade, (June 1925).

i !

Gaqnotto, Luigi. La nave porta-velivoli.

L'Aerotecnica, Vol. 5, N. 3 (Maggio-Giugno 1925), Pisa, pp. 137-159, ill.

Galante, Nicolô. Sulla determinazione della posizione geografica dell 'aero-mobile. ■

Rend. Techn. Dir. Sup. Genio Costr. Aer., Anno 13, N. 3 (15 Marzo 1925), Roma, pp. 32-39, diagrs.

Gallup, Christopher M. Insurance and flight.

National Aeronautic Association Review, Vol. 3, No. 2, 5 (Feb., May, 1925), Washington, D. C, p. 26, 77.

Gap chord. See Cowley, W. L., A. G. Gadd, L. J. Jones and Sylvia W. "Skan: Biplane investigation with R. A. F. 15 section. Part III. Tests at various staggers and gap/chord ratios.

Garber, Paul EnwARn. Army flyer first in Schneider trophy races.

u. S. Air Services, Vol. 10, No. 12 (Dec. 1925), Washington, pp. 16-19, ill.

- The 1925 International air races. - '•

u. S. Air Services, Vol. 10, No. 11 (Nov. 1925), Washingtop, pp. 37-43, ill.

Gardner, L. D. Who's Who in American aeronautics. New York, Gardiner Publishing Co., 1925, ill.

Gabi, R. Toy airplane project.

School Arts Magazine, Vol. 24, (Dec. 1924), Worcester, Mass., pp. 248-250, diagr.

Garibaldi, Peppino. Will airplanes end war?

Aero Digest, Voi. 7, No. 2 (Aug. 1925), New York, pp. 411-412, 450, ill.

Garner, H. M., and E. T. Jones. Full scale tests of different ailerons on Bristol fighter aeroplane.

Aeronautical Research Committee, Reports and Memoranda, No. 956 (Ae. 182.), January 1925, London, 1925, pp. 7, ill., diagrs., tabls.

Garner, H. M., and W. G. Jennings. The variation of engine power with height.

Aeronautical Research Committee, Reports and Memoranda, No. 961 (E. 14.), September

1924, London, 1925, pp. 3, ills., diagrs.

Garner, H. M. See Gates, S. B., and H. M. Garner: A theory of the full-scale determination of damping in roll.

Garros, Roland. L'inauguration provisoire du monument Roland Garros. L'Aérophile, 33e année, Nos. 23-24 (ler-15 dec. 1925), Paris, pp. 354-356, ill.

Gas. Condensatore del vapore d'acqua contenuto nei gas di scarico motori di aviazione.

Rend. Teen. Dir. Sup. Oenio Costr. Aer., Anno 13, No. 3 (15 Marzo 1925), Roma, pp. 39-41, ill.

- See Biquard, R., and A. Chenu: Procédé de régénération du gaz des

dirigeables évitant leur dégonflement.

Gasoline pumps. See Royal Aircraft Establishment: Tests of R. A. E. gearwheel type petrol pump.

Gates, H. L. Planes and journalism.

Aero Digest, Vol. 6, No. 2 (Feb. 1925), New York, pp. 89-90, 102, map.

Gates, S. B., and H. M. Garner. A theory of the full-scale determination of damping in roll.

Aeronautical Research Committee, Reports and Memoranda, No. 938, (Ae. 159), September 1924, London, 1925, pp. 14, tables., diagrs.

Gebers, Friedrich. Law of similitude for the surface resistance of lacquered planes moving in a straight line through water.

National Advisory Committee for Aeronautics, Technical Memorandums No. 308, April

1925, Washington, pp. 75, ill., tabls., diagrs.

From "Schiffbau," Vol. 22, 1021, Nos. 29, 30, 31, 32, 33, 35 and 37.

Generator problems. See Allen, J. W. : Generator problems due to crank shaft vibrations.

Gentzcke. Structural methods employed by the Schütte-Lanz Airship Company.

National Advisory Committee for Aeronautics, Technical Memorandums No. 313, May 1925, Washington, pp. 71, ill. From "Zeitschrift für Flugtechnik und Motor luftschiffehrt," May 15, 1924.

Geographical position. See Galante, Nicolö: Sulla determinazione della posizione geografica dell' aeromobile.

Geological Survey. See Smith, George Otis: Geological Survey in the air.

Georgii, Walter. Die obere Negrenzung der abgelenkten Luftströmung an Hindernissen. (Zur Frage der " Einflusshöhe.-") '

Zeitschr. Flugt. Mot., 16. Jahrg., 4. Heft (28. Feb. 1925), München, pp. 105-108, ill.

---Die Wettervorhersage; die Fortschritte der synoptischen Meteorologie.

(Wissenschaftliche Forschungsberichte, Naturwissenschaftliche Reihe, herausgegeben von Dr. E. Liesegang. Bd. XI.) Dresden und Leipzig, Th. Steinkopff, 1924.

Georgii, Walter. See Poeschel, Johannes: Einführung in die Luftfahrt.

Gerhardt, W. F. What chance has the aeronautical engineer. Including a brief review of flight history.

Slipstream, Vol. 6, No. 1 (Jan. 1925), Dayton, Ohio, pp. 16-20, ill.

German Standards Industrial Committee. See Lehl, Max.: Dinormen an Luftfahrzeugen.

Germany. Le "circuit aérien" allemand de 1925.

L'Aerophile, 33e année, Nos. 11-12 (ler-15 juin 1925), Paris, pp. 169-170, ill.

- Les circuits des airs allemands.

L'Aéroneutique, 7me année, No. 74 (juil. 1925), Paris, pp. 250-252, ill.

- Zum Deutschen Rundflug.

Aut. Mot. Flugw., 7. Jahrg., Nr. 2 (31. Jan. 1925), Berlin, pp. 49-50, ill.

--Deutscher Seeflugwettbewerb 1926.

Aut. Mot., Flugw., 7. Jahrg., Nr. 23 (15. Dez. 1925), Berlin, pp. 602-663, ill.

- De Duitsche rondvlucht.

Het Vliegveld, 9de Jaerg., No. 7 (Juli 1925), Amsterdam, pp. 189-19C.

- Enkele beschouwingen over het Duitsche luchtverkeer.

Het Vliegveld, 9de Jaarg., No. 11 (Nov. 1925), Amsterdam, pp. 294-296, map.

- German air lines in 1925.

The Aeroplane, Vol. 29, No. 4 (July 22,1925), London, pp. 126, 128.

- German air services during 1924.

Aviation, Vol. 18, No. 13 (Mar. 30,1925), New York, p. 355.

- German aviation and allied restrictions.

Flight, Vol. 17, No. 29 (July 16, 1925), London, p. 457.

- Germany to train 2,000 pilots.

Aviation, Vol. 18, No. 9 (Mar. 2, 1925), New York, p. 243.

- Les nouvelles regis de discrimination des avions militaires pour. l'Allemagne.

L'Aerophile, 33e année, Nos. 13-14 (ler-18 juil. 1925), Paris, p. 194.

-■ On Germany's commercial aviation.

The Aeroplane, Vol. 28, No. 20 (May 20, 1925), London, pp. 479-480.

-• Progress of civil aviation in Germany.

Flight, Vol. 17, No. 17 (Apr. 23, 1925), London, p. 244.

- Progress of commercial aviation in Germany.

Aviation, Vol. 19, No. 25 (Dee. 21, 1925), New York, p. 884.

- The results of the German cross-country race.

Aviation, Vol. 19, No. 6 (Aug. 10,1925), New York, pp. 148-149, ill., map.

- The round-Germany flight. Ninety-one airplanes to start on Sunday.

Flight, Vol. 17, No. 22 (May 28, 1925), London, pp. 317-326, map, ill.

- The round-Germany flight. Some preliminary results.

Flight, Vol 17, No. 25 (June 18,1925), London, pp. 370-372, ill.

- The round-Germany flight. Technical equipment.

Flight, Vol. 17, No. 24 (June 11, 1926), London, pp. 354-360, ill.

- Some impressions of the round-Germany flight.

Flight, Vol. 17, No. 23 (June 4,1925), London, pp. 336-345, 111. ■ >

- See Aero-Lloyd: Deutscher Aero-Lloyd A.-G.

-— See Brandenberg: Die Lage der deutschen Luftfahrt.

- See Breuer, R.: Der deutsche Luftverkehr im Jahre 1925.

Germany. See Deutscher Rundflug 1925: "Deutscher Rundflug, 1925." A wonderful German competition.

- See Focke-Wulf: The Focke-Wulf type A. 16. An interesting German

commercial aeroplane.

- See Heinkel: The Heinkel H. E. 18 sports monoplane. A new German

low-power two-seater.

- See Hofmann, Rich.: Deutscher Rundflug 1925.

- See Junkers: Die Junkers-Flugzeuge im deutschen Rundflug 1925.

- See Katz, Herman: Air situation in Germany.

- See Krupp, G.: Was brachte die Deutsche Automobil-Ausstellung für

die Luftfahrt.

- See Macholz, Gustav E. : Der deutsche Rundflug.

- See McLaughlin, George F.: 'Round-Germany flight.

- See Morris, Joseph: The German air raids on Great Britain 1914-1918.

- See Niemann, Franz: Rund um den Deutschen Rundflug, 1925.

- See Orlovius: Die Bedrohung des deutschen Flugverkehrs.

- See Rockenfeller, Walther: Die Wirtschaftlichkeit als Grundgedanke der

Wertung im Deutschen Rundflug 1925.

Germany-France. See France-Germany: Les relations aéronautiques franco-allemandes.

Gersfeld. See Haack, Herbert: Ein Gang durch die Fliegerschule in Gersfeld (Röhn).

Giacomelli, R. Dirigibili rigidi e semirigidi.

Ingegnerla, Anno 4, N. 9 (Set. 1925).

- Esperimenti d'atterraggio di dirigibili con mezzi propri.

L'Aeroteenica, Vol. 5, No. 4 (Luglio-Agosto 1925), Pisa, pp. 229-242, ill.

Gibraltar. See Edwards, Davis: Gibraltar shorn of strength. Gilbert, C. W. Mitchell and the air service.

Review ol Reviews, Vol. 71 (April 1925), New York, pp. 374-381, ill.

Gilles, G. Les moteurs des circuits des airs allemands.

L'Aéronautique, 7me année, No. 75 (août 1925), Paris, pp. 288-290, ill.

Gillette, L. S. Rickenbacker enters aircraft field with 75-horsepower radial engine.

Automotive Industries, Voi. 63, No. 25 (Dee. 17, 1925), New York, pp. 1011-1012, ill.

Gillman, H. R. Carrying goods by air.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, pp. 43,46.

Gilmore, W. L. Testing the Pulitzer racers.

Aero Digest, Vol. 7, No. 3 (Sept. 1925), New York, pp. 573, 508, ill.

Giovanni, S. See Breda 4, 120 c. v. : Prova elastica di rottura delT apparecchio Breda 4, 120 c. v. eseguita a sesto S. Giovanni il 7 Agosto 1925 (apparecchio scuola a posti affiancati).

Glauert, H. Calculation of the rotary derivatives due to yawing for a monoplane wing.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 313-321, ill., diagr. Reports and Memoranda, No. 866. February, 1923. (Ae. 103.)

Glatjert, H. The efficiency of a tandem system of air screws.

Aeronautics. Techn. Kep. Aer. Kes. Com., 1923-24, Vol. 1, London, 1925, pp. 334-341, tabla. Reports and Memoranda, No. 881. May, 1923. (Ae. 112.)

'- Experimental tests of the vortex theory of aerofoils.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 169-172, , diagrs.

- The interference of wind channel walls on the aerodynamic characteristics

of an aerofoil. ,

Aeronautics. Tech. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 118-124.

Glatjert, H., and A. S. Hartshorn. The interference of wind channel walls on the downwash angle and the tail-setting to trim.

Aeronautical Research Committee, Reports and Memoranda, No. 947 (Ae. 167), November 1924, London, 1925, pp. 9, diagrs., tabls.

Glatjert, H. Notes on the vortex theory of air screws.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 322-327, ill., diagr. Reports and Memoranda, No. 869. December, 1922. (Ae. 105.)

- The rolling and.yawing moments of an aerofoil in straight flight.

Aeronautical Research Committee, Reports and Memoranda, No. 980 (Ae. 193), July, 1925, London, 1925, pp. 5.

- Theoretical relationships for a biplane.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 173-182, diagrs. Reports and Memoranda, No. 901. December, 1923. (Ae. 131.)

--The theory of the design of aerofoils, with an analysis of the experimental

' results for the aerofoils R. A. F. 25, 26, 30 to 33.

Aeronautical Research Committee, Reports and Memoranda, No. 946 (Ae. 166), November 1924, London, 1925, pp. 7, diagrs.

- See Clark, B. D., L. P. Coombes, H. Glauert, and A. S. Hartshorn: Lift

and drag of Junker monoplane. Comparison of model with full-scale results.

- See Simmons, L. F. G., and E. Ower: An investigation of the downwash

in the slipstream (Part I). With appendix by H. Glauert.

Glendinning, W. G. . Report on the use of artificial sources of light as a substitute in the weathering of fabric: Part 1.

Aeronautical Research Committee, Reports and Memoranda, No. 974 (M. 29), July, 1925 London, 1925, pp. 5, ill.

Glidden tour. The aerial " Glidden Toiir."

Slipstream, Vol. 6, No. 6 (June 1925), Dayton, Ohio, pp. 7-9

Gliders. The construction of a glider.

Aviation, Vol. 18, Nos. 25-26 (June 22-29, 1925), New York, pp. 696-697, 726-727, diagr.

-- French gliders make records.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, pp. 616, 639, ill.

- Glider competitions in Russia.

Flight, Vol. 17, No. 2 (Jan. 8,1925), London, pp: 15-16, ill.

- Light plane and glider notes.

Flight, Vol. 17, No. 20 (May 14, 1925), London, pp. 287-290, ill.

- See McLaughlin, George F. : The Nordman monoplane glider.

Gloster. Two "Gloster" machines. The "Grouse II" and the "Grebe II."

Flight, Vol. 17, Nos. 46-47 (Nov. 12-19,1925), London, pp. 743-746. 763-767, 111., diagr.

Gloster-Napier III. The builders of the Gloster-Napier III.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, p. 583, ill.

- The Glosters at Felixstowe.

The Aeroplane, Vol. 29, No. 13 (Sept. 23, 1925), London, pp. 368-372, ill.

Gloster II. The accident to the Gloster II.

Flight, Vol. 17, No. 25 (Juno 18,1925), London, p. 374, ill.

Glover, W. Irving. W. I. Glover to be new air mail chief.

Aviation, Vol. 18, No. 24 (June 15, 1925), New York, p. 669, ill.

Goebel, J. Afrika zu unsern Füssen.

Leipzig, Verlog von E. F. Koahler, 1925, pp. iv, 124, ill.

GöTTiNQEN. Vorläufige Mitteilungen der Aerodynamischen Versuchsanstalt zu Göttingen.

München und Berlin Haft 3, Hett 4,1925.

- See Ackeret, J.: Neuere Untersuchungen der Aerodynamischen Versuchsanstalt, Göttingen.

- See Ackeret, J. : Recent experiments at the Göttingen aerodynamic

institute.

Gold mining. See Chicanot, E. L. : Into the golden north. Air transportation an essential factor in Canadian gold mining.

Gold-beater's skin. See Chollet, L.: Les étoffes baudruchées en aérostation.

Goodyear. Inaugural flight of Goodyear Pilgrim.

Aviation, Vol. 19, No. 8 (Aug. 24, 1925), New York, p. 214, ill.

- See Kraft, H. T.: Description of the Goodyear Pilgrim.

Gordon-Bennett. La deuxième Coupe Gordon-Bennett.

L'AêrotechniquB (L'Aéronautique, 7me année, No. 74), 3me année, Num. 31 (jull. 1925), Paris, p. 264. map.

- Gordon Bennett results.

Aviation, Vol. 19, No. 2 (July 13,1925), New York, p. 43.

- Regulations for the Gordon Bennett Cup.

Aviation, Vol. 18, No. 11 (Mar. 16,1925), New York, p. 300.

- La seconde Coupe Gordon-Bennett.

L'Aérophile, 33e année. Nos. 11-12 (ler-15 juin 1925), Paris, pp. 166-168, ill., map.

Gore, Howard M. Aircraft and the Department of Agriculture.

National Aeronautic Association Renew, Vol. 3, No. 5 (May, 1925), Washington, D. C, pp. 67-72.

Gosslatj, F. Flugmotoren auf der neunten Pariser Luftfahrtausstellung.

Zeltschr. Ver. deutsch. Ing., Bd. 69, Nr. 42 (17 Okt. 1925), Berlin, pp. 1325-1329, ill.

Gotjgh, H. J. The effect of key ways upon the strength and stiffness of shafts subjected to torsional stresses.

Aeronautical Research Commlttea, Reports and Memoranda, No. 864 (M. 22), April 1925, London, 1925, pp. 20, ill.

Gourdotj, C. La mesure des records d'altitude.

L'Aéronautique, 7me année, No. 74 (juil. 1925), Paris, pp. 243-244, diagrs.

Goys. La mission aérienne centre-Afrique.

L'Aérophile, 33e année, Nos. 7-8 (ler-16 avril 1925), Paris, pp. 103-108, ill., map.

- Le voyage d'étude de la mission de Goys.

L'Aéronautique, 7me année, No. 70 (mars 1925), Paris, p. 82.

Grab winch. The "Grab winch."

Slipstream, Vol. 6, No. 9 (Sept. 1925), Dayton, Ohio, p. 11, ill.

Graffigny, Henry de. L'aéronautique et l'aviation.

Paris, Alhin-Mlchal éditeur.

- Camille Flammarion.

L'Aérophile, 33e année, Nos. 11-12 (ler-16 Juin 1925), Paris, pp. 183-184, port.

Grain, R. lb. Contribution à la sécurité dispositif permettant de déboucher instantanément les gicleurs obstrués sans démontage du carburateur et arrêt du moteur.

L'Aérotechnique (L'Aéronautique, 7me année, No. 71), 3me année, Num. 28 (avril 1926), Paris, pp. 143-144, ill.

Grard, Charles. Influence de la zone thermique de travail sur la sélection des aciers pour soupapes de moteurs d'aviation.

C. E. Acad. Sel., T. 181, No. 26 (28 dêc. 1925), Paris, pp. 1143-1145.

Gbaybeal, C. W. Bombing the Navy; a pilot tells his story.

Independent, Vol. 114, (Mar. 7, 1925), New York, pp. 263-264.

Great Britain. The air estimates. A net increase of £652,000.

Flight, Vol. 17, No. 9 (Feb. 26, 1925), London, pp. 113-116.

- The air estimates debates.

Flight, Vol. 17, No. 12 (Mar. 19, 1925), London, pp. 165-168.

- Annual report of the meteorological committee to the Air Council, for the

year ended March 31, 1925.

London, H. M. Stationery Office.

- Britain's new airships to dwarf all others.

Literary Digest, Vol. 84, No. 5 (Jan. 31, 1925), New York, pp. 49-52.

- On the air debate.

The Aeroplane, Vol. 28, No. 9 (Mar. 4, 1925), London, pp. 196-200.

- On the second air debate.

The Aeroplane, Vol. 28, Nos. 11-12 (Mar. 18-25, 1925), London, pp. 246-250, 270-272.

- Report of the formal investigation of the accident to the aircraft G—EBBX

at Croydon on the 24th December, 1924, held under the Air Navigation (investigation of accidents) regulations, 1922.

London, H. M. Stationery Office, [Printed by Eyre and Spottiswoode, ltd.J, 1925, p. 12. Parliament. Papers by command. Cmd. 2351.

- What is wrong with British civil aviation?

The Aeroplane, Vol. 29, Nos. 18-19 (Oct. 28-Nov. 4, 1925), London, pp. 612-514, 542-544.

- See Air Ministry: Air Ministry tests for aero engines.

- See England: England prescribes difficult tests for airplane engines.

-- See Fairey works: Great Britain's largest aircraft factory. Impressions

of a visit to the Fairey works.

- See Grey, Charles Grey: Album of British aircraft.

- See Hoare, Samuel: Our air policy. Sir Samuel Hoare's speech in Commons.

- See Hodgson, J. E.: The history Of aeronautics in Great Britain.

- See M. L.: La réorganisation des forces aériennes britanniques.

- See Mail: British air mails in 1924.

- See Morris, Joseph: The German air raids on Great Britain 1914-1918.

- See Trenchard, Hugh: The air defenses of Great Britain.

- See Van Zandt, J. Parker: Preliminary report on British commercial

aeronautics. ,

Greece. Aircraft developments in Greece.

The Aeroplane, Vol. 28, No. 4 (Jan. 28, 1925), London, pp. 70, 74.

Geben, Maukice W. Determination of the lift and drag characteristics of an airplane in flight.

National Advisory Committee for Aeronautics, Technical Notes No. 223, August 1925, Washington, p. 16, 111.

Greene, Howard E. Make way for the New York-Chicago night air mail. u. S. Air Services, Vol. 10, No. 7 (July 1926), Washington, pp. 10-16, ill.

- This year's races to be greatest of all.

u. S. Air Services, Vol. 10, No. 10 (Oct. 1926), Washington, pp. 26-30, ill.

Gregg, David. Gear-driven plane supercharger passes Dayton air tests.

Automotive Industries, Vol. 63, No. 22 (Nov. 28, 1925), New York, pp. 906-908, ill.

- Superchargers.

Aviation, Vol. 19, No. 4 (July 27, 1925), New York, pp. 90-92, ill.

Gregg, Willis Ray. Aeronautical meteorology.

New York, Ronald Press Co., 1925, pp. xii, 144.

- Chasing weather secrets in airplanes.

Aero Digest, Vol. 7, No. 2 (Aug. 1925), New York, pp. 421-422, 111.

Grey, Charles Grey. Album of British aircraft. London, The Aeroplane, 1924.

- All the world's aircraft, 1925. Edited by Charles Grey Grey.

London, Sampson, Low, Merston and Co., 1925, p. 300, ill.

- Civil aviation in the United States.

Aviation, Vol. 18, No. 1 (Jan. 5, 1925), New York, pp. 16-17.

- On the outlook.

The Aeroplane, Vol. 28, Nos. 1-5 (Jan. 7-Feb. 4, 1925), London, pp. 1-4, 21-22, 45, 69-70, 93-96.

- The status of the Royal Air Force.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, p. 582, ill.

Griffith, A. L., and A. W. Porter. On eddies formed behind apertures through which air is streaming.

London, Edinburgh and Dublin Philosophical Magazine and Jouranl of Science, Vol. 49, No. 292 (April 1925), London, pp. 649-662, ill.

Griffiths, J. C. See Jones, B. Melvill, and J. C. Griffiths: Aerial surveying by rapid methods.

Guggenheim, Daniel. Daniel Guggenheim founds school of aeronautics. u. S. Air Services, Vol. 10, No. 7 (July, 1925), Washington, p. 36.

- Daniel Guggenheim school of aeronautics.

Science, n. s., Vol. 61, (June 19, 1925), Garrison, N. Y., p. 626.

- Daniel Guggenheim's gift to aviation. Gives $500,000 to found school of

aeronautics.

The Ace, Vol. 6, No. 2 (July 1925), Glendale, Calif., p. 7.

- See Marshall, Edward: Daniel Guggenheim says we must not let air

supremacy slip.

Guibbrt, Michel. Le phare du Mont Afrique.

L'Aérotechnique (L'Aéronautique, 7me année, No. 78), 3me année. Num. 35 (nov. 1925), Paris, pp. 417-420, ill

Guiche, A. de Gramont de. Indicateur acoustique de vitesse relative pour aéronef.

C. R. Acad. Sel., T. 179, No. 26 (29 déc. 1924), Paris, pp. 1691-1693, ill. L'Aerophile, 33eannée, Nos. 5-6 (ler-15 mars 1925), Paris, p. 76, ill.

Guidoni, Alessandro. Ricordi di idro aviazione 1909-1921.

Rend. Teen. Dir. Sup. GenioCostr. Aer., Anno 13, N.3 (15Marzo 1925), Roma, pp. 5-12,111.

Gymnich, Alfried. Flettner-Rotor und Flugtechnik.

Zeitschr. Flugt. Mot., 16. Jahrg., 9. Heft (14. Mal 1925), München, pp. 194-196, ill. 53466—28-6

Gymnich, Alpred. Der Gleit- und Segelflugzeugbau.

Berlin, R. C. Schmld Co., 1925.

(Bibliothek, für Luftschiffahrt und Flugtschmik. Bd. 24.) pp. 226, ill. • Gyroscopes. »See Backer, J. W. F.: Het automatische vliegtuig.

- »See Beth, H. J. E.: The stabilisation of instable equilibrium by means

of gyroscopic forces.

- »See Biondi, Luigi: II girostato nelle sue applicazioni agli istrumenti di

navigazione aerea.

- »See Instruments: A new gyroscopic turn indicator.

- »See Schilowsky, P.: The gyroscope.

- »See Smith: Smith's gyro turn indicator.

H

H.-N. A. C. C. De "blijdeincomste" van de bemanning der H.-N. A. C. C. Het Vliegveld, 9 de laarg,. No. 4 (April 1925), Amsterdam, pp. 96-100, ill.

Haack, Herbert. Ein Gang durch die Fliegerschule in Gersfeld (Röhn). Aut. Mot. Flugw., 7. Jahrg., Nr. 8 (30. April 1925), Berlin, p. 219.

Habicht. »See Blume, Wa.: Der "Habicht."

Haquenau, D. Le régime financier des services publics de transports aériens eu France et à l'étranger.

L'Aéronautique, 7me année, No. 76, 78 (sept.-nov. 1925), Paris, pp. 321-324, 432-435.

Hahn, È. Notes sur l'application aux turbomachines des théories modernes de l'hydronamique.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 427-431.

Haiq, R. A. de H. Notes on the flying qualities of the light aeroplane compared with larger types.

Journ. Roy. Aer. Soc, Vol. 29, No. 177 (Sept. 1925), London, pp. 459-464.

Hall, R. F. A scheme of aerial bombardment.

Aviation, Vol. 18, No. 17 (Apr. 27, 1925), New York, p. 467.

Hammond, John Hays, Jr. »See Commercial Aeronautics: Big business in the air. '

Handley Paoe. The Handley Page Hampstead.

The Aeroplane, Vol. 29, No. 18 (Oct. 28,1925), London, p. 516, ill.

- The new Handley Page air liner.

Aviation, Vol. 19, No. 20 (Nov. 16, 1925), New York, pp. 713-714, ill.

t ____

- The new Handley Page W. 9 " Hampstead." Three Armstrong-Siddeley

"Jaguar" engines.

Flight, Vol 17, No. 40 (Oct. 1, 1925), London, pp. 625-628, ill., diagr.

Hangars. Housing the air mail.

Aviation, Vol. 18, No. 20 (May 16, 1926), New York, p. 547, ill. '

- »See Duval, A.-B.: Le problème de l'aérodrome dégagé au maximum.

-- »See Freyssinet: Concrete airship sheds at Orly, France. Part I. General'

aspect of the problem. Basic principles of the final project. Principal structural elements.

- »See Freyssinet: Concrete airship sheds at Orly, France. Part II. Supporting structure and method of moving. Mechanism for moving the centering apparatus for handling the materials. Remarks on construction details.

Hann-Süring. Lehrbuch der Meteorologie. Leipzig, Chr. H. Tauchnitz.

Hanbiot. The Hanriot pursuit planes.

Aviation, Vol. 18, No. 1 (Jan. 5, 1925), New York, p. 16.

Harpes, H. New era for air passengers.

Travel, Vol. 45 (Oct. 1926), New York, p. 46.

--New gospel of the air.

Contemporary Eeview, Vol. 126 (Nov. 1924), New York, pp. 603-612. Living Age, Vol. 324 (Feb. 7, 1925), Boston, pp. 317-324. Nation, Vol. 120 (Jen. 7, 1925), New York, pp. 5-6.

Harris, R. G., and L. E. Caygill. Further experiments on honeycomb radiators.

Aeronautical Research Committee, Reports and Memoranda, No. 952 (Ae. 171), November, 1924, London, 1925, p. 20, ills., diagrs., tabls.

Harris, R. G., and W. K. Alford. Wind channel tests on radiators.

Aeronautical Research Committee, Reports and Memoranda, No. 934 (Ae. 155), August, 1922, London, 1926, p. 16, ill., diagrs., tabls.

Harris, R. G. See Kermode, A. C, and R. G. Harris: Full scale and model measurements of pressure distribution round one rib of a B. E. 2C aeroplane with R. A. F. 15 section.

- See Kermode, A. C, B. D. Clark, and R. G. Harris: Full scale and model

measurements of pressure distribution round two ribs of a B. E. 2E aeroplane with R. A. F. 19 section.

Harrison, George B. The Slate rigid airship.

The Ace, Vol. 6, No. 2 (July 1925), Glendale, Calif., p. 9.

Hart, Ivor Blashka. Makers of science. London, Clarendon Press, 1925.

- Mechanical investigations of Leonardo da Vinci.

Chicago, Open Court Pub. Co., 1925, pp. vil, 240, ill. London, Chapman & Hall, 1925, pp. 284, ill.

Hartney, Harold E. Chance for a Harriman.

Independent, Vol. 114 (Mar. 28,1925), New York, pp. 355-356.

- Sikorsky air transport.

Aero Digest, Vol. 6, No. 4 (April 1925), New York, p. 204, 111.

- You can't make taxis of war planes.

Collier's, Vol. 75 (Apr. 4, 1925), Springfield, Ohio, p. 25.

Hartshorn, A. S. See Bradfield, F. B., and A. S. Hartshorn: Test of three aerofoils suitable for high speed. A. D. 1, Sloane, and R. A. F. 26.

- See Clark, B. D., L. P. Coombes, H. Glauert and A. S. Hartshorn: Lift

and drag of Junker monoplane. Comparison of model with full-scale results.

- See Douglas, G. P., F. B. Bradfield, and A. S. Hartshorn: The lateral

control of a biplane by combined use of ailerons and varying leading edge slots.

- See Glauert, H., and A. S. Hartshorn: The interference of wind channel

walls on the downwash angle and the tail setting to trim.

Hatfield, W. H. Steels used in aero work.

Journ. Roy. Aer. Soc, Vol. 29, No. 178 (Oct. 1925), London, pp. 469-534, ill

Hawaii. Aircraft and the Hawaiian maneuvers.

Aviation, Vol. 18, No. 25 (June 22,1926), New York, pp. 690-691.

- Hawaiian fliers saved.

Aero Digest, Vol. 7, No. 4 (Oct. 1925), New York, p. 634, ill.

Hawaii. The Hawaiian flight.

National Aeronautic Association Review, Vol. 3, No. 10 (Oct. 1925), Washington, D. 0., p. 149.

- Navy ready for Hawaiian flight.

Aviation, Vol. 19, No. 7 (Aug. 17, 1925), New York, pp. 174-175, ill.

- Planes ready for flight to Hawaii.

The Ace, Vol. 7, No. 2 (Sept. 1925), Glendale, Calif., p. 7, 111.

- See Boles, Thomas: Volcano destroys landing field.

- See Brant, Gerald: What really happened in Hawaiian maneuvers.

- See Chellgard, W. R.: Aircraft's important röle at Hawaii.

- See Coleman, Charles H.: Given up as lost, Navy Hawaiian flight plane

found after nine days.

- See Hinkley, Vern.: Hawaii hard at work creating landing fields.

- See Hinkley, Vern.: Hawaii the scene of great air activity.

Hawker. The Hawker Engineering Company.

Flight, Vol. 17, No. 11 (Mar. 12, 1925), London, pp. 151-152, ill.

- A visit to the Hawker Company.

The Aeroplane, Vol. 29, No. 13 (Sept. 23, 1925), London, p. 382.

Hays, Will H. Aerial navigation—Its development and possibilities. U. S. Air Services, Vol. 10, No. 3 (Mar. 1925), Washington, pp. 19-22.

Heald, C. B. Some medical aspects of air transport.

Journ. Roy. Aer. Soc, Vol. 29, No. 174 (June 1925), London, pp. 246-268, :h

Health. Das Sanitätsflugwesen.

Aut. Mot. Flugw., 7. Jahrg., Nr. 3 (15. Febr. 1925), Berlin, pp. 77-78.

—— See Apollini, Giovanni: Apparecchi sanitari.

- See Royal Air Force: Report on the health of the Royal Air Force for the

year 1923.

Heath, A. B. Save all our helium.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, pp. 7-10, 48.

Hedin, Naboth. Northern Europe's air center—Sweden.

Aero Digest, Vol. 6, No. 5 (May 1925), New York, pp. 253-254, ill.

Heqener, Henri. De baanbrekers der dynamische luchtvaart VII George Cay ley.

Het Vliegveld, 9de Jaarg., No. 1 (Jan. 1925), Amsterdam, pp. 18-20, port.

- De baanbrekers der dynamische luchtvaart VIII John Stringfellow en

William Henson.

Het Vliegveld, 9de Jaarg., No. 2 (Feb. 1925), Amsterdam, pp. 50-53, ill.

Heinen, A. You are as safe in the air as at sea.

Collier's, Vol. 76 (Oct. 31, 1925), Springfield, 0., pp. 9-16, 111.

Heinkel. The Heinkel H. D. 17.

The Aeroplane, Vol. 28, No. 10 (Mar. 11, 1925), London, pp. 234, 236, ill.

- The Heinkel H. E. 18 sports monoplane. A new German low-power two-seater.

Flight, Vol. 17, No. 13 (Mar. 26, 1925), London, pp. 175-177, ill., diagr.

Heinkle. See McLaughlin, George F.: Heinkle instruction plane.

Helffrich. Klimatologie und Luftschiffahrt.

Zeitschr. Flugt. Mot., 16. Jahrg., 6. Helt (28. März 1925), München, pp. 135-138.

Helicopters. On helicopters and such things.

The Aeroplane, Vol. 29, No. 17 (Oct. 21, 1925), London, pp. 465-467, ill.

- See Autogiro: De Autogiro. Een geheel nieuw luchtvaartuig.

- See Autogiro: Meet the autogiro.

- See Baumhauer, A. G. v.: Some notes on helicopters.

- See Berliner: L'hélicoptère Berliner.

- See Brennan: Le prove dell'elicottero inglese Brennan.

- See Cierva: The Cierva "Autogiro." Noteworthy lecture at the Royal

Aeronautical Society.

- See Hellesen-Kahn: L'hélicoptère Hellesen-Kahn H.-K.-l.

- See Klemin, Alexander: An introduction to the helicopter.

- See Lock, C. N. H., and H. Bateman: Some experiments on air screws at

zero torque, with applications to a helicopter descending with the engine "off," and to the design of windmills.

- See Münk, Max Michael: Model tests on the economy and effectiveness

of helicopter propellers.

- See Surveying: Aerial surveying equipment—helicopters—production

airplanes of metal.

Helium. Bureau of Mines takes over helium.

Aviation, Vol. 18, No. 15 (Apr. 13, 1925), New York, p. 407.

--Helium air for submarine divers.

Scientific American, Vol. 133 (July 1925), New York, p. 52, ill.

- New source of helium.

Science, n. s., Vol. 62, sup. 10 (Oct. 2, 1925), Garrison, N. Y.

- New use for helium.

Literary Digest, Vol. 85 (June 27, 1925), New York, p. 24, ill.

- Our private stock of helium.

Outlook, Vol.139. (Feb. 25, 1925), New York, pp. 289-290.

- See Cabot, Godfrey L.: Helium.

- See Elworthy, R. T. : Helium and airships.

- See Frothingham, L. A.: Helium gas and dirigibles.

- See Heath, A. B. : Save all our helium.

- See Lind, S. C. : Helium for aeronautic use.

- See Litchfield, Paul W.: Helium and its value for airships.

- See McLennan, J. C: Helium gas and its uses.

- See Moore, R. H.: Helium. A research narrative.

- See Prentice, James: Influence of the helium-filled airship on future warfare and civilization.

- See United States Congress. Senate. Committee on Military Affairs:

Production of helium.

- See Verneuil, Max: L'hélium.

Hellesen-Kahn. L'hélicoptère Hellesen-Kahn H.-K.-l.

L'Aérotechnique (LAéronautique, 7me année, No. 77), 3me année, Num. 34 (oct. 1925), Paris, pp. 382-383, ill.

Hemming, H. Air surveying.

Flight, Vol. 17, No. 45 (Nov. 5, 1925), London, p. 735.

Henderson See Commercial aeronautics : Big business in the air. Henderson, Paul. The air mail—its future.

Aero Digest, Vol. 6, No. 3 (Mar. 1925), New York, pp. 27-29, 168.

- Pioneer work of TJ. S. air mail service.

Congressional Digest, Vol. 4, (April 1925), Washington, pp. 225-226.

- You'll soon be able to send air mail to Europe.

Collier's, Vol. 75 (June 27, 1925), Springfield, O., p. 23. Literary Digest, Vol. 86 (July 4, 1925), New York, p. 67.

Henriot, E., et E. Hugtjenard. Sur la realization de très grandes vitesses de rotation.

C. R. Acad. Sel., T. 180, No. 19 (11 mai 1925), Paris, pp. 1389-1392, ill.

Hensley, W. N. First line of defense.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, pp. 357-358, 398, ill.

Henson, William. See Hegener, Henri: De baanbrekers der dynamische luchtvaart VIII John Stringfellow en William Henson.

Heron, S. D. Air-cooled engine development.

Mechanical Engineering, Journal of the American Society of Mechanical Engineers, Vol. 47, No. 10 (Oct. 1925), New York, pp. 791-793, ill.

Herring shoals. See Wood, Henry, and George McGee: Aircraft experiments for the locating of herring shoals in Scottish waters, 1924.

Hidnert, Peter. Thermal expansion of aluminum and various important aluminum alloys.

Bureau of Standards, Scientific Paper No. 497. Bureau of Standards, Washington, pp. 34.

Higgins, George J. The comparison of well-known and new wing sections tested in the variable density wind tunnel.

National Advisory Committee for Aeronautics, Technical Notes No. 219, May 1925, Washington, p. 13, tabls., diagrs.

Highman, Charles. Wings as well as hands across the sea.

Aero Digest, Voi. 6, No. 5 (May 1925), New York, pp. 255,280.

Hill, R. M., and H. L. Stevens. Notes on stalled flying.

Aeronautical Research Committee, Reports and Memoranda, No. 963 (Ae. 179), October 1922, London, 1925, p. 9, 111.

Hillmann, W. Flying to-day and to-morrow.

Living Age, Vol. 327 (Dec. 19, 1925), Boston, pp. 630-632.

Hines, Frank T. The Veterans' Bureau and air pilots.

National Aeronautic Association Review, Vol. 3, No.-5 (May 1925), Washington, D. C, p. 76.

Hinkley, Vern. Hawaii hard at work creating landing fields. u. s. Air Services, Vol. 10, No. 7 (July 1925), Washington, p. 52.

- Hawaii the scene of great air activity.

u. s. Air Services, Vol. 10, No. 1 (Jan. 1925), Washington, pp. 21-26, ill.

Hinton, Walter, and A. W. Stevens. Amazon flyers survive jungle crash. Slipstream, Vol. 6, No. 1 (Jan. 1925), Dayton, Ohio, p. 9.

Hirschauer, L., et Charles Dollpus. L'année aéronautique 1924-1925. Paris, Dunod, éditeur, 1925, pp. sxx, 304, ill.

Hirschauer, L. Note sur le chronométrage des avions.

L'Aérotechnique (L'Aéronautique, 7me année, No. 74), 3me année, Num. 31 (Juii. 1928), Paris, p. 263, iii.

Hispaniola. See Boyden, Hayne D.: Aerial adventures in Hispaniol*.

History. History of air navigation, with official world air records, April 1,1925. Congressional Digest, Vol. 4 (April 1925), "Washington, pp. 219-221.

- See Aviation day: The anniversary of flight.

- See Compton: Airplane. Story of the birdman. The soaring motor car

of the air.

-■ See Compton: Balloon. Flying gas bags from Montgolfier to Zeppelin.

--See Eisenlohr, R.: Eine Lehrmittelsammlung für Luftfahrzeugbau an der

Techn. Hochschule zu Karlsruhe.

- See Guidoni, Alessandro: Ricordi di idro aviazione 1909-1921.

- See Hegener, Henri: De baanbrekers der dynamische luchtvaart VII

George Cayley.

- See Hegener, Henri: De baanbrekers der dynamische luchtvaart VIII

John Stringfellow en William Henson.

- See Hodgson, J. E.: The history of aeronautics in Great Britain from the

earliest times to the latter half of the nineteenth century.

- See Jones, Ernest: Our air force iu the Civil War.

Hoare, Samuel. A flying visit to the Middle East.

London, Cambridge University Press, 1925, p. 88, ill., map.

- Our air policy. Sir Samuel Hoare's speech in Commons.

Flight, Vol. 17, No. 10 (Mar. 5, 1925), London, pp. 130-132.

Hodgson, J. E. The history of aeronautics in Great Britain from the earliest times to the latter half of the nineteenth century.

London, Oxford University Press, 1925, pp. ndi, 436.

Hoff, Wilh. Die Deutsche VerkehrsaussteHung. Raum 1. Deutsche Versuchsanstalt für Luftfahrt.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Helt (9. Sept. 1925), München, pp. 327-329, ill.

--Luftfahrt.

Zaitschr. Ver. deutschr. Ing., Bd. 69, Nr. 3 (17. Jan. 1925), Berlin, pp. 75-76.

Hofmann, Rich. Deutscher Rundflug 1925.

Aut. Mot. Flug., 7. Jahrg., Nr. 10 (31. Mai 1925), Berlin, pp. 270-274, ill., map.

Hoqner, Einar. Contribution to the theory of ship waves. Academical dissertation.

Stockholm, Kungl. Boktryckeriet, p. A. Norstedt & Söner, 250989,1925, p. 128, ill. Holt. The Holt "Autochute."

Flight, Vol. 17, No. 48 (Nov. 26,1925), London, p. 782, ill.

Honduras. Aviation in Honduras.

Aviation, Vol. 19, No. 4 (July 27, 1925), Naw York, pp. 96-97.

- See Pickup, Christopher: Flying in Honduras.

Honolulu. See San Francisco: The San Francisco-Honolulu flight. The missing P. N. 9 flying boat found.

Hoop, Thomassen ä Thuessink van der. The Amsterdam-Batavia flight. Mijnheer van der Hoop tells of his experiences.

Flight, Vol. 17, No. 21 (May 21, 1925), London, pp. 310-311.

- Door de lucht naar Indie.

Amsterdam, Ultg. Scheltens & Oiltay.

- The flight to the Netherlands East Indies.

Journ. Eoy. Soc. Arts, Vol. 73, No. 3786 (June 12,1925), London, pp. 666-681.

Horn, X. L. The dedication of Ford Field, Mich.

Slipstream, Vol. 6, No. 2 (Feb. 1925), Dayton, Ohio, pp. 15-16, ill.

Horsfall, A. In the air over England.

Aero Digest, Vol. 6, No. 2 (Feb. 1925), New York, pp. 92, 104.

Horsfall, Jessie E. The "Los Angeles." Mrs. Calvin Coolidge presides over America's most impressive naturalization ceremony. Aero Digest, Vol. 6, No. 1 (Jan., 1925), New York, pp. 22-23, 48, ill.

Horton, D. Seven years after.

Nation, Vol. 121 (Oct. 7, 1925), New York, pp. 375-376.

Hose clip. A clip with a grip. The "Jubilee" worm-drive hose clip. Flight, Vol. 17, No. 4 (Jan. 22, 1925), London, p. 49, ill.

Howard, H. S. Battleships vs. airplanes.

Independent, Vol. 114 (Mar. 21,1925), New York, pp. 325-326.

Howe, A. B. See Partington, J. R., et A. B. Howe: Rapport des chaleurs spécifique de l'hydrogène.

Howland, R. C. J. Vortex motion behind a circular cylinder.

Journ. Roy. Aer. Soc, Vol. 29, No. 172 (April, 1925), London, pp. 189-195, diagr.

Hubert. See Speed: Le record du monde de vitesse rentre en France. L'adjudant Bonnet, sur Bernard (licence Hubert), vole à 448 kmh.

Huddleston, SiSLET. Floating isles to facilitate progress of oceanic aviation. ü. S. Air Services, Vol. 10, No. 5 (May, 1925), Washington, p. 36, ill.

Huff Daland. The Huff Daland LB1 bomber.

Aviation, Vol. 19, No. 18 (Nov. 2, 1925), New York, p. 632, ill.

- See Riis, Roger William: Commercial crop dusting. Details of the

operation of the Huff Daland dusters.

Huguenard, E., et A. Sainte-Lague. Le calcul des trajectoires des avions voiliers avec application au vol à voile dynamique.

Bulletin du Lahoratoire de morphologie expérimentale et d'aviation de l'École des Hautes Études. Paris, Roche d'Estrez, 1924.

Huguenard, E., A. Magnan et A. Planiol. Contribution à l'étude de la structure interne du vent.

Bulletin du Laboratoire de morphologie expérimentale et d'aviation de l'École des Hautes Études. Paris, Roche d'Estrez, 1924.

- Etude sur l'énergie interne du vent, son rôle dans le vol à voile et la

navigation aérienne.

Bulletin du Laboratoire de morphologie expérimentale et d'aviation de l'École des Hautes Études. Paris, Roche d'Estrez, 1924.

Huguenard, E. High velocity wind tunnels. (Their application to ballistics, aerodynamics, and aeronautics.)

National Advisory Committee for Aeronautics, Technical Memorandums No. 318, June 1925, Washington, p. 29, ill. From "La Technique Aéronautique," Nos. 37-38, Nov. 15, and Dec. 15,1924.

Huguenard, E., A. Magnan and A. Planiol. Sur la mesure des efforts aéro-dynamiques supportés par la voilure d'un avion.

C. R. Acad. Sei., T. 179, No. 22 (1 déc. 1924), Paris, pp. 1246-1248.

- Sur un appareil à fil chaud pour la détermination des grandes altitudes.

O. R. Acad. Sei., T. 180, No. 11 (16 mars 1925), Paris, pp. 828-830, ill.

- Sur un appareil mesurant les déformations des ailes en vue de l'étude de

la fatigue et du vieillissement des avions.

Service Technique de l'Aêron»utique, Bulletin Technique No. 24 (fév. 1925), p. 4.

Huguenard, E., A. Magnan and A. Planiol. Sur une méthode d'étude des efforts d'inertie résultant des manœuvres de pilotage des avions. O. K. Acad. Sei., T. 180, No. 25 (22 juin 1925), Paris, pp. 1899-1901, ill.

Huguenabd, E. «See Henriot, E., et E. Huguenard: Sur la réalisation de très grandes vitesses de rotation.

Hull, G. F. See Briggs, L. J., G. F. Hull, and H. L. Dryden: Aerodynamic characteristics of airfoils at high speeds.

Hulls. See Magaldi, Giulio: Hulls for large seaplanes.

- See Zahm, Albert Francis: Stability equations for airship hulls.

Human wings. Human wings foreseen by a scientific prophet.

Literary Digest, Vol. 86, No. 5 (Aug. 1, 1925), New York, pp. 48-60, ill.

Hungary. See Feiro: The Feiro "Dongo." A Hungarian school machine of unorthodox design.

Hunsakeb, J. C. How the modern seaplane was born.

Aviation, Vol. 18, No. 8 (Feb. 9, 1925), New York, p. 154.

Hydrodynamics. See Bjerknes, V.: Die hydrodynamischen Fernkräfte und deren Zusammenhang mit den Auftriebskräften von welchem die Aeroplane getragen werden.

- «See Hahn, È.: Notes sur l'application aux turbomachines des théories

modernes de l'hydronamique.

- «See Münk, Max Michael: The simplifying assumptions, reducing the

strict application of classical hydrodynamics to practical aeronautical computations.

- «See Reyneker, F. H.: De beginselen der hydro- en aerodynamica.

Hydroplanes. Le concours des hydravions de transport.

L'Aéronautique, 7me annfe. No. 77 (oct. 1925), Paris, pp. 387-389, ill.

- «See Fauber, William Harrison: Early developments of the hydroplane.

- «See Guidoni, Alessandro: Ricordi di idro aviazione 1909-1921.

- «See Simmonds, 0. E.: Recent progress in flying-boat design.

Hydrogen. «See Partington, J. R., et A. B. Howe: Rapport des chaleurs spécifiques de l'hydrogène.

- Het ontwerpen van watervliegtuigen.

Het Vliegveld, 9de Jaarg., No. 9 (Sept. 1925), Amsterdam, pp. 230-232, ill.

I

I. T. Coupe Aumont-Thieville.

L'Aérophile, 33e année, Nos. 19-20 (ler-15 sept. 1925), Paris, pp. 304-306, ill.

Ide, John Jay. The Ninth Paris aeronautic salon.

Aviation, Vol. 18, No. 3 (Jan. 19, 1925), New York, pp. 70-73, ill.

Idrac, P. Étude expérimentale et analytique du vol sans battemants des oiseaux voiliers des mers australes, de l'Albatros en particulier.

La Techn. Aéron., 16e année, n. s., No. 39 (15-jan. 1925), Paris, pp. 9-22, ill.

Ignition points. «See Tausz, J., and F. Schulte: Determination of ignition points of liquid fuels under pressure.

Ignition system. «See Kulebakin, V. S.: Ueber die Beseitigung der störenden Wirkung des elektrischen Zündssystems der Explosionsmotoren auf den Radioempfang bei Flugzeugen,

Ikarus. Von Flugzeugbau und Luftverkehr.

Aut. Mot. Flug., 7. Jahrg., Nr. 6 (31. März 1025), Berlin, p. 164.

Imbeecc, j. La préparation du Code International de l'air: le congrès de Lyon. L'Aérophile, 33e année, Nos. 19-20 (ler-15 oct. 1926), Paris, p. 309.

Immelman turn. See "Stewart": The Immelman turn.

India. See Cochran-Patrick, C. K. : Air surveys in Burma.

- See Hoop, Thomassen à Thuessink van der: Door de lucht naar Indie.

- See Scheepmaker, J. P.: Wat de Marine-Luchtvaartdienst in Indie alzoo

doet.

Indicators. See Instruments: A new gyroscopic turn indicator. >

- See Moss, H., and W. J. Stern: Phase setting of engine indicators.

Indo-Chine. Notice sur les conditions d'emploi de l'aéronautique militaire d'Indo-Chine dans des buts politiques et économiques. Aéronautique d'Indo-Chine, Hanoi.

- Le travail aérien de l'aviation militaire en Indo-Chine.

L'Aéronautique, 7me année, No. 71 (avril 1925), Paris, pp. 155-166, ill.

Inglis, H. B. Bombing.

u. S. Air Services, Vol. 10, No. 10 (Oct. 1925), Washington, pp. 31-35.

Insect flight. See Amans: Les observations du Dr. Amans sur la torsion des ailes chez les oiseaux et insectes.

Insignia. Designation of airplanes.

National Aeronautic Association Review, Vol. 3, No. 8 (Aug. 1925), Washington, D. C, pp. 119-120.

Slipstream, Vol. 6, No. 9 (Sept. 1925), Dayton, Ohio, pp. 22-23.

Institution of Aeronautical Engineers. The Institution of Aeronautical Engineers.

The Aeroplane, Vol. 28, No. 25 (June 24,1925), London, p. 636.

Instruments. Die Deutsche Verkehrsausstellung. Luftfahrtinstrumente der Askania-Werke, Berlin.

Zeitschr. Flugt. Mot., 16.Jahrg., 17.u.l8.He£t (9.8ept.l925), München, pp. 360-363, ill.

- Instruments nouveaux d'équipement de bord et de navigation. Notes

d'un visiteur du dernier Salon.

L'Aérotechnique, (L'Aéronautique, 7me année, No. 69), 3me année, Num. 26 (fév. 1926), Paris, pp. 65-66, ill.

- A new gyroscopic turn indicator.

Flight, Vol. 17, No. 5 (Jan. 29, 1925), London, p. 53, ill.

- See Ahlborn, Fr.: Orte für die Messgeräte an Flugzeugen. Aus der

früheren hydrodynamischen Versuchsabteilung der Kgl. preuss. Flug-zeugmeisterei Adlershof.

- See Badin: Variomètre enregistreur de M. Badin.

- See Boykow: Neuere Mittel zur Navigierung von Luftschiffen.

- See Cousin, Jacques: Le chronométrage des abions au voisinage du sol.

- See Eaton, H, N., and C. T. Buckingham: Nonmetallic diaphragms for

instruments.

- See Eula, A.: Anemometria.

—— See Jones, D. A., and H. L. Stevens: The Royal Aircraft Establishment control movement recorder, Mark III.

Instruments. See Polk, George W.: Instruments used by the world flyers.

- See Heid, H. J. E., and Otto E. Kirchner: An altitude chamber for the

study and calibration of aeronautical instruments.

- See Smith: Smith's gyro turn indicator.

- See Subito: The "Subito" cylinder gauge. > •

Insurance. Insurance survey.

Aviation, Vol. 18, No. 25 (June 22, 1925), New York, p. 694.

- Is aviation blocked by insurance timidity?

Literary Digest, Vol. 86, No. 10 (Sept. 5, 1925), New York, p. 52.

—— See Gallup, Christopher M.: Insurance and flight.

- See Patrick, Mason M.: Aviators as life insurance risks.

- See Parker, J. Brooks B.: The present status of aviation insurance.

- See Poorman, W. F.: Aviation hazards viewed by insurance companies.

- See Rodda, Douglas W.: Commercial aviation and insurance.

Interior Department. See Work, Hubert: The Interior Department in the air.

International Aeronautic Federation. The International Aeronautic Federation. An outline of its scope, organization and accomplishments. Aviation, Vol. 18, No. 6 (Feb. 9, 1925), New York, pp. 156-157.

International Aeronautics. See Schleicher, Rüdiger: Internationales luftfahrtrecht.

International Commission for Aerial Navigation. The International Commission for Aerial Navigation.

Flight, Vol. 17, No. 15 (Apr. 9,1925), London, p. 215.

International Commission for Air Navigation. See Commission Internationale de Navigation Aerienne.

International Congress for Aeronautics. See Brussels: Het International congres voor luchtvaart te Brüssel.

International Standard Atmosphere. See Altimeters: Regulations governing the graduation of altimeters consequent upon the adoption of an international standard atmosphere.

International trials. Report on aerofoil tests at National Physical Laboratory and Royal Aircraft Establishment.

Aeronautical Research Committee, Reports and Memoranda, No. 954 (Ae. 173.), May 1925, London, 1925, pp. 46, Ills., tabls.

Ireland. The Ireland Comet.

Aviation, Vol. 19, No. 15 (Oct. 12,1925), New York, p. 497, ill.

Irrawaddt. The Irrawaddy survey.

The Aeroplane, Vol. 29, No. 4 (July 22,1925), London, pp. 122,124. t

Irrawaddt Delta. See Kemp, R. C, C. G. Lewis, C. W. Scott, and C. R. Robbins: Aerophoto survey and mapping of the forests of the Irrawaddy Delta.

Irving, H. B., and A. S. Batson. Experiments on a model of a Bristol fighter aeroplane (l/10th scale). Section 1. Force and moment measurements at various angles of yaw.

Aeronautical Research Committee, Reports and Memoranda, No. 932 (Ae. 153.), October 1924, London, 1925, pp. 11, ills., diagrs., tabls.

Irving, H. B., and A. S. Batson. Forces and moments (including those due to controls) on a model Fairey "N4" flying boat "Atlanta," at various angles of yaw.

Aeronautical Research Committee, Reports and Memoranda. No. 933 (Ae. 154.), November 1924, London, 1925, pp. 14, tahls, diagrs.

—— On the effect of sideslip on the aerodynamic forces and moments (including those due to the controls) for a model S. E. 5A aeroplane.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 226-242, ills., diagrs, tabls. Reports and Memoranda No. 831. August 1922. (Ae. 82.)

- Summary of data on slotted wings obtained in the wind tunnel of Messrs.

Handley Page.

Aeronautical Research Committee, Reports and Memoranda, No. 930 (Ae. 152.), August 1924, London, 1925, pp. 25, ill.

Irwin, E. R. See Zimmerman, A. C, and E. R. Irwin: The clogging of fuel strainers.

Italy. Italy organizing air line to the Near East.

Aviation, Vol. 12, No. 3 (Jan. 12,1925), New York, p. 78.

- Visita de dos dirigibles italianos.

Iberica, Afio 12, Num. 583 (10 de Junio de 1925), Tortosa, pp. 385, 388-389, ill.

- See Australia: the Italian flight to Australia.

-— See Baciocchi : Italy forges ahead.

- See Molfese, Manlio: L'Aviazione da ricognizione italiana durante la

guerra europea.

- See N. 2: The Italian N.2 semirigid airship.

- See Nobile, Umberto: The trend of airship construction in Italy.

- See Piero Magni: The Piero Magni "Vittoria 1924" sesquiplane. A

novel Italian sport plane.

- See Records: Italy establishes 20 new world's records. Rolls-Royce

engines used.

Itjrieff, B. N. Airscrews (propellers).

Transactions of the Central Aero-Hydrodynamical Institute, No. 10. TJ. S. S. R. Scientific-Technical Department of the Supreme Council of National Economy, No. 71, Moscow, 1925, pp. 196, ills., diagrs., tabls.

J

J. B. Le moteur Farman 500 CV, 12 cylindres en W, détenteur des records du monde de durée et de distance.

L'Aérophile, 33e année, Nos. 15-16 (ler-15 août 1925), Paris, p. 237.

Jacobs, A. M. Flier's SOS.

St. Nicholas, Vol. 52 (Aug. 1925), New York, pp. 1034-1039, ill. Parachutes.

--Road maps of the sky.

St. Nicholas, Vol. 53, (Dec. 1925), New York, pp. 132-137, ill., diagr.

- Stepping out in midair.

St. Nicholas, Vol. 52 (July 1925), New York, pp. 898-905, ill.

Jaffetjx, Madeleine. Impressions de voyage.

L'Aérophile, 33e armée. Nos. 21-22 (ler-15 nov. 1925), Paris, pp. 343-344, ill.

Jahrbuch für Luftverkehr. See Poturzyn, Fischer von: Jahrbuch für Luftverkehr.

Jalbert, J. Les moteurs à deux temps pour avion.

L'Aérotechnique (L'Aéronautique, 7me année, No. 74-75), 3me année, Num. 31,32 (lull, août 1925), Paris, pp. 255-259, 296-299, ill.

Jancel, H. Considérations pratiques sur le graissage des moteurs d'avions commerciaux au moyen des huiles minérales.

L'Aéroteehnique (L'Aéronautique, 7me année, No. 79), 3me année. Num. 36 (déc. 1925), Paris, pp. 461-464, ill.

Jane, Fred T. All the world's aircraft. (Edited by C. G. Grey.)

London, Sampson, Low, Marston and Co., 1925. pp. 428.

Jansen, Cari,. Der Einfluss der Verdrehung der Flügelquerschnitte infolge der Steigung der Luftschraube auf die Festigkeitsrechnung.

Zeitschr. Fiugt. Mot., 36. Jahrg., 3. Heft (14. Feb. 1925), München, pp. 87-89, ill.

Japan. Japanese airmen reach London.

Flight, Vol. 17, No. 42 (Oct. 15, 1925), London, p. 677.

- See Borner, F.: Japan's air force is full grown.

--See Bouché, Henri: Tableau de l'aéronautique japonaise.

--See Young, Kennedy: Wings of the rising sun.

Jennings, W. G. See Garner, H. M., and W. G. Jennings: The variation of engine power with height.

Jewett. Jewett has new engine, axles and bodies.

Automotive Industries, Vol. 52, No. 1 (Jan. 25,1925), New York, pp. 20-21, ill.

Johansen, F. C. See Simmons, L. F. G., and F. C. Johansen: Experiments on the transmission of air waves through pipes.

Johnson, J. B. Welding of carbon and alloy steel tubing for aircraft. Slipstream, Vol. 6, No. 12 (Nov. 1925), Dayton, Ohio, pp. 9-12, ill.

Johnson, N. K. Short-period variations of the wind.

Nature, Vol. 115, No. 2886 (Feb. 21,1925), London, pp. 263-264.

Jones, Bennett Melvill, and J. C. Griffiths. Aerial surveying by rapid methods.

Camhridge, University Press, 1925, pp. xiv, 160, maps, ill. New York, Macmillan Co., 1925, pp. xvi, 159, ill.

Jones, C. S. Flying—a business—its future.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, pp. 599-600, ill.

Jones, D. A., and H. L. Stevens. The Royal Aircraft Establishment control movement recorder, Mark III.

Aeronautical Research Committee, Reports and Memoranda, No. 942 (Ae. 162.), October 1924, London, 1925, pp. 3, ill.

Jones, Ernest. Bill boards of the air.

National Aeronautic Association Review, Vol. 3. No. 8 (Aug. 1925), Washington, D. C, pp. 117-118.

- Chronology of world and American air records.

National Aeronautic Association Review, Vol. 3, No. 2, 3 (Feb.-March 1925), Washington, D. C, pp. 30-31, 4M7.

- Our air force in the Civil War.

National Aeronautic Association Review, Vol. 3, No. 7 (July 1925), Washington, D. C. pp. 100-103, 111.

Jones, E. Lester. Department of Commerce in Aeronautics. Coast and Geodetic Survey.

National Aeronautic Association Review, Vol. 3, No. 3 (March 1925), Washington, D. C. pp. 39-41.

Jones, E. T. Achievements of American aircraft-engine industry. _

Mechanical Engineering, Vol. 47, No. 10 (Oct. 1925), New York, pp. 790-791. '

- Superchargers for airplanes. Various steps in their development outlined

at meeting of Dayton section.

Journ. Soc. Automotive Engineers, Vol. 16, No. 4 (Apr. 1925), New York, p. 400.

Jones, E. T.- See Garner, H. M., and E. T. Jones: Full scale tests of different ailerons on Bristol fighter aeroplane.

Jones. L. J. See Cowley, W. L., A. G. Gadd, L. J. Jones, and Sylvia W. Skan: Biplane investigation with R. A. F. 15 section. Part III. Tests at various staggers and gap/chord ratios.

■■—— See Cowley, W. L., and L. J. Jones: An experimental test of the Prandl correction for tunnel wall interference.

--See Reif, E. F., and L. J. Jones: Measurements of lift, drag, and pitching

moment on the one-fifth scale model of the Bristol fighter with airscrew running.

Jones, Lloyd T. The reserve officer and the air service.

TT. S. Ak Services, Vol. 10, No. 1 (Jan. 1925), Washington, pp. 41-43.

Jones, R. On the aerodynamic characteristics of parachutes. A comprehensive account of researches incorporated in various papers submitted to the Advisory Committee for Aeronautics.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. I, London, 1925, pp. 49-117, ill., diagrs.

Joukowski. See Ackeret, J.: Neuere Untersuchungen der Aerodynamischen Versuchsanstalt, Göttingen.

- See Blumenthal, Otto: Pressure distribution on Joukowski wings.

--See Dupont e Girault: Quelques problèmes relatifs aux profils Joukowski.

- »See Trefftz, E. : Graphie construction of Joukowski wings.

Jotjkovsky, N. E. An analogy between the motion of heavy liquid in a narrow channel and the high velocity motion of gas in a pipe.

Transactions of the Central Aero-Hydrodynamical Institute, No. 1, V. S. S. E. Scientific-Technical Department of the Supreme Council of National Economy, No. 63, Moscow, 1925, pp. 35-57, diagrs.

- Flow of water in an open channel and üow of gases in pipes.

Transactions of the Central Aero-Hydrodynamical Institute, No. I, U. S. S. E. Scientific-Technical Department of the Supreme Council of National Economy, No. 63, Moscow, 1925, pp. 5-34, ill.

Journalism. »See Gates, H. L. : Planes and journalism.

Julliot, Ch.-L. Les aéronefs sanitaires et l'emblème de la Croix-Rouge.

L'Aêrophile, 33e année, Nos. 13-14 (ler-I5 lui], 1925), Paris, pp. 216-218.

Junkers K. 16. A Bristol-engined German monoplane.

The Aeroplane, Vol. 29, No. 20 (Nov. 11, 1925), London, p. 568, ill.

Junkers. Deutschland wieder zum Grossflugverkehr zugelassen. Junkers-Grossverkehrs-Flugzeug Type G 23.

Aut. Mot. Flugw., 7. Jahrg., Nr. 5 (15. März 1925), Berlin, pp. 133-134, ill.

- Die Junkers-Flugzeuge im deutschen Rundflug 1925.

Aut. Mot. Flugw., 7. Jahrgw., Nr. 12 (30. Juni 1925), Berlin, pp. 328-332, ill.

--The Junkers G. 24 L. Latest German three-engined passenger aeroplane.

Flight, Vol. 17, No. 36 (Sept. 3, 1925), London, pp. 561-564, ill.

--Das Junkers-Grossflugzeug G 23: Eine interessante italienische Beurteilung.

Sonderabdruck ans: Deutsche Motor-Zeitschrift, Jahrg. 1925, Heft 12. Verlag: Hellmut Droscha, Dresden.

--Luftverkehr mit Junkers-Flugzeugen. Flugplan June 1925.

Junkere-Luftverkehr Nachtrichtenblatt, Vol. 3, No. 10 (June 30, 1925), Dessau.

Junkers. Das neue Junkers-Flugzeug Type "K16."

Ant. Mot. Flugw., 7. Jahrg., Nr. 19 (15. Okt. 1925), Berlin, p. 632.

--See Clark, B. D., L. P. Coombes, H. Glauert, and A. S. Hartshorn:

Lift and drag of Junker monoplane. Comparison of model with full scale results.

- See Matthias, Joachim: Nachtflug mit der Junkers "G 23."

--'■ See Off ermann, E.: Das Junkers Gross-Verkehrs-Flugzeug.

Junkers, Hugo. See Poeschel, Johannes: Einführung in die Luftfahrt . . . Jupiter. One-hundred-hour Jupiter test at 425 rated horsepower.

Aviation, Vol. 18, No. 8 (Feb. 23, 1925), New York, p. 219.

E

Kaemppeet, Wolfgang. See Dubois, Paul, und Wolfgang Kaempfert: Flugbahnen und Stromfeld im Luv.

Karlsruhe. See Eisenlohr, R.: Eine Lehrmittelsammlung für Luftfahrzeugbau an der Techn. Hochschule zu Karlsruhe.

K£rmXn, Th. v. Ludwig PrandtL

Zeitschr. Flugt. Mot., 16. Jahrg., 3. Heft (14. Feb. 1925), München, pp. 37-39, port.

- Ueber die Stabilität der Laminarströmung und die Theorie du Turbulena.

Proceedings of the First International Congress, for Applied Mechanics Delft, 1924; Delft, 1925, pp. 97-112.

- See Bienen, Th., und Th. v. Kärmän: Zur theorie der Luftschrauben.

Katz, Herman. Air situation in Germany.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, pp. 31, 38.

Katzmayr. See Alayrac, J.: L'effet Katzmayr et son utilisation pour le vol sans moteur.

- See Cowley, W. L.: A note on the Katzmayr effect; that is, the effect

on the characteristics of an aerofoil produced by an oscillating air stream.

- See Ober, Shatswell: Note on the Katzmayr effect on airfoil drag.

- See Toussaint: Etudes et experiences sur l'effet Katzmayr.

Kayser, E. Forschungsarbeit der Aerodynamischen Institute.

Praktischer Maschinen-Konstrukteur, Bd. 58, No. 5 (Feb. 3, 1925), Berlin, pp. 70-73, 111.

Keary, E. M. See Baker, G. S., and E. M. Keary: Experiments with model flying-boat hulls, twenty-fourth series report. Comparison of longitudinal with transverse steps.

Keller, L., und A. Friedmann. Differentialgleichungen für die turbulente Bewegung einer Kompressibelen Flüssigkeit.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 395-104.

Kemp, R. C, C. G. Lewis, C. W. Scott, and C. R. Robbins. Aerophoto survey and mapping of the forests of the Irrawaddy Delta. '

Burma Forest Bulletin No. 11, Mayma. Supt. Government Printing, Burma, 1925, pp. 44, maps, ill,

Kempp, G. Ueber den Reibungswiderstand von Flächen verschiedener Form.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 439-448.

Kennedy, H. A. S. Flight to Hawaii.

Outlook, Vol. 141 (Sept. 16,1925), New York, pp. 77-78, 111.

Kennedy, Thomas Hart. An introduction to the economics of air transportation.

tj. S. Air Services, Vol. 10, No. 2 (Feb. 1925), Washington, p. 44. Kergtjistel, Jean. Note sur la comparaison des cellules des avions.

L'Aérotechnique (L'Aéronautique, 7me année, No. 77), 3me année, Num. 34 (Oct. 1925), Paris, pp. 383-384.

Kermode, A. C, and R. G. Harris. Full scale and model measurements of pressure distribution round one rib of a B. E. 2C aeroplane with R. A. F. 15 section.

Aeronautics. Techn. Hep. Aer. Res. Com., 1923-24, Vol.2, London, 1925, pp. 463-176, ill., diagrs. tabls.

Reports and Memoranda, No. 895. November 1923.

Kermode, A. C, B. D. Clark, and R. G. Harris. Full scale and model measurements of pressure of distribution round two ribs of a B. E. 2E aeroplane with R. A. F. 19 section.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 451-462, diagrs., tabla.

Reports and Memoranda, 894. December 1923. (Ae. 124.)

Kernéis, Jean. Considérations sur l'emploi des suspensions par fils en aérodynamique expérimentale.

L'Aérophile, 33e année, Nos. 17-18 (ler-15 Sept. 1925), Péris, pp. 267-272, ill.

- Wire suspensions in wind-tunnel experiments.

National Advisory Committee for Aeronautics, Technical Memorandums No. 342, Dec, 1925, Washington, pp. 14, ill. From "L'Aérophile," Sept. 1-15, 1925.

Kerr, R. M. Airplane patrol has limited use in forest fire protection in northeastern Minnesota.

American City, Volv 33 (Dec. 1925), New York, pp. 658-659, ill.

Kerston, J. H. W. To shape the auto like a fish.

Literary Digest, Vol. 85, No. 2 (April 11, 1925), New York, pp. 24-25, ill.

Ketjvelink, D. J. See Varekamp, D. C, en D. J. Keuvelink: Een nieuw sportvliegtuig.

Keys, C. M. New planes for Pulitzer trophy race indicate America's strength in the air.

Aviation, Vol. 19, No. 14 (Oct. 5, 1925), New York, pp. 433-436, ill.

- Value of racing planes.

Aero Digest, Vol. 7, No. 4 (Oct. 1925), New York, pp. 535-536, 568.

Keyways. See Gough, H. J.: The effect of key ways upon the strength and stiffness of shafts subjected to torsional stresses.

King, P. C. W. The evolution of the airship.

The Photographic Journal, Vol. 65, n. s. Vol. 49, No. 6 (June, 1925), London, pp. 320323, ill.

King, W. V., and G. H. Bradley. Airplane dusting controls malaria mosquitoes.

Aero Digest, Vol. 7, No. 6 (Dec, 1925), New York, pp. 652-653, 688, ill.

King's Cup. The fourth King's Cup circuit of Britain handicap. Flight, Vol. 17, No. 28 (July 9, 1925), London, pp. 431-440, ill.

- The King's Cup.

Flight, Vol. 17, No. 14 (Apr. 2, 1925), London, p. 199.

- The King's Cup race.

The Aeroplane, Vol. 28, No. 24 (June 17, 1925), London, p. 596.

- The King's Cup race, 1925.

Flight, Vol. 17, No. 27 (July 2, 1925), London, pp. 416-422, ill., map.

King's Cup. On the King's Cup race.

The Aeroplane, Vol. 29, No. 2 (July 8, 1925), London, pp. 42-62, ill., map.

Kingston. All-metal flying-boat hulls.

Flight, Vol. 17, No. 51 (Dec. 17,1925), London, pp. 823-825, ill.

- The "Kingston" metal-hull flying boat. An interesting development by

the English Electric Company.

Flight, Vol. 17, No. 49 (Dec. 3, 1925), London, pp. 791-793, ill.

Kinshasa. See Brussels: The Brussels-Kinshasa flight.

Kirchner, Otto E. See Reid, H. J. E., and Otto E. Kirchner: An altitude chamber for the study and calibration of aeronautical instruments.

Kirste, Léon. Calculation of wing spars of variable cross-section and linear load.

National Advisory Committee for Aeronautics, Technical Memorandums No. 305, March 1925, Washington, pp. 5, ill. From l'Aéronautique, Jan. 1925.

- Les essais statiques française.

l'Aérotechnique (l'Aéronautique, 7me année, No. 76), 3me année. Num. 33 (sept. 1925), Paris, p. 341, ill.

- Etude d'un avion transatlantique.

L'Aérotechnique (L'Aéronautique, 7me année, No. 73), 3me année, Num. 30 (juin 1925) Paris, pp. 223-225, diagrs.

- Note sur le calcul des longerons à section et à charge linéaire variables.

L'Aérotechnique (L'Aéronautique, 7me année, No. 68), 3me année, Num. 25 (Jan. 1925), Paris, pp. 25-26, ill.

Kirsten-Boeing. See Berst, C. A.: The Kirsten-Boeing aerial propeller.

Kitty Hawk. See Wright, Orville: With Orville Wright in his workshop. Modest man who first took the air tells about the early flights at Kitty Hawk.

Klein, Julius. Department of Commerce in Aeronautics. Bureau of Foreign and Domestic Commerce.

National Aeronautic Association Review, Vol. 3, No. 3 (March 1925), Washington, D. C, p. 41.

Kleinschmidt, F. E. The lure of the North Pole.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, pp. 350-353, 394, ill.

Klemin, Alexander. Air races of 1925; interest in aeronautics is shifting from speed to utility.

Scientific American, Vol. 133 (Dec. 1925), New York, pp. 365-368, ill.

- Can huge dirigibles supplant our ocean liners?

Scientific American, Vol. 132 (Jan. 1925), New York, pp. 18-21, ill., diagr. Literary Digast, Vol. 84 (Jan. 10, 1925), New York, pp. 52-56, ill.

- Can we prevent aerial holocausts?

Scientific American, Vol. 132 (Feh. 1925), New York, pp. 94-96, ill., map.

- Future Leviathans of the skies.

Scientific American, Vol. 132 (Mar. 1925), New York, pp. 166-168, ill.

- An introduction to the helicopter.

National Advisory Committee for Aeronautics, Technical Memorandums No. 340, 1925, Washington, pp. 57, ill. From "Mechanical Engineering," Mid-November 1924. Aviation, Vol. 18, No. 14 (Apr. 6, 1925), New York, pp. 374-376, ill.

- Is the Magnus effect applicable to aircraft?

Aviation, Vol. 18, No. 5 (Feb. 2, 1925), New York, pp. 127-129, diagr.

53466—28-7

Knight, L. R. Boston airport points way to all cities.

U. S. Air Services, Vol. 10, No. 3 (Mar. 1925), Washington, pp. 17-18, ill.

Kobatashi, A. Effect of altitudes on the power of aero engines.

Journal of the Society of Mechanical Engineers, Vol. 28, No. 101 (Sept. 1295), T6ky8, pp. 551-601, ill.

Kölzee. Die Windverhältnisse im SegeMuggelände in den Stöllner Bergen bei Rhinow.

Zeitschr. Flugt. Mot., 16. Jahrg., 1. Heft (14. Jan. 1925), München, pp. 8-11, ill.

Kohr, Robert F. Condensation of water from engine exhaust for airship ballasting.

Bureau of Standards, Technologic Paper No. 293, Bureau of Standards, Washington, pp. 26, ill.

Kollmann, Franz. Das Zeppelinluftschiff.

Berlin, Verlag von M. Erayn, 1925, pp. 90, ill.

Koning, C. Einige Bemerkungen über nichtstationäre Strömungen an Tragflügeln.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 414-417.

Koolhoven. Het Koolhoven F. K. 33 verkeersvliegtnig.

Het Vliegveld, 9de Jaarg., No. 10 (Oct. 1925), Amsterdam, pp. 255-256, ill.

- Het Koolhoven schoolvliegtuig F. K. 32.

Het Vliegveld, 9de Jaarg., No. 7 (Juli 1925), Amsterdam, pp. 181-183, ill..

Kop, F. H. van der. De mogelijkheden van het Finsche luchtverkeer. Het Vliegveld, 9de Jaarg., No. 12 (Dec. 1925), Amsterdam, pp. 321-322.

Korvin-Kroukovsky, B. V. Some technical aspects in commercial design at the air meet.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, pp. 591, 593.

- Stability and controllability of airplanes.

Aviation, Vol. 18, Nos. 10-21 (Mar. 9-May 25, 1925), New York, pp. 266-269, 296-297, 320-322, 347-343,380-381,411-412, 436-438,462-463, 488^90, 521-522, 545-546, 574-575, diagr.

Koschel, E. Die Deutsche Verkehransstellung. Raum 6a. Medizinische Forschung.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9. Sept. 1925), München, pp. 350-354, ill.

Koschmieder, Harald. Die Arbeiten des Messtrupps während des Rhönsegelflug-Wettbewerbs, 1924.

Zeitschr. Flugt. Mot., 16. Jahrg., 12. Heft (28. Juni 1925), München, p. 235.

- Zur Kenntnis des Stromfeldes in Lee. (Ergebnisse des Messtrupps des

Rhönsegelflug-Wettbewerbes, 1924).

Zeitschr. Flugt. Mot., 16. Jahrg., 12. Heft (28. Juni 1925), München, pp. 240-244, diagrs.

Kotschin, N. Ueber starke Diskontinuitäten in einer kompressiblen Flüssigkeit.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 405-410.

Kraft, H. T. Description of the Goodyear Pilgrim.

Aviation, Vol. 19, No. 9 (Aug. 31, 1925), New York, pp. 242-243, diagr.

Kromer, Hugo. See Poeschel, Johannes: Einführung in die Luftfahrt.

Krupp, G. Deutsche Verkehrsausstellung München: Halle 7a. Sonderabteilung der Wissenschaftlichen Gesellschaft für Luftfahrt, e. V. (WGL): "Luftfahrt-Wissenschaft und Praxis."

Zeitschr. Flugt. Mot., 16. Jahrg., 8. Heft (28. April 1925), München, p. 176.

- "Luftfahrt,Wissenschaft und Praxis."

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9. Sept. 1925), München, pp. 326-327, ill.

Krupp, G. Was brachte die Deutsche Automobil-Ausstellung für die Luftfahrt Neues?

Zeitschr. Flugt. Mot., 16. Jahrg., 2. Heft (28. Jan. 1925), München, pp. 23-24, 111.

Ktjbec, Henry. Birdmen's birds.

A.aro Digest, Vol. 7, No. 2 (Aug. 1925), Naw York, pp. 419-420, ill.

Ktjehn, R. Atomization of liquid fuels. Part I. Relation between atomization and combustion. Methods employed for determining the size of particles and small drops. Choice of experimental methods.

National Advisory Committee lor Aeronautics, Technical Memorandums No. 329, Sept. 1925, Washington, pp. 31. From " Der Motorwagen," July 10 and 20,1924.

- Atomization of liquid fuels. Part II. Description of apparatus. Fuels

tested. Atomization experiments. Discharge measurements atomization.

National Advisory Committee for Aeronautics, Technical Memorandums No. 330, Sept. 1925, Washington, p. 50, ill. From "Dar Motorwagen," Oct. 10 and 20, and Nov. 30, 1924.

- Atomization of liquid fuels. Part III. Critical discussion of experimental results mixing the atomized fuel with air.

National Advisory Committee for Aeronautics, Technical Memorandums No. 331, Sept. 1925, Washington, pp. 48, diagrs. From "Dar Motorwagen," Dec. 10,1921, Jan. 20, and Feb. 10, 1925.

Ktjipers, C. Bijzonderheden over de ontwikkeling der vliegtuigmotoren van 1903-1923.

Het Vliegvald, 9da Jaarg., Nos. 1-6 (Jan.-Junl 1925), Amsterdam, pp. 4-6, 34-36, 101-103, 125-127, ill., diagrs.

- Bristol motoren.

Hat Vliegveld, 9de Jaarg., No. 10 (Oct. 1925), Amsterdam, pp. 256-260, ill.

Kulebakin, V. S. Ueber die Beseitigung der störenden Wirkung des elektrischen Zündsystems der Explosionsmotoren auf den Radioempfang bei Flugzeugen.

Elektrotechnische Zeitschrift, Bd. 46, Nr. 29 (16. Juli 1925), Berlin, pp. 1081-1067, ill.

Kumbrtjch, H. Pitot-static tubes for determining the velocity of air.

National Advisory Committee {or Aaronautics, Technical Memorandums No. 303, Feh. 1925, Washington, pp. 51, ill. From "Forschungsarbeiten auf dam Gebiete des Ingenieurwesens," 1921, No. 240.

Ktjtta-Jotjkowski. See Rizzo, Frank: The Flettner rotor ship in the light of the Kutta-Joukowski theory and of experimental results.

L

LZ 126. See Seilkopf, Heinrich: Die Wetterberatung der Amerikafahrt des LZ 126.

Laboratories. See Engines: The aeronautical engine laboratory, Naval Aircraft Factory, Philadelphia.

Labrély. L'obturateur d'objectif Labrély.

L'Aérotecbnique, (L'Aéronautique, 7me année, No. 77), 3me année, Num. 34 (oct. 1926), Paris, pp. 381-382, ill.

Labtjssiere. La photochimie en photographie.

La Techn. Aéron., 16e année, n. s., No. 45 (15 Juil. 1925), Paris, pp. 194-197, ill.

Lachmann, G. Leichtflugzeugbau.

Munich, und Berlin, E. Oldenbourg, 1925, pp. v, 141, ill.

Lachmann, G. Results of recent experiments with slotted wings.

National Advisory Committee for Aeronautics, Technical Memorandums No. 298, Jan. 1926, Washington, pp. 15, ill. From "Zeitschrift für Flugtechnik und Motorluftschiftahrt," Aug. 26, and Sept. 26, 1924.

- Der Spaltflügel in der Praxis.

Zeitschr. Flugt. Mot., 16. Jahrg., 1. Heft (14. Jan. 1925), München, pp. 6-8, 111.

Lapât, A. Sur le sillage des cylindres tournants.

C. R. Acad. Sel., T. ISO, No. 10 (9 mars 1925), Paris, pp. 729-731.

- Sur les déviations de la poussée du vent, sur un cylindre, produites par

une lame d'air jaillissant tangentiellement à la surface de ce corps.

C. R. Acad. Soi., T. 180, No. 25 (22 juin 1925), Paris, pp. 1901-1903.

-— Sur un moyen de modifier le sillage.

C. R. Acad. Soi., T. 180, No. 16 (20 avril 1925), Paris, pp. 1197-1198.

Lahm, F.-S. See R. S. : Des nouvelles de F.-S. Lahm.

Laine, André. Ce que tout aviateur doit savoir. Preface by Paul Painlevé. Paris, Gauthier-Villars et Cie., 1925, pp. liv, 173.

Lamé, M. Les carburateurs du Salon. Les progrès de la carburation et les nouveaux carburateurs.

L'Aéronautique, 7me année No. 69 (fév. 1925), Paris, pp. 74-77, ill.

Lampert Committee. The investigation of the Lampert Committee. Aviation, Vol. 18, No. 2 (Jan. 12, 1925), New York, pp. 50-61.

- The Lampert Committee report.

Aviation, Vol. 19, No. 26 (Dec. 28, 1925), New York, pp. 906-909, ill.

Lanchester. See Bjerknes, V.: Sur les forces qui portent les aéroplanes et leur relation avec les actions hydrodynamiques à distance.

- See Martin, H. M.: The elements of the Lanchester-Prandtl theory of

aeroplane lift and drag.

Landing. How the War Department retards flying.

Aviation, Vol. 18, No. 19 (May 11, 1925), New York, p. 523.

- Pontili avvolgibili.

Rend. Tech. Dir. Sup. Genio Costr. Aer., Anno 13, N. 6 (15 Giugno 1925), Roma, pp. 7-18, 111.

- See Bramson, M. L. : On engine failures and forced landings.

- See Nobile: The "Nobile" mechanical landing system.

Lanuing fields. See Airports.

- See Bingham, Hiram: The most precious thing in the world.

- See Black, Archibald: Have you a landing field in your town?

■- See Boles, Thomas: Volcano destroys landing field.

■- See Davis, Charles: Airports for national highways.

- See Kinkley, Vern.: Hawaii hard at work creating landing fields.

- See Rickenbacker, Edward V.: How good landing fields are made.

- See Scott, Wisner Gillette: Highway air landings. Requirements of a

standardized field.

- See Thomas, Marius: Aménagement et entretien des terrains d'aviation.

- See Wehrle, Howard F.: Privately owned and operated air terminals.

Landing gear. See Gadant, R.: Les systèmes amortisseurs dans les trains d'atterrbsage.

Landing light. Field landing light tested at Washington for water flying. U. S. Air Services, Vol. 10, No. 9 (Sept. 1925), Washington, pp. 30-32, ill.

Landing ships. See Gagnotto, Luigi: La nave portavelivoli.

- See Saratoga: Ours in the largest airplane carrier.

Landis, Reed G. Legion demands action.

Aero Digest, Vo. 6, No. 2 (Feb. 1925), New York, pp. 71-72, ill.

Langlet. The Langlcy aerodrome in flight at Hammondsport, N. Y., in 1914. Aero Digest, Vol. 7, No. 1 (July 1925), New York, p. 390, ill.

Langlet, Samuel Pierpont. Langley plane.

Outlook, Vol. 140 (May 13, 1925), New York, pp. 50-51.

- National Aeronautic Association would relabel Langley machine.

U. S. Air Services, Vol. 10, No. 6 (June 1925), Washington, p. 34.

- See Wright-Langley: The Wright-Langley machine.

- See Wright-Langley controversy: The Wright-Langley controversy.

Langley Field. Oil engine research at Langley Field.

Oil Engine Power, Vol. 3, No. 3 (Mar. 1925), New York, pp. 166-171, ill.

Langlet-Wright controversy. Who made the first flying machine? The Aeroplane, Vol. 28, No. 22 (June 3, 1925), London, pp. 536, 538.

Langsdorff, Werner von. Bardin-Leichteindecker. Luftfahrt, Bd. 28, Nr. 2 (16 Fobr. 1924), Berlin, p '■■

- Boishardy-Leichteindecker.

Luftfahrt, Bd. 28, Nr. 2 (15. Febr. 1924), Berlin, p. LÜ

- Das Leightflugzeug.

Frankfurt-am-Main, Bechbolds, 1925, pp. 178, ill.

- Pegna-Bonmartini-Leichteindecker.

Luftfahrt, Bd. 28, Nr. 2 (16. Febr. 1924), Berlin, p. 26.

- Poncelet-Leichteindecker.

Luftfahrt, Bd. 28, Nr. 2 (15. Febr. 1924), Berlin, p. 26.

- Schwanzloses Simplex-Leichtflugzeug.

Luftfahrt, Bd. 28, Nr. 2 (15. Febr. 1924), Berlin, p. 25.

- Taschenbuch der Luftflotten. IV. Jahrgang 1924-25

München, J. F. Lehmanns Verlag, pp. 540, ill.

Lansdowne, B. R. How Mac flew.

St. Nicholas, Vol. 53 (Nov. 1925), New York, pp. 88-89, ill.

Lansdowne, Z. With the Shenandoah.

Seturday Evening Post, Vol. 198 (Oct. 24, 1925), Philadelphia, p. 7. III.

Lantern slides. See United States Air Service, War Department: Catalogue of motion-picture films and lantern slides.

Laporte, Fernand. Fernand Laporte.

L'Aéronautique, 7me année, No. 77 (oct. 1925), Paris, pp. 395-3B6, port.

Lapresle. Effets de la présence d'un fuselage en avant ou en arrière d'une hélice.

Bulletin Technique N. 22 du Service Technique de l'Aéronautique.

Lasky, Jesse L. The air mail in motion pictures.

Aero Digest, Vol. 6, No. 3 (Mar. 1925), Now York, p. 148.

Latécoère. Constatations physiologiques sur le pilotage des avions commerciaux.

L'Aéronautique, 7me année, No. 75 (août 1925), Paris, pp. 311-313.

- La liaison aérienne entre Rio de Janeiro et Buenos-Ayres est accomplie.

Une grande étape dans la réalisation du programme Latécoère.

L'Aéronautique marchande, (L'Aéronautique, 7me année, No. 69). 4me année, Num. 38 (fév. 1925), Paris, p. 69, diagr.

Latécoèrb. Le programme des lignes Latécoère.

L'Aéronautique marchande, (L'Aéronautique, 7me année, No. 71), 4me année, Num. 40 (avril 1925), Paris, pp. 153-154, ill.

- See Paris: Air liners at the Paris aeronautic salon. Three Latecoere

planes compared and Dewoitine D14 described.

- See Van Zandt, J. Parker: Latécoère air lines.

Lateral control. See Douglas, G. P., F. B. Bradfield and A. S. Hartshorn: The lateral control of a biplane by combined use of ailerons and varying leading edge slots.

- See Stevens, H. L. : Full scale tests of a new slot-and-aileron lateral control.

Lateral stability. See Reif, E. F.: The lateral stability of S. E. 5a in gliding flight.

Latham. L'hydravion quadrimoteur Latham 1600 HP.

L'Aêrotechnique, (L'Aéronautique, 7me année, No. 76), 3me année. Num. 33 (sept. 1926) Paris, p. 332, ill.

Latvia. See Beardmore : A new British aeroplane for Latvia.

Lavender, T. The "Duplex" wind tunnel of the National Physical Laboratory.

Aeronautics. Techn. Hep. Aer. Hcs. Com., 1923-24, Vol. 2, London, 1925, pp. 635-537, ill., tabl. Reports and Memoranda, No. 879. September 1923. (Ae. 111.)

Lawrence, Charles L. The aircraft industry's needs.

Aviation, Vol. 19, No. 18 (Nov. 2, 1925), New York, pp. 629-631.

Laws and regulation. The effect of strict aircraft regulation.

Aviation, Vol. 19, No. 24 (Dec. 14, 1925), New York, pp. 848-849.

- Police urge regulation of aircraft.

Aviation, Vol. 19, No. 9 (Aug. 31, 1925), New York, p. 246.

- Uncle Sam as air boss.

Nation, Vol. 119, (Nov. 26, 1924), New York, p. 559.

--See Conférence Internationale de Droit: La Conférence Internationale

de Droit privé aérien.

- See Congrès international de Législation Aérienne: Sizième Congrès

international de Législation Aérienne. Rome, 21-26 avril 1924.

--See Imbrecq, J.: La préparation du Code International de l'air: le congrès de Lyon.

--See Rankin, Enid Scott: The dominion of sea and air.

- See Sparkes, R. B.: The law relating to the air.

Lay, J. T. See Bazzoni, C. B., and J. T. Lay: Successive stimulation of the arc lines of helium below the ionization potential.

Lea, F. C. Aluminum alloys for aeroplane engines.

Journ. Roy. Aer. Soc, Vol. 19, No. 176 (Aug. 1925), London, pp. 338-398, ill.

Leblanc, Alfred. See Aimé, Emmanuel: Le prix Alfred Leblanc.

Lecœuvre, R. Les matières premières de la construction aéronautique au Salon.

L'Aéronautique, 7me année, No. 69 (fév. 1925), Paris, pp. 44-49, ill.

- La résistance des voilures d'avions. Un nouvel appareil de vérification

rapide.

L'Aêrotechnique, (L'Aéronautique, 7me année. No. 72), 3me ennée. Num. 29 (mai 1926), Paris, pp. 180-182, ill.

Lee, A. See Capon, R. S., and A. Lee: Preliminary report on the forced oscillations of aircraft compasses.

Lbhl, Max. Dinormen an Luftfahrzeugen.

Zeltschr. Flugt. Mot., 16 Jahrg., 5.Hoft (H.März 1925), München, pp. 122-124.

- Für den Luftfahrzeugbau wichtige Dinorm-Entwüurfe.

Zeitschr. Flugt. Mot., 16. Jahrg., 11. Heft (13. Juni 1925), München, pp. 226-227.

Lehe, G. L'emploi des régimes rapides dans les moteurs d'aviation.

La Techn. Aéron., 16a année, n. s., No. 43 (15 mai 1925), Paris, pp. 141-149. Servies Techniqua da l'Aéronautique, (juin 1925).

Leitnee-Watts. The Leitner-Watts metal propeller.

Aviation, Vol. 19, No. 9 (Aug. 31, 1925), New York, pp. 244-245, ill.

Lemaitbe, Henri. See Blanchet, Georges: Aviateurs contemporains. Ludovic Arrachart et Henri Lemaitre.

Lemoine, Jean. La destruction du "Shenandoah."

L'Aérophile, 33a annéa, Nos. 17-18 (ler-15 sept. 1925), Paris, pp. 265-266.

Lemon, H. B. Disappearance of helium in Geissler tubes.

Science n. s., Vol. 61 (May 15, 1925), Garrison, N. Y., p. 316.

Lempertz, Eberhard. See Poeschel, Johannes: Einführung in die Luftfahrt.

Leo 13 bis. See France: Neues aus Frankreich.

LePage, W. Laurence. Aviation of vast economic value.

Aero Digest, Vol. 6, No. 2 (Fan. 1925), Now York, pp. 79-81,100, ill.

- Further experiments on tandem aerofoils.

Aeronautics. Techn. Eep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 134-147, ills., diagrs., tabla.

- Note on the longitudinal stability of aeroplanes with special reference to

tail plane design.

Journ. Roy. Aer. Soc, Vol. 29, No. 179 (Nov. 1925), London, pp. 586-589.

- The start of the Ford reliability tour.

Aviation, Vol. 19, No. 14 (Oct. 5,1925), New York, pp. 423-425, ill.

Leparmentier. Le freinage des avions par l'hélice à pas variable.

L'Aérophile, 33e annéa, Nos. 13-14 (ler-15 juU. 1925), Paris, pp. 209-211, ill.

Lepère, G. A propos de la formule d'essais statiques du S. T. Aé.

L'Aérotechniqua (L'Aéronautique, 7mo année, No. 76), 3me année, Num. 33 (sept. 1925), Paris, p. 340, ill.

LePetit, R. See Barbaud, A., et R. LePetit: Mesure du vent en avion et correction de ses effets sur la route suivie.

Le Prieur. Avec la mission De Goys, de Paris à Gao.

C. R. Acad. Sei., T. 180, No. 16 (20 avril 1925), Paris, pp. 1193-1194.

Le Prieur, Ives. The "Navigraph."

National Advisory Committea for Aaronautics, Technical Mamorandums No. 320, June, 1925, Washington, pp. 10, ill. From "L'Illustration," April 4, 1925.

Le Prieur, Y. La consécration d'une méthode de navigation. De Paris à Gao avec la mission de Goys.

L'Aéronautique, 7me annéa, No. 72 (mai 1925), Paris, pp. 165-167, ill.

- Dérivomètres et dérivographes.

L'Aérotechniqua, (L'Aéronautique, 7 ma année, No. 75), 3 ma annéa, Num. 32 (août 1925), Paris, pp. 300-301, ill.

Leroux. L'organisation technique officielle de l'Aéronautique aux Etates-Unis en Angleterre et en France.

La Techn. Aaron., 16a année, n. s., Nos. 40,41 (15 fév. 15 mars 1925), Paris, pp. 47-60, 81.

Leroux, E. Sur un paramètre de similitude mécanique dans le mouvement des fluides et son application à l'étude de la cavitation des hélices aériennes.

La Techn. Aéron., 16e année, n. s., Nos. 45, 46 (15 lull., 15 août 1925), Paris, pp. 210-214,226237, ill.

Lesley, E. P. See Diehl, Walter S., and E. P. Lesley: The reduction of airplane flight test data to standard atmosphere conditions.

Levasseur, Julien et Adrien. »See Blanehet, Georges: Aviateurs contemporains. Les frères Julien et Adrien Levasseur.

Levi-Civita, T. »See Civita, T. Levi-.

Lewis, C. G. »See Kemp, R. C., C. G. Lewis, C. W. Scott, and C. R. Robbins: Aerophoto survey and mapping of the forests of the Irrawaddy Delta.

Lewis, G. W. »See Cylinders: Rotating cylinders.

Lewitt, Ernest Henry. The rigid airship; a treatise on the design and performance.

London, New York, Sir I. Pitman & Sons, ltd., 1925, pp. x, 283, ill. The Specialists' series.

Lexington. U. S. S. Lexington, great airplane carrier, launched.

V. S. Air Services, Vol. 10, No. 11 (Nov. 1925), Weshington, pp. 31-32, ill.

Library. The aeronautic library.

National Aeronautic Association Review, Vol. 3, Nos. 7, 8 (July, Aug. 1925), Washington, D. C, pp. 104, 127.

License. Cross license agreement upheld. Attorney General Sargent renders important opinion.

Aviation, Vol. 18, No. 15 (April 13, 1925), New York, p. 413.

Lichtbild-Bühne. Im Auge über den Ozean. Berlin.

Liebers, F. »See Blenk, H., und F. Liebers: Gekoppelte Torsions- und Biegungsschwingungen von Tragflügeln.

Life belts. »See Seymour, L. D.: Aerial life belts.

Lift. »See Scarborough, James B. : Some problems on the lift and rolling moment of airplane wings.

Lift and drag. »See Green, Maurice W. : Determination of the lift and drag characteristics of an airplane in flight.

- »See Lock, C. N. H., and H. C. H. Townend: Lift and drag of two aerofoils measured over 360° range of incidence.

- »See Martin, H. M.: The elements of the Lanchester-Prandtl theory of

aeroplane lift and drag.

- »See Meredith, F. W.: Determination of lift and drag coefficients during

a stall by means of accelerometers.

- »See Royal Aircraft Establishment : The lift and drag of a standard Bristol

fighter aeroplane.

- »See Royal Aircraft Establishment: Lift and drag of standard Bristol

fighter with R. A. F. 4D engine. Comparative full scale and model tests.

- »See Royal Aircraft Establishment: Report of the design panel on the

scale effect on lift, drag, and center of pressure of complete aeroplanes.

Light airplanes. Aerodynamics. Light aeroplanes.

Aeronautics, Techn. Rep. Aer. Res, Com., 1923-24, Vol. 1, London, 1925, pp. 23-24.

Light airplanes. A basis for light 'plane competitions. Some suggestions for consideration.

Flight, Vol. 17, No. 26 (July 16, 1925), London, pp. 455- 457.

- The light aeroplane position.

The Aeroplane, Vol. 28, No. 18 (May 6, 1925), London, pp. 442, 444.

- Some light planes at the air races.

Aviation, Vol. 19 No. 17 (Oct. 26, 1925), New York, p. 594, ill.

-—— See Comper, N.: Some considerations in the design of a light aeroplane.

-- See Driggs, Ivan H.: The light airplane. Brief review of the results

obtained in the development of light airplanes—I. Modern theoretical aerodynamics as applied to light airplane design—II.

- See Driggs, Ivan H.: The light airplane. Modern theoretical aerodynamics

as applied to light airplane design with a series of charts—III. Design of an airplane with reference to physical dimensions, component weights, and disposition of surfaces—IV. Design of an airplane with reference to balance, distribution of weights, and momeuts.

- See Langsdorf!, Werner von: Das Leightflugzeug.

- See McLaughlin, George P.: American light planes.

- See McLaughlin, George F.: British two-seater light planes.

- See McLaughlin, George P.: The "light plane" problem.

- See Matthias, Joachim: Leichtflugzeuge als private Verkehrsmittel.

-- See National Advisory Committee for Aeronautics: Technical Memorandums No. 301. Light airplanes of France, Germany, Italy, Belgium, Holland, Czechoslovakia, and Lithuania.

Lighthouses. Air lighthouse of a billion candlepower.

Literary Digest, Vol. 86 (July 11, 1925), New York, p. 23, map.

-- De vuurtoren op den Mont Afrique.

Het Vliehveld, 9de Jaarg., No. 10 (Oct. 1925), Amsterdam, pp. 264-266, ill., map.

- See Dijon: The Dijon aerial lighthouse.

Lights. Die Deutsche Verkehrsausstellung. Raum 6b. Plugplätze und Nachtbeleuchtung.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9 Sept. 1925), München, pp. 354-357, ill.

- See Guibcrt, Michel: Le phare du Mont Afrique.

- See Mail: New airmail flood lights.

- See Norma: Les phares pour l'aero—navigation.

Lilienthal, Gustav. Die Biotechnik des Fliegens.

Leipzig, R. Voigtländers Verlag, 1925, pp. 104, ill.

Lilienthal effect. See Fick, Roderich: Relation of "Lilienthal effect" to dynamic soaring flight.

Lincoln. The Lincoln sport plane.

Slipstream, Vol. 6, No. 5 (May 1925), Dayton, Ohio, p. 18, ill.

- Lincoln standard light plane.

Aero Digest, Vol. 6. No. 1 (Jan., 1925), New York, p. 43. Flight, Vol. 17, No. 32 (Aug. 6, 1925), London, p. 494, ill.

Lind, S. Helium for aeronautic use.

National Aeronautic Association Review, Vol. 3, No. i (April 1925), Washington, D. C pp. 60-61.

Lind, S. C, and D. C. Bardwell. Mercury and ionized helium.

Science, n. s., Vol. 61 (Mar. 27, 1925), Garrison, N. Y., pp. 344-345.

Lind, Wallace Ludwig. Internal-combustion engines; their principles and application to automobile, aircraft, and marine purposes.

Annapolis, Md., The United States Naval Institute, 1925, pp. v, 266, ill., diagrs.

Lindholm, F. Exploration de la haute atmosphère par avion. Résultats d'une campagne de sondages aérologiques en Suède. Application aux records d'altitude.

L'Aéronautique, 7me année, No. 72 (mai 1925), Paris, pp. 161-164, ill.

Lippisch, Alexander. Theory of flapping flight.

National Advisory Committee for Aerouautics, Technical Memorandums No. 334, Oct., 1925, Washington, pp. 11, ill. From "Flugsport," June 17, 1925.

Litchfield, Paul W. Helium and its value for airships.

Aviation, Vol. 18, No. 10 (Mar. 9, 1925), New York, pp. 272-273, ill.

- Super-Zeppelin airship.

Aero Digest, Vol. 6, No. 1 (Jan., 1925), New York, pp. 11-13, ill.

Load. Pay, total, minimum, or contest load.

Aviation, Vol. 19, No. 23 (Dec. 7, 1925), New York, pp. 807-808.

- See Nobili, Umberto: Contributo sperimentale alio studio delle variazioni

di carico utile di un'aeronave.

Locarno. On the treaty of Locarno.

The Aeroplane, Vol. 29, No. 24 (Dec. 9, 1925), London, pp. 657-658.

Lock, C. N. H., H. Bateman, and H. C. H. Townend. The airflow round a body as affecting airscrew performance.

Aeronautical Research Committee, Reports and Memoranda, No. 956 (Ae. 174), January 1925, London, 1925, pp. 22, tabls., diagrs.

- Experiments to verify the independence of the elements of an airscrew

blade.

Aeronautical Research Committee, Reports and Memoranda, No. 953 (Ae. 172), November 1924, London, 1925, pp. 4, diagrs., tabls.

Lock, C. N. H., and H. Bateman. Experiments with a family of airscrews. Part III. Analysis of the family of airscrews by means of the vortex theory and measurements of total head.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 377-408, tabls., diagrs. Reports and Memoranda, No. 892, December, 1923. (Ae. 122.)

Lock, C. N. H., and H. C. H. Townend. Lift and drag of two aerofoils measured over 360° range of incidence.

Aeronautical Research Committee, Reports and Memoranda, No. 958 (Ae. 177), November 1914, London, 1925, pp. 5, tabls., diagrs.

Lock, C. N. H., and H. Bateman. The measurement of airflow round an airscrew.

Aeronautical Research Committee, Reports and Memoranda, No. 955 (Ae. 174), November 1924, London, 1925, pp. 15, tabls., diagrs.

Lock, C. N. H. On the system of vortices generated by a circular cylinder in steady motion through a fluid.

London, Edinburgh and Dublin Philosophical Magazine and Journal of Science, Vol. 50, No. 299 (Nov., 1925), London, pp. 1083-1089, ill.

Lock, C. N. H., and H. Bateman. Some experiments on airscrews at zero torque, with applications to a heliocopter descending with the engine "off" and to the design of windmills.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 368-376, tabls. Reports and Memoranda, No. 885, September, 1923. (Ae. 116.)

Loening. L'amphibie Loening.

L'Aérotechnique (L'Aéronautique, 7me année, No. 77), 3me année, Num. 34 (oct. 1925), Paris, p. 374, ill.

- The Loening amphibian.

Flight, Vol. 17, No. 21 (May 21, 1925), London, pp. 302-304, ill.

- Loening firm scores triumph. New type of airplane for army air service.

Slipstream, Vol. 6, No. 2 (Feb. 1925), Dayton, Ohio, pp. 14,16-17, ill. Amphihian.

- The Loening metal amphibian.

Flight, Vol. 17, No. 14 (Apr. 2, 1925), London, p. 197, ill.

- More details of the Loening Amphibian.

Aviation, Vol. 18, No. 18 (May 4, 1925), New York, p. 491.

- Successful tests of the Loening Amphibian.

Aviation, Vol. 18, No. 6 (Feb. 9, 1925), New York, p. 155, ill.

Loening, Gbover. Problems of the engineer in aviation.

TJ. S. Air Services, Vol. 10, No. 1 (Jan. 1925), Washington, pp. 38-40, ill.

London. London-Zurich and back on a light 'plane. Alan Cobham's fine performance on a D. H. "Moth."

Flight, Vol. 17, No. 23 (June 4, 1925), p. 335, 111,

London-Cape Town. The London-Cape Town imperial airway survey flight.

Flight, Vol. 17, No. 47 (Nov. 19, 1925), London, pp. 768-772, ill., map.

- The world's longest flight.

The Aeroplane, Vol. 29, No. 20 (Nov. 11, 1925), London, p. 556, ill.

Longstreth, T. M. Nipigon revisited; an airplane journey over a Canadian wildern esi.

Independent, Vol. 113 (Nov. 22, 1924), New York, pp. 417-419, ill.

Loriga. Le pilotage de l'autogire. Mes impressions de pilote au cours de trois vols.

L'Aérotechnique (L'Aéronautique 7me année, No. 68), Bulletin Mensuel, 3me année. Num. 25 (Jan. 1925), Paris, p. 13, ill.

- Trois vols décisifs, réussis à Madrid par le capitaine Loriga, prouvent le

haut intérêt de l'autogire.

L'Aérotechnique (L'Aéronautique, 7me année, No. 68), 3me année, Num. 25 (Jan. 1925), Peris, p. 15.

Lorraine-Dietrich. Le moteur Lorraine-Dietrich 450 CV, 12 cylindres en W. L'Aérophile, 33e année, Nos. 13-14 (ler-15 juil. 1925), Paris, p. 206.

Los Anoeles. Aboard the airship "Los Angeles" to Porto Rico and back. Literary Digest, Vol. 86, No. 1 (July 4, 1925), New York, pp. 58-62.

- The last Zeppelin—ours.

Literary Digest, Vol. 83, No. 4 (Oct. 25, 1924), New York, pp. 12-14, ¡11., map.

-- See Dirigibles: Can huge dirigibles supplant our expresses and liners.

- See Horsfall, Jessie E.: The "Los Angeles".

Louden, F. A. See Zahm, Albert Francis, R. H. Smith, and F. A. Louden: Air forces, moments and damping on model of fleet airship Shenandoah,

Low, A. R. The reaction of a stream of viscous fluid on a rotating circular cylinder.

Journ. Roy. Aer. Soc, Vol. 29, Nos. 170-171 (Feb. Mar. 1925), London, pp. 100-104, 141144, diagr.

Lubrication. See Bardel, Henri: Le graissage des moteurs à l'huile minérale.

- «See Champsaur, N. : Établissement du circuit du graissage sur avion.

- See Jancel, H.: Considérations pratiques sur le graissage des moteurs

d'avions commerciaux au moyen des huiles minérales.

- »See Oils: Les huiles de graissage au dernier Salon.

- »See Oils: Un régulateur de température d'huile.

Luckiesh, M. Aerial photometry and the visibility of airplanes.

Abstract No. 125. Abstract Bulletin of Nela Eesearch Laboratory. Incandescent lamp department of General F.lectric Company, Clevoland, Ohio, 1925, Vol. 1, No. 4 (Dec. 1925) pp. 660-682, ill.

- The Polar realms in one hour.

Slipstream, Vol. 0, No. 8 (Aug. 1925), Dayton, Ohio, pp. 10-13, 111.

Presented in part before Franklin Institute, January 1919. Complete papers Astrophyslcal Journal, Vol. 49, 1919, p. 108: Journal Franklin Institute, Vol. 187, 1919, pp. 289 and 409.

Lüscher, H. Ein neues Gerät für die kartenmässige Verarbeitung von Luftaufnahmen im ebenen Gelände.

Zeitschr. Flugt. Mot., 16. Jahrg., 7.Heft (14.April 1925), München, p. 157, ill.

Lundberg, Ilse. Etwas vom Fliegen.

Aut. Mot. Flug., 7. Jahrg., Nr. 10 (31.Mai 1925), Berlin, pp. 275-276, ill.

LuRiA, A. Light projection apparatus for assist-night flying. Ellettrotecnica, Vol. 12 (Jan. 5, 1925,) Milan, pp. 2-10.

Lympne. The English light plane meeting.

Aviation, Vol. 19, No. 10 (Sept. 7, 1925), New York, pp. 282-284, ill.

- The Lympne air meeting.

The Aeroplane, Vol. 29, No. 5 (July 29,1925), London, pp. 136-165, ill.

- Lympne August meeting official results.

Flight, Vol. 17, No. 34 (Aug. 20, 1925), London, pp. 537-538.

- Lympne en Vauville.

Het Vliegveld, 9 de Jaarg., No. 9 (Sept., 1925), Amsterdam, pp. 235-237, ill.

■- On the Lympne meeting.

The Aeroplane, Vol. 29, No. 6 (Aug. 5, 1925), London, pp. 170-190, ill.

- Performances at Lympne.

The Aeroplane, Vol. 29, No. 11 (Sept. 9, 1925), London, p. 320.

- R. A. C. August meeting at Lympne, 1925.

Flight, Vol. 17, No. 31 (July 30, 1925), London, pp. 477-483, ill.

- R. A. C. 1925 August meeting at Lympne.

Flight, Vol. 17, No. 32 (Aug. 6, 1925), London, pp. 497-511, ill.

Lynam, E. J. H. Experiments with a close tandem air screw pair.

Aerouautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 342-344, ill. Reports and Memoranda, No. 8S7. 20th March 1923. (E. 9.)

Lyons, James. Ontario's forest air patrol.

National Aeronautic Association Review, Vol. 3, No. 6 (June 1925), Washington, D. C, pp. 85-87,

M

M. L. Après le concours des hydravions de transport.

L'Aérophile, 33e année, Nos. 19-20 (ler-15 Oct. 1925), Paris, pp. 310-312.

- Le concours d'aviation de tourisme.

L'Aérophile, 33e année, Nos. 19-20 (ler-15 Oct. 1925), Paris, pp. 296-300, 111.

- Le concours d'hydravions de transport.

L'Aérophile, 33e année, Nos. 17-18 (ler-15 sept. 1925), Paris, pp. 259-261, ill.

- Raids, records et performances.

L'Aérophile, 33e année, Nos. 1-24 (ler-15 Jan.-ler-15 déc. 1925), Paris, pp. 7-9, 46-48, 71-72, 109-110, 145-146, 1S1-182, 197-199, 262-264, 301-303, 326-329, 362-363, ill.

- La réorganisation des forces aériennes britanniques.

L'Aérophile, 33e année, Nos. 5-6 (ler-15 mars 1925), Paris, pp. 73-74.

- Le voyage de Sir Sefton Brancker de Londres à Rangoon et retour.

L'Aérophile, 33e année, Nos. 13-14 (ler-15 Juil. 1925), Paris, pp. 219-220, map.

M. R. Une application du phénomène de Magnus à la sustentation des avions. L'Aérophile, 33e année, Nos. 21-22 (ler-15 nov. 1925), Paris, pp. 339-341, ill.

McCarthy, Charles J. Notes on metal-wing construction.

U. S. Air Services, Vol. 10, No. 3 (Mar. 1925), Washington, pp. 9-16, ill.

McClure, D. Like the dove from the ark; launching an airplane by a dirigible. St. Nicholas, Vol. 52 (Dec. 1924), New York, pp. 206-207, ill.

McConnell, Burt M. Air mail service makes good.

Review of Reviews, Vol. 71 (Mar. 1925), New York, pp. 301-306, ill.

--Tales of the air mail pilots.

u. S. Air Services, Vol. 10, No. 12 (Dec. 1925), Washington, pp. 39-45, ill.

McCook Field. "Greater McCook field" remains near Dayton. Slipstream, Vol. 6, No. 1 (Jan. 1925), Dayton, Ohio, pp. 21-22.

- See Curry, John F. : McCook field accomplishments of past years.

- See McMahon, T. C: Something about McCook Field.

McDarment, Corley. Leap and live to leap again; parachute history made in America.

Saturday Evening Post, Vol. 198 (July 11, 1925), Philadelphia, pp. 10-11, ill.

- Stepping out into space.

Saturday Evening Post, Vol. 197 (Nov. 29, 1924), Philadelphia, pp. 12-13, ill.

- What we could do in the air if we had to.

Literary Digest, Vol. 84, No. 8 (Feb. 21, 1925), New York, pp. 60-64, ill.

- See Human wings: Human wings foreseen by a scientific prophet.

- See Metal construction: Coming: The all-metal airplane.

- See Smoke-screens: Smoke-screens dropping from the sky.

McGee, George. See Wood, Henry, and George McGee: Aircraft experiments for the locating of herring shoals in Scottish waters, 1924.

McIntyre, M. H. The Naval air battle of the future.

Aviation, Vol. 18, No. 22 (June 1, 1925), New York, p. 608.

Macheny, Louis. See Blanchet, Georges: Aviateurs contemporains. André Corouge et Louis Macheny.

Macholz. Eröffnung der Luftschiffahrtsausstellung auf der Deutschen Verkehrsausstellung München.

Aut. Mot. Flugw., 7. Jahrg., Nr. 15 (15. Aug. 1925), Berlin, pp. 416-418, ill.

Macholz, Gustav. D-Züge der Luft.

Aut. Mot. Flugw., 7. Jahrg., Nr. 7 (15. Apr. 1925), Berlin, p. 191,111.

Macholz, Gustav E. Der deutsche Rundflug.

Aut. Mot. Flugw., 7. Jahrg., Nr. 18 (1. Okt. 1925), Berlin, pp. 601-503.

- Flug und Film.

Aut. Mot. Flugw., 7. Jahrg., Nr. 6 (31. März 1926), Berlin, p. 163.

- Luftikus auf Reisen.

Aut. Mot. Flugw., 7. Jahrg., Nr. 11 (15. Juni 1925), Berlin, p. 305.

McKat, H. C. Practical kinematography: Airplane work.

Photo-Era, Vol. 55 (Deo. 1925), Wolteboro, N. H., pp. 327-329.

McLaughlin, George F. American light planes.

Aero Digest, Vol. 6, No. 2 (Feb. 1925), New York, p. 103, 111.

--■ British two-seater light planes.

Aero Digest, Vol. 6, No. 4 (April 1925), New York, pp. 208-209, ill.

- De Havilland moth.

Aero Digest, Vol. 6, No. 5 (May 1925), New York, p. 264, diagr.

- The Dormoy monoplane.

Aero Digest, Vol. 6, No. 5 (May 1925), New York, p. 263, ill.

- Heinkle instruction plane.

Aero Digest, Vol. 6, No. 6 (June 1925), New York, p. 316, ill.

- The La Cierva "Autogiro."

Aero Digest, Vol. 7, No. 6 (Deo. 1925), New York, pp. 660, 68S, ill.

- The "light plane" problem.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, p. 42, 111.

- The Nordman monoplane glider.

Aero Digest, Vol. 6, No. 3 (Mar. 1925), New York, p. 152, ill., diagr.

- The Powell light plane racer.

Aero Digest, Vol. 7, No. 6 (Nov. 1925), New York, pp. 612, 630, ill., diagr.

- Round-Germany flight.

Aero Digest, Vol. 7, No. 2 (Aug. 1925), New York, pp. 426-427, 111.

- Vanderbilt's air yacht.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, pp. 371-372, ill.

McLennan, J. C. Helium gas and its uses.

Scientific Monthly, Vol. 20 (Apr. 1925), Garrison, N. Y., pp. 424-427.

McLeod, Clarence J. Bill to aid commercial aviation. Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, p. 28.

- When Congress convenes.

Aero Digest, Vol. 7, No. 6 (Dec. 1925), New York, pp. 661, 690, port.

McMahon, T. C. Something about McCook Field.

Aero Digest, Vol. 6, No. 4 (April 1925), New York, pp. 193-196, ill.

MacMillan. See Byrd, R. E.: Navigation problems of the MacMillan expedition.

- See Polar flight: Navy planes to explore Arctic with MacMillan.

MacMillan-Navy expedition. MacMillan-Navy expedition sails. Aviation, Vol. 18, No. 26 (June 29, 1925), New York, p. 721.

McNalli, Fred L. Charting invisible airways. From an interview with Fred L. McNally.

Slipstream, Vol. 6, No. 1 (Jan. 1925), Dayton, Ohio, pp. 30-31.

Maoaldi, Gitjlio. Hulls for large seaplanes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 295, Jan. 1925, Washington, p. 20, ill. From "La Technique Aéronautique," Oct. 15, 1924.

Maqnan, Antoine. L'aviation sans moteur.

Bulletin du Laboratoire de morphologie expérimentale et d'aviation de l'école des Hautes Études. Paris, Roche d'Estrez, 1924.

- Le vol à voile avec contribution à l'étude expérimentale de la physique

et de la mécanique des fluides. Tome I Étude des courants aériens; l'utilisation du vent par les oiseaux voiliers; charactéristiques des oiseaux volant à voile.

Paris, G. Roche d'Estrez, 1925, pp. 254, ill.

- See Huguenard, E., A. Magnan et E. Planiol: Contribution à l'étude de

la structure interne du vent.

- See Huguenard, E., A. Magnan et A. Planiol: Étude sur l'énergie interne

du vent, son rôle dans le vol à voile et la navigation aérienne.

- See Huguenard, E., A. Magnan, and A. Planiol: Sur la mesure des efforts

aérodynamiques supportés par la voilure d'un avion.

- See Huguenard, E., A. Magnan, et A. Planiol: Sur un appareil à fil chaud

pour la détermination des grandes altitudes.

- See Huguenard, E., A. Magnan et A. Planiol: Sur un appaiïel mesurante

les déformations des ailes.

- See Huguenard, E., A. Magnan et A. Planiol: Sur une méthode d'étude

des efforts d'inertie résultant des manœuvres de pilotage des avions.

Magnesium. See Propellers: First magnesium propeller meets test well. «

- See Propellers: First magnesium propeller successfully tested.

Magnetos. See Scintilla magneto: The Scintilla magneto for aircraft engines.

Maoni. Magni air resistance brake.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, p. 494, ill.

Maoni, Piero. Aeroplani a finezza variabile. Pisa, F. Mariotti.

Maonus effect. Magnus effect in aviation.

Scientific American, Vol. 132 (May 1925), New York, pp. 343-344.

- See Ackeret, J.: Neuere Untersuchungen der Aerodynamischen Versuchsanstalt, Göttingen.

- See Betz, A.: The "Magnus effect," the principle of the Flettner rotor.

- See Betz, A.: Der Magnus-Effekt, die Grundlage der Flettnerwalze.

- See Bose, N. K.: Hydrodynamical principles of Herr Flettner's "Rotor

ship."

- See Bouligand, G.: Une méthode approchée pour étudier le mouvement

de certains anneaux tourbillonnaires.

- See Delanghe, G.: Les théories de l'aérodynamique moderne.

- See Klemin, Alexander: Is the Magnus effect applicable to aircraft?

- See Lafay, A.: Sur les déviations de la poussée du vent, sur un cylindre,

produites par une lame d'air jaillissant tangentiellement à la surface de ce corps.

Magnus effect. See M. R. : Une application du phénomène de Magnus à la sustentation des avions.

- See Prandtl, L. : Magnuseffekt und Windkraftsehiff.

- See Roy, Maurice: A propos de l'aérodynamique du cylindre. Le

phénomène de Magnus. Son application à la propulsion des navires.

- See Sandel: Zur Aerodynamik des Magnuseffektes.

Maiuen Dearborn. See Ford: Now for the Aying flivver. Mail. Air mail radio signal developed.

Aviation, Vol. 19, No. 20 (Nov. 16, 1925), New York, pp. 720-721.

- The air mail service.

Journ. Soc. Automotive Engineers, Vol. 16, No. 3 (Mar. 1925), New York, pp. 272-274., ill

- Air mails.

Flight, Vol. 17, No. 20 (May 14, 1925), London, p. 291.

- British air mails in 1924.

Flight, Vol. 17, No. 2 (Jan. 8,1925), London, p. 21.

- A convincing demonstration. The first round-trip night air mail letter.

New York—Chicago—New York.

Aviation, Vol. 19, No. 3 (July 20, 1925), New York, p. 69, ill.

- The first commercial night mail.

The Aeroplane, Vol. 29, No. 3 (July 15, 1925), London, pp. 86, 88, ill.

- The first "Flying truck" for air mail. Curtiss "Carrier Pigeon."

Slipstream, Vol. 6, No. 3 (Mar. 1925), Dayton, Ohio, pp. 21-22, ill. ■

- Grazing tragedy with the air mail.

Literary Digest, Vol. 87 (Oct. 17, 1925), New York, pp. 83-87.

- The new air mail contracts.

Aviation, Vol. 19, No. 16 (Oct. 19, 1925), New York, p. 552.

- New airmail flood lights.

Aviation, Vol. 19, No. 19 (Nov. 9,1925), New York, p. 684, ill.

- New mail planes.

Scientific American, Vol. 132 (May 1925), Now York, pp. 342-843, ill.

- The new mail routes.

Ayiation, Vol. 19, No. 4 (July 27, 1925), New York, p. 93.

- New night air mail between New York and Chicago.

Literary Digest, Vol. 86 (July 4,1925), New York, p. 64.

- New York-Chicago night air mail.

Aviation, Vol. 19, No. 2 (July 13, 1925), New York, pp. 38-40, ill.

- New York-Chicago night air mail service.

Flight, Vol. 17, No. 35 (Aug. 27, 1925), London, pp. 555-556.

- Now York-Chicago night mail schedule.

Aviation, Vol. 18, No. 26 (June 29, 1925), New York, p. 720.

- Over the perilous path of the air mail.

Literary Digest, Vol. 84, No. 11 (March 14, 1925), New York, pp. 73-78.

- Post Office air mail bids opened. Nineteen bids tendered on eight new

air mail routes.

Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, p. 382.

- Regulations for air mail routes. Details of the regulations promulgated

by Col. Paul Henderson, Second Assistant Postmaster General, for private air-mail routes.

Aviation, Vol. 18, No. 17 (Apr. 27, 1925), New York, pp. 458-460.

Mail. Les taxes de transit et le courrier postal.

L'Aéronautique Marchande (L'Aéronautique, 7m année, No. 68), 4™« année. Num. 37 (Jan. 1925), Paris, pp. 33-34, ill.

- See Abeelen, van den: De Amerikaansche luchtpostdienst. -

- See Boeing: The Boeing air mail plane.

-- See Carlin, J. L. : An arduous route. Detailed story of the new South

African air mail service.

——• See Carlin, J. L. : A new air mail. One thousand mile coastal route in South America.

- See Chicanot, E. L. : The romance of Canada's first aerial mail.

- See Cox-Klemin: Cox-Klemin mail plane. The "Nighthawk".

- See Curtiss: The Curtiss Carrier Pigeon. A new machine built specially

for overnight air mail service.

- See Dane, Roger: Midnight suns of the air mail.

- See Douglas : Characteristics of the Douglas air mail plane.

—— See Douglas: The Douglas D. A. M. 2 biplane. The American machine designed for air mail service.

- See Glover, W. Irving: W. I. Glover to be new air mail chief.

- See Greene, Howard E.: Make way for the New York-Chicago night air

mail.

- See Hangars: Housing the air mail.

- See Henderson, Paul: The air mail—its future.

- See Lasky, Jesse L. : The air mail in motion pictures.

- See Meadowcraft, Norman: The aerial Mercury air mail plane.

- See New, Harry S. : The United States air mail.

- See Sarigny, René de: South Africa's air mail.

- See Scott, Paul P. : Plying the night mail.

- See Scott, Paul P. : Miraculous adventure of an air mail pilot.

- See Truby, Harry A. : The aerial postal epoch.

- See Union of South Africa: The Durban-Cape Town air mail.

- See United States: Eenige cijfers betreffende den Amerikaanschen

luchtpostdienst.

Mallock-Ahmsteong. Mallock-Armstrong ear defender. Flight, Vol. 17, No. 3 (Jan. 15, 1925), London, p. 31, ill.

Manifolds. See Royal Aircraft Establishment : Exhaust manifold temperatures.

Manœxivees. On manœuvres.

The Aeroplane, Vol. 29, No. 14 (Sept. 30, 1925), London, pp. 385-390.

Maps. See Aschenbrenner, C: Ueber ein neues halbautomatisches Entzerrungsgerät für den praktischen topographischen Gebrauch.

- See Beadle, J. B.: Airplane speeds up power surveys.

- See Berejkoff, A. P. : Aerial map of the world.

- See Brock, N. H. : Brock development of aerial mapping.

53466—28-8

Maps. See Cochran-Patrick, C. K. : Air surveys in Burma.

- See Edwards, J. T. : Aviation maps.

- See Matthes, Gerard H.': Why aerial maps are the best.

- See Passy, P. De L. : Aerial photographs aid the map maker.

- See Pierce, J. W. : Aerial photographs, surveys, and maps.

- See Plank, Edward G. : Aerial mapping.

- See Ridgway, Allen : Airways and air maps.

- See Robinson, E. : Equipment used for aerial surveying.

- See Wyatt, B. H. : Mapping our roughest region.

Mara, Wm. A. The $10,000,000 airline.

Slipstream, Vol. 6, No. 6 (June 1925), Dayton, Ohio, pp. 11, 21, ill.

Marchand, Jean. La solution de M. Louis Damblanc au problème de l'aviation aux hautes altitudes.

La Science et la Vie, Tome 27, No. 96 (juin 1925), Paris, pp. 519-520, ill.

Marcotte, Ed. La lumière intensive, phares et projecteurs. Paris, Payot.

Marie, Félix. Les origines de l'aéronautique militaire. Charles Lavauzelle, éditeur.

Mariéni, G. La navigazione aerea commerciale.

L'Aerotecnica, Vol. 5, N. 2 (Marzo-Aprile 1925), Pisa, pp. 81-92.

- Il più grande volo del mondo (raid di 55 mila km.) '

L'Aerotecnica, Vol. 5, N. 6 (Nov.-Dic. 1925), Pisa, pp. 335-336.

Mark III. See Royal Aircraft Establishment: Flight tests with R. A. E. electrical indicator.

Marks, Lionel S. Mechanical engineers handbook. (Section on Aeronautics arranged by J. C. Hunsaker.)

Mars, James A. Government must encourage commercial aviation. TJ. S. Air Services, Vol. 10, No. 6 (June 1925), Washington, pp. 27-30.

Marsh, Lockwood. See Military aeronautics: The terror of the air.

Marshall, C. F. Dendy. The resistance of express trains. London, The Railway Engineer, 1925.

Marshall, Edward. Daniel Guggenheim says we must not let air supremacy slip. 1

Aero Digest, Vol. 7, No. 2 (Aug. 1925), New York, pp. 407-409, 452, ill.

- Winning the Pulitzer race. An interview with "Cy" Bettis.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, pp. 591, 632, ill.

Martin, H. M. Electric dynamometers in engine development.

Aviation, Vol. 18, No. 4 (Jan. 26, 1925), New York, pp. 105-106, ill.

- The elements of the Lanchester-Prandtl theory of aeroplane lift and drag.

London, Office of Engineering.

Martinot-Lagarde. Recherches expérimentales sur la distribution des vitesses dans un coûtant gazeux.

Bulletin Technique N. 22 du Service Technique de l'Aéronautique.

Martinot— Lagarde, C. Le véhicule automobile au service de l'aviation. L'Aéronautique, 7me année, No. 70 (mars 1925), Paris, pp. 109-116, ill.

Mabtucci, M. Le ripercussioni dei progress] dei mezzi bellici terrestri, navali e aerei sull'impiego dell'aviazione.

Blvista Aeronautica, Anno 1, N. 1 (Luglio 1925), Roma, pp. 1-15.

Mabtse, Louise. Comment je suis devenue aviatrice.

L'Aérophile, 33a année, Nos. 19-20 (lar-15 oct. 1925), Paris, p. 308, port.

Mason, W. The effect of a temperature of 212° F. on steel submitted to alternating torsion.

Aeronautics. Techn. Rap. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 569-580, diagrs., tahls. Reports and Memoranda, No. 863. February, 1923. (M. 21.)

Mason, Wilmeb G. Glenn Curtiss predicts. An interview.

Aaro Digest, Vol. 6, No. 6 (June 1925), New York, pp. 310,342,"ill.

Massachusetts Institute op Technology. The M. I. T. aeronautical course. Aviation, Vol. 19, No. 2 (July 13, 1925), Naw York, pp. 42-43, ill.

Matebials. See Case, John: The strength of materials; a treatise on the theory of stress calculations for engineers.

- See Chollet, L.: Les étoffes baudruchées en aérostation.

- See Lecœuvre, R.: Les matières premières de la construction aéronautique

au Salon.

- See Moore, Walter M.: Flying wood.

Materials and Chemistby. Materials and chemistry.

Aeronautics. Techn. Hep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 33-40.

Matteuzzi, L. Sulla previsione sistematica della pressione barometrica.

Rend. Teen. Dir. Sup. Genio Costr. Aar., Anno 13, N. 6 (15 Qiugno 1925), Roma, pp. 13-17, diagrs.

Matthes, Gebabd H. Why aerial maps are the best.

U. S. Air Services, Vol. 10, No. 4 (April 1925), Washington, pp. 45-46. <

Matthews, Robebtson. Discharge characteristics of a high-speed fuel-injection system.

National Advisory Committee for Aeronautics, Technical Notes No. 213, Fab. 1925, Washing ton, p. 21, ills., diagrs.

Matthias. Zum ersten "Flugtechnischen Sprechabend" 1925-26 der Wissenschaftlichen Gesellschaft für Luftfahrt am 27. Oktober 1925. Aut. Mot. Flugw., 7. Jahrg., Nr. 23 (15. Dez., 1925), Barlin, p. 663.

Matthias, Joachim. Etwas über Flugunfallursachen.

Aut. Mot. Flugw., 7. Jahrg., Nr. 20 (31. Okt., 1925), Berlin, pp. 557-561, ill.

- Leichtflugzeuge als private Verkehrsmittel.

Aut. Mot. Flugw., 7. Jahrg., Nr. 17 (15. Sept., 1925), Barlin, pp. 475-477, ill.

- Nachtflug mit der Junkers "G 23". Beginn des Personen-Nachtflugverkehrs mit Grossflugzeugen.

Aut. Mot. Flugw., 7. Jahrg., Nr. 24 (31. Dez., 1925), Berlin, pp. 693-694, ill.

- Der Spaltflügel im Flugzeugbau. Erhöhung der Flugsicherheit und

Vergrösserung der Wirtschaftlichkeit.

Aut. Mot. Flugw., 7. Jahrg., Nr. 23 (15 Daz., 1925), Berlin, pp. 663-664.

Mattison, G. C. Aerial survey of the Mississippi River delta.

United States Coast and Geodetic Survey, Topography, Special Publication No. 105, Washington, 1924, pp. 65, ill., map.

Maxim, Hudson. Airplanes in next war.

Aaro Digest, Vol. 6, No. 4 (Apr., 1925), Naw York, pp. 183-185, ill.

Maxson, Herbtjrt W. First semirigid airship to be designed and built in United States.

TJ. S. Air Services, Vol. 10, No. 5 (May, 1925), Washington, pp. 37-38, ill.

Maxwell, F. R., Jr. A suggested race for small airships.

Aviation, Vol. 19, No. 20 (Nov. 16, 1925), New York, pp. 715-716, ill.

Mat, Jacques. Ader n'est plus.

L'Aérophile, 33e année, Nos. 9-10 (ler-15 mai, 1925), Paris, p. 131, ill.

Mazer. Airplane parachutes.

National Advisory Committee for Aeronautics, Technical Memorandums No. 322, Aug. 1925 (Sept. 4, 1925), Washington, pp. 47, ill.

From "Bulletin Technique," Aug. 1924, of the Service' Technique de l'Aéronautique, France. ,

Mazer, P. Les parachutes d'avion en France.

L'Aéronautique, 7me;année, No. 72 (mai 1925), Paris, pp. 170-172, ill.

- La reconnaissance photographique à haut rendement.

L'Aéronautique, 7me année, No. 79 (déc. 1925), Paris, pp. 469-472, ill.

Meab, G. J. The development of the air-cooled aviation engine.

Tech Engineering News, Vol. 6, No. 5 (Dec. 1925), Cambridge, pp. 1S4-185, 206, 208, ill.

- Some aspects of aircraft-engine development.

Journ. Soc. Aut. Eng., Vol. 17, No. 5 (Nov. 1925), New York, pp. 496-507, ill.

Meadowcraft, Norman. The aerial Mercury air mail plane.

Aviation, Vol. 18, No. 13 (Mar. 30,1925), New York, pp. 342-343, ill.

- Practical notes on airship construction.

Aero Digest, Vol. 6, Nos. 1-6, Vol. 7, No. 1 (Jan.-July, 1925), New York^pp. 29-30; 85, 87; ' 146, 170; 205, 226; 262; 311-312, 342; 336-337, dia'gr.

Mechanical engineering. Progress in aeronautics as related to mechanical engineering.

Mechanical Engineering, journal of the Society of Mechanical Engineers, Vol. 47, No. 12 (Dec. 1925), New York, pp. 1133-1135.

Medical aspects. See Heald, C. B.: Some medical aspects of air transport. Medical attention. See Apolloni, Giovanni: Apparecchi sanitari.

- See Health: Das Sanitätsflugwesen.

Medical science. See Aviators: Progetto di massima di un impianto di cassone pneumatico da far sorgere al campo di aviazione di Montecelio per le prove psicofisiologiche degli aviatori.

Medicine. See D., Ch.: L'exposition des avions sanitaires.

- See Koschel, E.: Die Deutsche Verkehrsausstellung. Raum 6a. Medizinische Forschung.

- See Morocco: L'aviation sanitaire au Maroc.

- See Siam: L'aviation sanitaire au Siam.

Mediterranean. Deux voyages d'étude en Méditerranée. Démonstrations et projets français d'aéronautique marchande.

L'Aéronautique, 7me année, No. 79 (déc. 1925), Paris, pp. 441-443, ill.

- Flying boats in the Mediterranean.

The Aeroplane, Vol. 28, No. 6 (Feh. 11, 1925), London, pp. 126-128.

- The operation of flying boats in the Mediterranean.

Flight, Vol. 17, No. 8 (Feh. 19,1925), London, pp. 101-102.

- See Salmson, C. R.: The operation of flying boats in the Mediterranean.

Meisinger. The Meisinger aerological research fund.

u. S. Air Services, Vol. 10, No. 8 (Aug. 1925), Washington, p. 31.

Meissner, K. L. Alloys similar to duralumin made in other countries than Germany.

National Advisory Committee for Aeronautics, Technical Memorandums No. 314, May 1925, Washington, pp. 7. From "Zeitschrift für Metallkunde," 1925.

Menier, Gaston. Y a-t-il une crise de pilotes?

L'Aérophile, 33e année, Nos. 21-22 (ler-15 nov., 1925), Paris, pp. 323-324, port.

Mercury. See Meadowcraft, Norman: The aerial Mercury air mail plane.

Mercury, Jr. The Mercury Jr.

Aviation, Vol. 19, No. 19 (Nov. 9, 1925), New York, p. 682, ill.

Meredith, F. W. Determination of lift and drag coefficients during a stall by means of accelerometers.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 263-272, ill., diagrs. Reports and Menoranda, No. 861. March 1923. (Ae. 100.)

- Full scale determination of the characteristics of a variable pitch air screw.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 328-330, ill., diagrs. Reports and Memoranda, No. 780. March 1923. (Ae. 108.) .

Merrill, Albert. New air balance and small wind tunnel.

Aviation, Vol. 18, No. 13 (Mar. 30, 1925), New York, pp. 350-351, ill.

Merten, W. J. The metallurgical engineering of air craft propeller hubs.

Transactions.of the American Society for Steel Treating, Vol. 7, No. 6 (June 1925), Cleveland, pp. 718-726, ill.

Metal. Fire prevention on heavier-than-air craft. The fire risk of hot metal.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 42-43.

- See Wood: Hout of metaal?

Metal airplanes. See Surveying: Aerial surveying equipment—helicopters— production airplanes of metal.

Metal construction. Coming: The all-metal airplane.

Literary Digest, Vol. 84, No. 5 (Jan. 31, 1925), New York, pp. 24-25, ill.

- Details of French metal construction.

Aviation, Vol. 18, No. 6 (Feb. 16, 1925), New York, p. 187, diagr.

- Entwicklung und gegenwaertiger Stand des Metallflugzeugbaues.

Dresden, Helmuth Drescha.

- Metal construction in France and England.

The Aeroplane, Vol. 28, Nos. 2-3 (Jan. 14-21, 1925), London, pp. 32, 56.

- The metal construction of aeroplanes. Its advantages—Its present

state—Its future.

Flight, Vol. 17, No. 52 (Dec. 24, 1925), London, pp. 843-844.

- Metal Pullmans of the air provide luxuries.

Popular Mechanics, Vol. 44 (July 1925), Chicago, p. 46, ill.

- See Kingston: All-metal flying-boat hulls.

- See Kingston: The "Kingston" metal-hull flying boat.

- See Loening: The Loening metal amphibian.

- See McCarthy, Charles J.: Notes on metal-wing construction.

-- See Propellers: Metal air-screw progress.

- See Scherschevsky, A.: Das erste russische Ganzmetallflugzeug.

- See Wibault, Michel: Principes de construction d'un avion entièrement

métallique.

Metal construction. See Wboster, S. H.: The case for the metal propeller.

- See Fréchet, Charles: Le développement des hélices métalliques Reed.

Metal work. See Paris: Some examples of French metal work from the Paris show.

. Metals. See Fatigue of metals : Materials and chemistry. Fatigue of metals. -■ See Fatigue of metals: Some fatigue tests on nonferrous metals.

- See Fleury, de: Influences fondamentales des emplois des métaux légers

sur les rendements thermodynamiques et mécaniques des moteurs à explosion.

- See Otey, N. S.: Testing metals for aircraft.

- See Portevin: L'étude rationnelle des traitements thermiques des alliages

et des alliages léergs d'aluminium en particulier.

Meteorology. High altitude winds.

Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, p. 392, chart.

- Meteorology and aeronautics.

Aviation, Vol. 19, No. 14 (Oct. 5, 1925), New York, p. 440.

- Meteorology and navigation.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 44-45.

-- See Air Ministry: Report of Advisory Committee cm Atmospheric Pollution, year ending March 31, 1925.

- See Barlow, B. W. : The upper air circulation of the Atlantic Ocean.

- See Commission for the Exploration of the Upper Air: 1925, London.

—— See Dietzius, Robert: Die Genauigkeit der trigonometrisch bestimmten Ballonhöhen und Steiggeschwindigkeiten.

- See Dietzius, Robert: Zur Fälschung der Bahnen von Pilotballonen durch

vertikale Luftströmungen.

- See Durward, J.: Investigation of the winds in the upper air from information regarding the place of fall of pilot balloons and the distribution of pressure.

- See Fischli, Fritz : Aeronautische météorologie.

—— See Great Britain: Annual report of the meteorological committee to the Air Council, for the year ended March 31, 1925.

- See Gregg, Willis Ray: Aeronautical meteorology.

- See Gregg, Willis Ray: Chasing weather secrets in airplanes.

- See Hann-Süring: Lehrbuch der Meteorologie.

- See Helffrich: Klimatologie und Luftschiffahrt.

- See Johnson, N. K. : Short-period variations of the wind.

- See Lindholm, F.: Exploration de la haute atmosphère par avion.

- See Matteuzzi, L.: Sulla previsione sistematica della pressione barometrica.

- See Reed, Thomas R.: Meteorological aspects of the San Francisco-

Hawaii airplane flight. >

-- -.See Reichelderfer, Francis W.: The present meteorological needs of

aeronautics.

Meteorology. See Schmauss: Die Deutsche Verkehrsausstellung. Raum 8. Meteorologie.

- See Seilkopf, Heinrich : Meteorologische Studienfahrten über • den Atlantik und die meteorologische Beratung transatlantischen Luftverkehrs.

- See Seilkopf, Heinrich: Die Wetterberatung der Amerikafahrt des LZ 126.

- See Sen, Sachindra Nath.: Surface and geostrophic wind components at

Deerness, Holyhead, Great Yarmouth, and Scilly.

- See Simpson, G. C. : Thunderstorms and aviation.

- See Stewart, C. D.: The measurement of upper wind velocities by observations of artificial clouds.

- See Thunderstorms: Onweders en luchtvaart.

- See Toussaint: Étude sur la structure interne, et la turbulence du vent

naturel, dans les couches inférieures de l'atmosphère.

Mexico. Aviation in Mexico. j , ,;•

Flight, Vol. 17, No. 11 (Mar. 12,1925), London, pp. 143-144.

Meyer, C. W. Erich. Deutsche Verkehrsflugzeuge: Das sechssitzige JunkersGanzduralumin-Verkehrsflugzeug Type F. 13. Dresden, Verlag: Hellmut Drosche, 1925.

- Entwicklung und gegenwärtiger Stand des Metallflugzeugbaues.

Dresden, Verlag: Deutsche Motor-Zeltschrift, 1925, pp. 31, ill.

Meyer, R. Luftfahrzeuge und Luftfahrzeugmotoren.

Dresden, Verleg: Deutsehe Motor-Zeitschrift. Ausgabe I der Deutschen Kraftfahrzeng-Typenschau.

Mezerques. L'aviation française au Maroc. '

L'Aéronautique, 7me année, No. 74 (juil. 1925), Paris, p. 241, port.

Military aeronautics. Air power and war rights.

Flight, Vol. 17, No. 4 (Jan. 22, 1925), London, pp. 46-47.

- Air service and national defense.

'Outlook, Vol. 139 (Mar. 18,1925), New York, pp. 405-406.

- Aircraft defense more expensive than battleships?

Aviation, Vol. 18, No. 1 (Jan. 5, 1925), New York, p. 19.

- Airplane-battleship rumpus.

Literary Digest, Vol. 84 (Mar. 7, 1925), New York, pp. 8-9. '

- American bombers and Riff babies.1 •"

Literary Digest, Vol. 87 (Oct. 31, 1925), New York, pp. 29-30.

- America's drooping wings. > - >

Literary Digest, Vol. 84 (Jan. 10,1925), New York.pp. 14-15. . . ,'

- Army, navy and the airplane.

Literary Digest, Vol. 84 (Mar. 14, 1925), New York, pp. 71-72.

- Comparative air power.

Aviation, Vol. 19, No. 25 (Dec. 21,1925), New York, p. 875.

- Fur flies in air vs. seapower attack. ,

Current Opinion, Vol. 78 (Apr. 1925), New York, pp. 400-401.

- How 400 planes could demolish Paris.

Literary Digest, Vol. 87 (Nov. 7, 1925), New York, pp. 72-74.

- On high speed fighters.

The Aeroplane, Vol. 29. No. 9 (Aug. 26, 1925), London, pp. 260,262.

Military aeronautics. Our fighting flyers in Morocco.

Literary Digest, Vol. 87 (Oct. 3, 1925), New York, p. 10, ill.

- Paralyzing the third arm of national defense.

Independent, Vol. 113 (Dec. 13,1024), New York, p. 501.

- Shall the air giants move west?

Literary Digest, Vol. 86 (Aug. 29, 1925), New York, p. 10.

- The terror of the air.

Literary Digest, Vol. 85, No. 10 (June 6, 1925), New York, pp. 22-23, ill.

- War in the air and disarmament.

Review of Reviews, Vol. 71 (Mar. 1925), New York, pp. 308-310.

- Will sea power be displaced by air power? battleship vs. airplane; pro

and con.

Congressional Digest, Vol. 4 (Apr. 1925), Washington, pp. 240-241.

- With the new mosquito fleet.

Popular Mechanics, Vol. 42 (Dec. 1926), Chicago, pp. 906-908, ill.

- See Chandler, C. de F.: Airships for military purposes.

- See Garibaldi, Peppino: Will airplanes end war?

--See Germany: Les nouvelles regis de discrimination des avions militaires

pour l'Allemagne.

- See Hall, R. F.: A scheme of aerial bombardment.

- See Maxim, Hudson: Airplanes in next war.

- See Mitchell, William: Neither armies nor navies can exist unless the air

is controlled over them.

- See Mitchell, William: Winged defense; the development and possibilities

of modern air power—economic and military.

- See Morris, Joseph: The German air raids on Great Britain 1914-1918.

- See Niessel, A.: Le personnel de l'aviation militaire.

- See Oppenheimer, Fritz: Rechtswidriger Flugzeugbau im Kriege.

- See Patrick, Mason M.: Military aircraft and their use in warfare.

- See Robertson, F. A. de V.: The R. A. F. in army manoeuvres.

- See Sayers, W. H.: Aircraft development policy for military purposes.

- See Scammell, J. M.: Some lessons from the recent uses of aircraft in

minor warfare.

- See Stewart, Oliver: The strategy and tactics of air fighting; with introduction by W. G. Barker.

Miller, Elton W. See Münk, Max Michael, and Elton W. Miller: Model tests with a systematic series of 27 wing sections at full Reynolds number.

Miller, J. E. How it feels to fly 300 miles an hour.

Popular Mechanics, Vol. 43 (Jan. 1925), Chicago, pp. 1-3, ill.

Mingos, Howard. Eyes in the sky; airplane photography.

Photo-Era, Vol. 54 (Apr. 1925), Wolfehöro, N. H., pp. 185-193.

- Man who sold the airplane to Ford.

World's Work, Vol. 50 (Aug. 1926), Garden City, N. Y., pp. 423-428, ill.

- See Bootleggers: Ups and downs of the flying bootleggers.

Mississippi River. See Mattison, G. C.: Aerial survey of the Mississippi River delta.

Mitchell, William. Aeronautical era.

Saturday Evening Post, Vol. 197 (Dec. 20, 1924), Philadelphia, pp. 3-4, ill.

- Aircraft dominate seacraft.

Saturday Evening Post, Vol. 197 (Jan. 24, 1925), Philadelphia, pp. 22-23, ill.

- American leadership in aeronautics.

Saturday Evening Post, Vol. 197 (Jan. 10, 1925), Philadelphia, pp. 18-19, ill.

- Civil and commercial aviation.

Saturday Evening Post, Vol. 197 (Feh. 7, 1925), Philadelphia, p. 14, ill.

- Col. Mitchell's statements on Govt, aviation.

Aviation, Vol. 19, No. 11 (Sept. 14, 1925), New York, pp. 318-329.

- General Mitchell drops some bombs.

Literary Digest, Vol. 84, No. 8 (Feh. 21, 1925), New York, pp. 5-7, port., ill.

- General Mitchell explains.

Independent, Vol. 114 (Apr. 4, 1925), New York, p. 391.

- General Mitchell's parting address.

National Aeronautic Association Review, Vol. 3, No. 6 (June 1925), Washington, D. C, pp. 84, 87.

- How should we organize our national air power?

Saturday Evening Post, Vol. 197 (Mar. 14, 1925), Philadelphia, pp. 6-7, ill

- Mitchell down but not out.

Literary Digest, Vol. 84 (Mar. 21, 1925), New York, pp. 13-14.

- The Mitchell plane.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, pp. 502-503.

- The MitcheU trial.

Aviation, Vol. 19, Nos. 21-23, 26 (Nov. 23-Dec. 7, Dee. 28, 1925), New York, pp. 744-750, 770-772, 802-803, 910, ill.

- Neither armies nor navies can exist unless the air is controlled over them.

TJ. S. Air Services, Vol. 10, No. 5 (May 1925), Washington, pp. 15-18, ill.

- On American air agitation.

The Aeroplane, Vol. 29, No. 15 (Oct. 7, 1925), London, pp. 413-122, ill.

- The Virginia Capes bombing test. Speech delivered by General William

Mitchell. (McCood Field auditorium).

Slipstream, Vol. 6, No. 2 (Feb. 1925), Dayton, Ohio, pp. 26-29, ill.

- Winged defence. The development and possibilities of modern air power—•

economic and military. '

New York, Q. P. Putnams Sons, 1925, pp. xxiv, 261, ill.

- See Army and Navy: Air controversy in the U. S. A.

- See Army and Navy: The airplane-battleship rumpus.

- See Army and Navy: The Army, the Navy, and the airplane.

- See National Air Races: National air races at Mitchell Field.

- See Ranney, H. F.: Colonel William Mitchell on trial.

- See United States: America's drooping wings.

Mittelholzer, Walter. By airplane toward the North Pole; an account of an expedition to Spitzbergen in the summer of 1923. Translated from the German by Eden and Cedar Paul.

London, Boston, George Allen and Unwin, Houghton, Mifflin & Co., 1925, pp. 6-175, ill.

Mittelholzer, Walter. Plying to Persia.

Living Age, Vol. 326 (Apr. 25-May 16, 1925), Boston, pp. 198-203, 242-247, 316-320, 371-377.

- Im Flugzeug dem Nordpol entgegen.

Zürich, Orell Fussli.

Model experiments. See Taylor, David Watson: Model experiments in aerodynamics.

- See Taylor, David Watson : Some aspects of the comparison of model and

full-scale tests.

Models. Society of Model Aeronautical Engineers. Report on research competition.

Flight, Vol. 17, No. 2 (Jan. 8, 1925), London, p. 22.

--See Bodenlos, William E. : How to build a model airplane.

MOELLENnorff, Herman v. WiLAMOWiTz. Luftpolitische Monatsschau.

Aut. Mot. Flugw., 7. Jahrg., Nr. 21, 24 (15. Nov. 31. Dez. 1925), Berlin, pp. 689-591, 691-692.

- See Poeschel,- Johannes: Einführung in die Luftfahrt . . .

Moffett, William A. Admiral Moffett reappointed.

Aviation, Vol. 18, No. 12 (Mar. 23, 1925), New York, p. 325, ill.

- Admiral Moffett replies to accusations.

Aviation, Vol. 19, No. 12 (Sept. 21, 1925), New York, p. 353.

--Admiral Moffett's annual report.

Aviation, Vol. 19, No. 26 (Dec. 21, 1925), New York, pp. 870-871, ill.

--Aviation at sea.

Aero Digest, Vol. 6, No. 5 (May, 1926), New York, pp. 239-241, 280, ill.

- Motor trucks with wings.

Aero Digest, Vol. 6, No. 3 (Mar. 1925), New York, pp. 137, 172, ill.

- See United States: America's drooping wings.

Mohorovicié, S. Hydrodynamische Grundgleichungen für die turbulente Bewegung und ihre Anwendung bei der Bewegung in Kreisrohr. Zeitschrift für technische Physik, Vol. 6, No. 2,1925, Leipsic, pp. 68-74, ill.

Molfese, Manlio. L'aviazione da ricognizione italiana durante la guerra europea; maggio 1915-novembre 1918 con appendice (Commissariato d'aeronautica).

Borna, Provveditorato generale dello Stato, libreria (stah. poligr. Ammlnistrazione Stato), 1925, pp. v, 157.

Monge. Le nouveau petit monoplan bimoteur de Monge.

L'Aêrotechnique (L'Aéronautique 7mo année, No. 69), 3me année, Num. 26 (fév. 1925), Paris, p. 53, ill.

Monoplane. Accidents. Accident to a monoplane.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 1, London, 1925, pp. 40-41.

Monoplane wing. See Glauert, H.: Calculation of the rotary derivatives due to yawing for a monoplane wing.

Monoplanes. Luxury flying in a metal monoplane.

Literary Digest, Vol. 86 (Sept, 26,1925), New York, pp. 60-62, ill,

- The revival of the racing monoplane.

The Aeroplane, Vol. 29, No. 22 (Nov. 25,1925), London, pp. 626, 628, ill.

Mont Afrique. See Lighthouses: De vuurtoren op den Mont Afrique.

Montgolfier. See Compton: Balloon. Flying gas bags from Montgolfier to Zeppelin.

Montjotj, Gut de. Le rapport de M. Guy de Montjou sur l'aéronautique maritime.

L'Aérophile, 33e année, Nos. 11-12 (ler-15 juin 1926), Paris, p. 186. Moore, R. H. Helium. A research narrative.

Slipstream, Vol. 6, No. 1 (Jan. 1925), Dayton, Ohio, p. 36.

Moore, S. T. Aviation cycle.

Independent, Vol. 114 (Feb. 21, 1925), New York, pp. 203-205. ,

- Eagle or ostrich, which?

Independent, Vol. 114 (Feb. 14,Ï925), New York, pp. 177-178.

- Fords look to the air.

Indépendant, Vol. 115 (July 18, 1925), New York, pp. 67-69, ill.

- Lesson of the Shenandoah.

Independent, Vol. 115 (Oct. 24,1925), New York, pp. 465-467. .

- War dogs in the manger.

Independent, Vol. 114 (Feb. 7, 1925), New York, pp. 146-148.

Moore, Walter M. Flying wood. ,

Aero Digest, Vol. 6, No. 2 (Feb. 1925), New York, pp. 97-99.

Mooring. See Giacomelli, R.: Esperimenti d' atterraggio di dirigibili con mezzi propri.

- See Nobile, Umberto: Sistema "Nobile" per atterramento ed ammaramento meccainco di aeronavi.

Mooring mast. The Ford mooring mast.

Aviation, Vol. 19, No. 1 (July 6, 1925), New York, p. 8.

Morane-Saulnier. L'avion d'entraînement Morane-Saulnier, type 51 Et2.

L'Aérophile, 33e année, Nos. 17-18 (ler-15 sept. 1925), Paris, pp. 282-283, ill.

Morecraft, J. H. Radio and the world flight.

Eadio Broadcast, Vol. 6 (Dec. 1924), New York,pp. 258-259.

Morehouse. The Morehouse light plane engine. A horizontally opposed twin of American origin.

Flight, Vol. 17, No. 27 (July 2, 1925), London, pp. 400-401, ill., diagr.

- See Wright Aeronautical Corp.: Wright Aeronautical Corp. to manufacture the Morehouse engine.

Morehouse, Harold E. The Morehouse light plane engine.

Aviation, Vol. 18, No. 22 (June 1, 1925), New York, pp. 602-603, ill., diagr.

Morocco. L'aviation sanitaire au Maroc.

L'Aérophile, 33e année, Nos. 3-4 (ler-15 fév. 1925), Paris, pp. 35-37, ill.

- See Borner, F. : Air fighting in Morocco.

- See Mézerques: L'aviation française au Maroc.

Morris, Joseph. The German air raids on Great Britain, 1914-1918.

London and Toronto, Sampson, Low, Marston & Co., Eyerson Press, 1925, pp. xii, 306, ill.

- Vibration in engine test gear.

Engineer, Vol. 139, No. 3618 (May 1, 1925), London, pp. 484-485, ill.

Morse, Alan L. Aeronautics and agriculture. How billions will be saved in forests and crops by unique but highly practical aircraft dusting apparatus. Slipstream, Vol. 6, No. 4 (Apr. 1925), Dayton, Ohio, pp. 6-8, ill.

- New dusting apparatus successful.

Slipstream, Vol. 6, No. 8 (Aug. 1925), Dayton, Ohio, pp. 16-17, ill.

Moses, S. E. Life on the Shenandoah.

Saturday Evening Post, Vol. 197 (Dec. 20,1924), Philadelphia, p. 6, ill.

Moses, S. E. Travel by air.

Sunset, Vol. 55 (Aug. 1925), San Francisco, pp. 20-23, ill.

Mosquitoes. Fighting mosquitoes with airplanes.

Literary Digest, Vol. 85, No. 1 (Apr. 4, 1925), New York, p. 29, ill.

- See King, W. V., and G. H. Bradley: Airplane dusting controls malaria

mosquitoes.

Moss, H., and W. J. Stern. Phase setting of engine indicators.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 2, London, 1925, pp. 609-620, diagrs. Eaports and Memoranda, 878. June 1923. (E. 7.)

Motion. See Obota, Jüichi, and Yahei Yoshida: On the valve method of measuring small motion, with special reference to the precise recording of sounds, pressure variations and vibrations.

Moto-meter. See Boynton, H. B.: The distance type moto-meter.

Moving pictures. Airplanes in moving pictures.

Popular Mechanics, Vol. 43 (Feb. 1925), Chicago, pp. 285-286, ill.

- See Lasky, Jesse L.: The air mail in motion pictures.

--»See United States Air Service, War Department: Catalogue of motion-picture films and lantern slides.

Müller, Horst. »See Everling, E., und Horst Müller: Die technischen " Begriffsbestimmungen."

Müller, W. Die Ermittlung von Auftriebsinvarianten voigegebener Profile.

Zeitschrift, für angewandte Mathematik und Mechanik, Bd. 5, Heft 5 (Okt. 1925), Berlin.

——■ Ueber die Form- und Auftriebsinvarianten für eine besondere Klasse von Flügelprofilen.

Zeitschrift für angewandte Mathematik und Mechanik, Bd. 4, Nr. 5 (Okt. 1924), Berlin, pp. 389-404, ill.

- Wirbelschichten und Zirkulation.

Zeitschrift für technische Physik, Bd. 5, Nr. 10,1924, Berlin, pp. 450-458, ill.

- Zur Konstruktion von Tragflächenprofilen.

Zeitschrift für angewandte Mathematik und Mechanik, Bd. 4, Nr. 3 (June, 1924), Berlin, pp. 213-231, ill.

Müller-Breslau, Heinrich. Die graphische Statik der Baukonstruktionen.

Stuttgart, Verlag Alfred Kröner, 1922, Zweiter Band, i Abt., 5. Aufl., pp. 498, ill.; 1925, ii Abt., 2. Aufl., pp. viii, 720, ill.

Munich. Die Deutsche Verkehrsausstellung.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9. Sept. 1925), München, pp. 319-398, ill.

--The Munich aero show.

Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, pp. 389-390, ill.

--»See Krupp, G.: Deutsche Verkehrsausstellung München: Halle 7a.

—— »See Macholz: Eröffnung der Luftschiffahrtsausstellung auf den Deutschen Verkehrsausstellung München.

- »See Schreve, G. V.: Internationaler Flugwettbewerb München.

Münk, Max Michael. Determination and classification of the aerodynamic properties of wing sections.

National Advisory Committee for Aeronautics, Technical Notes No. 227, Sept. 1925, Washington, pp. 22.

- Model tests on the economy and effectiveness of helicopter propellers.

National Advisory Committee for Aeronautics, Technical Notes No. 221, July 1925, Washington, pp. 26, ill., diagrs., tabls.

Munk, Max Michael, and Elton W. Miller. Model tests with a systematic series of 27 wing sections at full Reynolds number.

National Advisory Committee for Aeronautics, Report No. 221, Dec. 23,1925, Washington, . Government Printing Office, 1926, pp. 18, tabls., diagrs.

Mttnk, Max Michael. Note on the air forces on a wing caused by pitching.

National Advisory Committee for Aeronautics, Technical Notes No. 217, March, 1925, Washington, pp. 6.

-- Preliminary wing model tests in the variable density wind tunnel of the

National Advisory Committee for Aeronautics.

National Advisory Committee for Aeronautics, Report No. 217, Nov. 18,1925, Washington, l Government Printing Office, 1925, pp. 15.

-- The simplifying assumptions, reducing the strict application of classical

hydrodynamics to practical aeronautical computations.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 432-438..

-- The velocity distribution caused by an airplane at the points of a vertical

plane containing the span.

National Advisory Committee for Aeronautics, Technical Notes No. 216, Mar. 1925, Washington, pp. 8.

- See Ames, Joseph Sweetman: A résumé of the advances in theoretical

aeronautics made by Max M. Munk.

Murphy, W. H. The radio beacon.

Slipstream, Vol. 6, No. 11 (Nov. 1925), Dayton, Ohio, pp. 21-23, ill.

Murray', Stella Wolfe. .The poetry of flight. An Anthology. London, Heath Cranton, Ltd., 1925, pp. 144.

Musset, Paul. Le banquet des sociétés affiliées et de la F. A. I. du 18 décembre 1924.

L'Aérophile, 33e année, Nos. 1-2 (ler-15 jan. 1925), Paris, pp. 20-25.

- Les philatélistes au Bourget.

L'Aérophile, 33e année, Nos. 9-10 (ler-15 mai 1925), Paris, p. 149.

N

N. 1. See Verduzio, R.: Sulla possibilità della trasvolata polare del dirigibile "N. 1".

N. 2. The Italian N. 2 semirigid airship.

Flight, Vol. 17, No. 37 (Sept. 10, 1925), London, pp. 577-579, ill.

- The latest Italian airship, the N2.

Aviation, Vol. 19, No. 10 (Sept. 7, 1925), New York, pp. 274-275, ill.

Nacelle. See Verduzio, R.: Calcololo della navicella e degli organi accessori nei dirigibili.

Napier. The makers of Napier engines.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, pp. 586-588, ill.

National Advisory Committee for Aeronautics. Aeronautics. Tenth annual report of the National Advisory Committee for Aeronautics, 1924. Including technical reports Nos. 186 to 209.

Washington, Government Printing Office, 1925, pp. 499, ills., diagrs., tabls.

Technical Reports: No. 186. The application of propeller test data to design and performance calculations, by Walter S. Diehl, pages 67-77. No. 187. Flame speed and spark intensity, by D. W. Randolph and F. B. Silsbee, pages 79-92. No. 188. The influence of the form of a wooden beam on its stiffness and strength, III. Stresses in wood members subjected to combined column and beam action, by J. A. Newlin and G. W. Thayer, pages

93-105. No. 189. Relation of fuel-air ratio to engine performance, by Stanwood W. Sparrow, pages 107-122. No. 190. Correcting horsepower measurements to a standard temperature, by Stanwood W. Sparrow, pages 123-138. No. 191. Elements of the wing section theory and of the wing theory, by Max M. Munk, pages 139-163. No. 192. Charts for graphical estimation of airplane performance, by Walter S. Diehl, pages 165-176. No. 193. Pressure distribution over the wings of an MB-3 airplane in

, flight, by F. H. Norton, pages 177-195. No. 194. Investigation of slipstream velocity, by J. W. Crowley, jr., pages 197-203. No. 195. Standardisation tests of N. A. C. A. No. 1 wind tunnel, by Elliott G. Reid, pages 205-233. No. 196. Comparison of model propeller tests with airfoil theory, by William F. Durand and E. P. Lesley, pages 235-260. No. 197. A new relation between the induced yawing moment and the rolling moment of • an airfoil in straight motion, by Max M. Munk, pages 261-267. No. 198. Astronomical methods in aerial navigation, by K. Hilding Beij, pages 269-320. .No. 199. Interference tests on an N. A. C. A. Pitot tube, by Elliott G. Reid, pages 321-328. No. 200. Some problems on the lift and rolling moment of airplane wings, by James B. Scarborough, pages 329-344. No. 201. The effects of shielding the tips of airfoils, by Elliott G. Reid, pages 345-353. No. 202. The sparking voltage of spark plugs, by F. B. Silsbee, pages 355-370. No. 203. Accelerations in flight, by J. H. Doolittle, pages 371-388. No. 204. Forces on airships in gusts, by C. P. Burgess, pages 389-396. No. 205. The effect of changes in compression ratio upon engine performance, by Stanwood W. Sparrow, pages 397-418. No. 206. Nonmetallic diaphragms for instruments, by H. N. Eaton and C. T. Buckingham, pages 419-462. No. 207. Aerodynamic characteristics of airfoils at

it , high speeds, by L. J. Briggs, G. F. Hull, and H. L. Dryden, pages 463-479. No. 208. Determination of turning characteristics of an airship by means of a camera obscura, by J. W. Crowley, jr., and R. G. Freeman, pages 481-488. No. 209. Characteristics of a single-float seaplane during takeoff, by J. W. Crowley, jr., and K. M. Ronan, pages 489-499.

National Advisory Committee for .Aeronautics. Aeronautics. Eleventh annual report of the National, Advisory Committee for Aeronautics, 1925. Administrative report without technical reports. Washington, Government Printing Oflice, 1925, pp. 59.

- The annual N. A. C. A. report.

Aviation, Vol. 19, No. 25 (Dec. 21, 1925), New York, pp. 873-874, ill.

- Bibliography of aeronautics 1920-1921, by Paul Brockett.

National Advisory Committee for Aeronautics, Washington, Government Printing Office, .,. . 1925, pp. 448.

- Bibliography of aeronautics 1922, by Paul Brockett.

National Advisory Committee for Aeronautics, Washington, Government Printing Office, 1925, pp. 167.

—— Eminent aeronautical technicians, in their tenth annual meeting, study model of the airship carrier Saratoga.

Aero Digest, Vol. 6, No. 6 (June 1925), New York, p. 328, ill.

- Report No. 195. Standardization tests of N. A. C. A. No. 1 wind tunnel,

, by Elliott G. Reid.

National Advisory Committee for Aeronautics, Feb. 7, 1925, Washington, Government ■ Printing Office, 1924, pp. 31, ill., diagrs., tabls.

—— ' Report No. 199. Interference tests on an N. A. C. A. Pitot tube, by Elliott G. Reid.

National Advisory Committee for Aeronautics, Mar. '6, 1926, Washington, Government Printing Office, 1925, pp. 8, ill.

National Advisory Committee for Aeronautics. Report No. 200. Some problems on the lift and rolling moment of airplane wings, by James B. Scarborough.

National Advisory Committee for Aeronautics, May 16,1926, Washington, Government Printing Office, 1926, pp. 16, ill.

- Report No. 201. The effects of shielding the tips of airfoils, by Elliott

G. Reid.

National Advisory Committee for Aeronautics, May 9, 1926, Washington, Government Printing Office, 1925, pp. 9, 111., diagrs., tabls.

- Report No. 202. The sparking voltage of spark plugs, by F. B. Silsbee.

National Advisory Committee for Aeronautics, Feb. 17, 1925, Washington, Government Printing Office, 1925, pp. 16, ill.

- Report No. 203. Accelerations in flight, by J. H. Doolittle.

National Advisory Committee for Aeronautics, Feb. 28, 1925, Washington, Government Printing Office, 1925, pp. 18, ill., diagrs.

- Report No. 204. Forces on airships in gusts, by C. P. Burgess.

National Advisory Committee for Aeronautics, Tan. 26, 1925, Washington, Government Printing Office, 1925, pp. 8.

- Report No. 205. The effect of changes in compression ratio upon engine

performance, by Stanwood W. Sparrow.

National Advisory Committee for Aeronautics, Mar. 13, 1925, Washington, Government Printing Office, 1925, pp. 22, diagrs.

- Report No. 206. Nonmetallic diaphragms for instruments, by H. N.

Eaton and C. T. Buckingham. '

National Advisory Committee for Aeronautics, May 2, 1925, Washington, Government Printing Office, 1925, pp. 44, ill., diagrs.,

- Report No. 207. Aerodynamic characteristics of airfoils at high speeds,

by L. J. Briggs, G. F. HuU, and H. L. Dryden.

National Advisory Committee for Aeronautics, Apr. 15, 1925, Washington, Government Printing Office, 1925, pp. 17, ills., diagrs. '

- Report Nó. 208. Determination of turning characteristics of an airship

by means of a camera obscura, by J. W. Crowley, jr., and R. G. Freeman.

National Advisory Committee for Aeronautics, June 5, 1925, Washington, Government Printing Office, 1925, pp. 8, ill.

- Report No. 209. Characteristics of a single-float seaplane during take-off.

National Advisory Committee for Aeronautics, Apr, 24, 1925, Washington, Government Printing Office, 1925, pp. 11, ill., diagrs.

- Report No. 210. Inertia factors of ellipsoids for use in airship design,

by L. B. Tuckerman.

National Advisory Committee for Aeronautics, July 26, 1926, Washington, Government Printing Office, 1925, pp. 7.

- Report No. 211. Water model tests for semirigid airships^ by L. B.

Tuckerman.

National Advisory Committee for Aeronautics, Mar. 20, 1925, Washington, Government Printing Office, 1925, pp. 14.

- Report Nò. 212. Stability equations for airship hulls, by A. F. Zahm.

National Advisory Committee for Aeronautics, June 9, 1926, Washington, 'Government Printing Office, 1926, pp. 6, ill.

- Report No. 213. A résumé of the advances iu theoretical aeronautics

made by Max M. Munk, by Joseph S. Ames.

National Advisory Committee for Aeronautics, Mar. 31, 1925, Washington, Government Printing Office, 1925, pp. 46, ill.

National Ad.visory Committee fob Aebonautics. Report No. 214. Wing spar stress, charts and wing truss proportions, by Edward P. Warner.

National Advisory Committee for Aeronautics, Nov. 2, 1925, Washington, Government Printing Office, 1925, pp. 18, diagrs.

- Report No. 215. Air forces, moments and damping on model of fleet

airship Shenandoah, by A. F. Zahm, R. H. Smith, and F. A. Louden.

National Advisory Committee for Aeronautics, Sept. 23, 1925, Washington, Government Printing Office, 1925, pp. 32, ill., diagrs., tahls.

- Report No. 216. The reduction of airplane flight test data to standard

atmoshpere conditions, by Walter S. Diehl and E. P. Lesley.

National Advisory Committee for Aeronautics, Aug. 1, 1925, Washington, Government Printing Office, 1925, pp. 18, diagrs.

- Report No. 217. Preliminary wing model tests in the variable density

wind tunnel of the National Advisory Committee for Aeronautics, by Max M. Munk.

National Advisory Committee for Aeronautics, Nov. 18, 1925, Washington, Government Printing Office, 1925, pp. 15.

■- Report No. 218. Standard atmosphere—tables and data, by Walter. S.

Diehl. o.

National Advisory Committee for Aeronautics, Oct. 25, 1925, Washington, Government Printing office, 1926, pp. 28, tahls.

- Report No. 221. Model tests with a systematic series of 27 wing sections

at full Reynolds number, by Max M. Munk and Elton W. Miller.

National Advisory Committee for Aeronautics, Dec. 23, 1925, Washington, Government Printing Office, 1926, pp. 18, tahls., diagrs.

- Technical Memorandums No. 295. Hulls for large seaplanes, by Giulio

Magaldi.

National Advisory Committee for Aeronautics, Jan. 1925 (mimeographed), Washington, pp. 20, ill.

From "La Technique Aeronautique," Oct. 15, 1924.

—— Technical Memorandums No. 296. Experimental determination of pressure drop caused by wire gauze in an air stream.

National Advisory Committee for Aeronautics, Jan. 1925 (mimeographed), Washington, pp. 9, tahls.

From Report A 77 of the "Rijks-Studiedienst voor de Luchtvaart," reprinted from "De Ingenieur," Aug. 5, 1924.

- Technical Memorandums No. 297. Royal Aero Club light aeroplane

competition, by J. S. Buchanan.

National Advisory Committee for Aeronautics, Jan. 1925 (mimeographed), Washington, pp. 33, tabls.

Paper read hefore the Royal Aeronautical Society, Oct. 30, 1925.

- Technical Memorandums No. 298. Results of recent experiments with

slotted wings, by G. Lachmann.

National Advisory Committee for Aeronautics, Jan. 1925 (mimeographed), Washington, pp. 15, ill:

From "Zeitschrift fur Flugtechnik und Motorluftschiffahrt," Aug. 26 and Sept. 26, 1924.

- Technical Memorandums No. 299. Determination of ignition points of

liquid fuels under pressure, by J. Tausz and F. Schulte.

National Advisory Committee for Aeronautics, Jan. 1925 (mimeographed), Washington, pp. 14, ill.

From "Zeitschrift des Vereines Deutscher Ingenieure," May 31, 1924.

- Technical Memorandums No. 300. Pressure distribution on fuselage of

airplane model.

National Advisory Committee for Aeronautics, Feh. 1925 (mimeographed), Washington, pp. 15, ill., diagrs., tahls.

From Report A 33 of the " Rijks-Studiedienst voor de Luchtvaart," Amsterdam, reprinted from "De Ingenieur" of Jan. 26, 1924.

National Advisory Committee for Aeronautics. Technical Memorandums No. 301. Light airplanes of France, Germany, Italy, Belgium, Holland, Czechoslovakia, and Lithuania. Compiled by the National Advisory Committee for Aeronautics.

National Advisory Committee for Aeronautics, Feh. 1925 (Nov. 5, 1925) (mimeographed)', Washington, pp. 37, ill.

- Technical Memorandums No. 302. Effect of speed on economy of airship

traffic, by W. Bleistein.

National Advisory Committee for Aeronautics, Feh. 1925 (mimeographed), Washington, pp. 55, diagrs.

From "Zeitschrift für Fiugtechnik und Motoriuftschiflahrt," Oct. 28, Dec. 13 and 27, 1924.

•-- Technical Memorandums No. 303. Pitot-static tubes for determining

the velocity of air, by H. Kumbruch.

National Advisory Committee for Aeronautics, Feh. 1925 (mimeographed), Washington, pp. 51, ill.

From "Forschungsarbeiten auf dem Gehiete des Ingenieurwesens," 1921, No. 240.

- Technical Memorandums No. 304. Suggestions for courses of instruction

in aviation, by Professor Poeschel.

National Advisory Committee for Aeronautics, Mar. 1925 (mimeographed), Washington, pp. 9.

From "Luftfahrt," Dec. 5, 1924.

—— Technical Memorandums No. 305. Calculation of wing spars of variable cross section and linear load, by Léon Kirste.

National Advisory Committee for Aeronautics, Mar. 1925 (mimeographed), Washington, pp. 5, ill. From "L'Aéronautique," Jan. 1925.

- Technical Memorandums No. 306. Altitude of equilibrium of an airship,

by Umberto Nobile.

National Advisory Committee for Aeronautics, Mar. 1925 (mimeographed), Washington, pp. 18, diagrs. From "Eendiconti Tecnici," Nov. 15, 1924.

- Technical Memorandums No. 307. Preliminary investigation of the

effect of a rotating cylinder in a wing, by E. B. Wolff.

National Advisory Committee for Aeronautics, March, 1925 (mimeographed), Washington, pp. 12, ill., tahls.

From Report A 96 of the "Rijkstudiedienst voor de Luchtvaart," Amsterdam, reprinted from "De Ingenieur," No. 49, Dec, 1924.

- Technical Memorandums No. 308. Law of similitude for the surface

resistance of lacquered planes moving in a straight line through water, by Friedrich Gebers.

National Advisory Committee for Aeronautics, April, 1925 (mimeographed), Washington, pp. 75, ill., tahls., diagrs. From "Schiffbau," Vol. 22,1921. Nos. 29, 30, 31, 32, 33, 35, and 37.

- Technical Memorandums No. 309. Light aeroplane engine development,

by L. F. R. Fell.

National Advisory Committee for Aeronautics, April, 1925 (mimeographed), Washington, pp. 24, tabls.

Paper read at a Joint meeting of the Royal Aeronautical Society and of the Institution of Automobile Engineers, Feh. 19, 1925.

- Technical Memorandums No. 310. The "Magnus effect," the principle

of the Flettner Rotor, by A. Betz.

National Advisory Committee for Aeronautics, April, 1925 (mimeographed), Washington, pp. 23, ills., diagrs. From "Zeitschrift des Vereines deutscher Ingenieure," Jan. 3, 1925.

National Advisory Committee for Aeronautics. Technical Memorandums No. 311. The light airplane. Brief review of the results obtained in the development of light airplanes—I. Modern theoretical aerodynamics as applied to light airplane design—II, by Ivan H. Driggs.

National Advisory Committee for Aeronautics, April, 1925 (mimeographed), Washington, pp. 30, tahls.

Reprinted from "The Slipstream Monthly," Dec, 1924, and Jan., 1925.

- Technical Memorandums No. 313. Structural methods employed by

the Schiitte-Lanz Airship Company, by Chief Engineer Gentzcke of the S-L Airship Company.

National Advisory Committee for Aeronautics, May, 1925 (mimeographed), Washington, pp. 71, ill.

From "Zeitschrift für Flugtechnik und Motorluftschiffahrt," May 15, 1924.

- Technical Memorandums No. 314. Alloys similar to duralumin made

in other countries than Germany, by K. L. Meissner.

National Advisory Committee for Aeronautics, May, 1925 (mimeographed), Washington, pp. 7.

From "Zeitschrift für Metallkunde," 1925.

- Technical Memorandums No. 315. The problem of fuel measurement

(The Schiste "Konsummeter"),* by K. R. H. Praetorius.

National Advisory Committee for Aeronautics, Mey, 1925 (mimeographed), Washington, pp. 4, ill.

From " Der Motorwagen," March 31, 1925.

- Technical Memorandums No. 316. European commercial aeronautics.

Prepared for United States Army Air Service from data obtained during his inspection trip, July-September, 1924, by Lieut. J. Parker Van Zandt.

National Advisory Committee for Aeronautics, May, 1B25 (mimeographed), Washington, pp. 14, map.

- Technical Memorandums No. 317. Air forces on airfoils moving faster

than sound, by J. Ackeret.

National Advisory Committee for Aeronautics, June, 1925 (mimeographed), Washington, pp. 8, ill.

From "Zeitschrift für Flugtechnik und Motorluftschiflahrt," Feb. 14,1925.

- Technical Memorandums No. 318. High velocity wind tunnels (their

application to ballistics, aerodynamics, and aeronautics), by E. Huguenard.

National Advisory Committee for Aeronautics, June, 1925 (mimeographed), Washington, pp. 29, ill.

From "La Technique Aéronautique," Nos. 37-38, Nov. 15 and Dec. 15,1924.

- Technical Memorandums No. 319. Report on commercial air transportation activities in England, Prance, Germany, and Holland. Prepared for United States Army Air Service, by Lieut. J. Parker Van Zandt.

National Advisory Committee for Aeronautics, June, 1925 (Sept. 28, 1925) (mimeographed), Washington, pp. 70, ills., tabls., map.

- Technical Memorandums No. 320. The " Navigraph," by Ives Le Prieur.

National Advisory Committee for Aeronautics, June, 1925 (mimeographed), Washington, pp. 10, ill. From "L'Illustration," April 4, 1925.

- Technical Memorandums No. 321. Increasing the power of internal

combustion engines, by Georg Prayer. *

National Advisory Committee for Aeronautics, July, 1925 (mimeographed), Washington, pp. 11, ills. From "Der Motorwagen," Sept. 30, 1924.

National Advisory Committee for Aeronautics. Technical Memorandums No. 322. Airplane parachutes, by Lieutenant Mazer.

National Advisory Committee for Aeronautics, Aug., 1925 (mimeographed), Washington, pp. 47, 111.

From "Bulletin Technique," Aug., 1924, of the Service Technlqua da l'Aéronautique, Franca.

- Technical Memorandums No. 323. Recent experiments at the Göttingen

aerodynamic institute, by J. Ackeret.

National Advisory Committee for Aeronautics, July, 1925 (mimeographed), Washington, pp. 21, ills.

From "Zaitschrift für Flugtechnik und Motoriuftschiflahrt," Feb. 14,1925.

- Technical Memorandums No. 324. Relation of "Lilienthal effect" to

dynamic soaring üight, by Roderich Fick.

National Advisory Committee for Aeronautics, July, 1925 (mimeographed), Washington, pp. 14, ill.

From "Zaitschrift für Fingtechnik und Motoriuftschiflahrt," 1924, Nov. 28 and Dec. 12.

- Technical Memorandums No. 325. Computation of cantilever airplane

wings, by K. Thalau.

National Advisory Committee for Aeronautics, July, 1925 (mimaographad), Washington, pp. 21, ill.

From "Zaitschrift für Flugtechnik und Motorluftschiffahrt," May 26, 1924.

- Technical Memorandums No. 326. The light airplane. Modern theoretical areodynamics as applied to light airplane design, with a series of ■charts—III. Design of an airplane with reference to physical dimensions, component weights, and disposition of surfaces—IV. Design of an airplane with reference to balance, distribution of weights and moments—V, by Ivan H. Driggs.

National Advisory Committee for Aeronautics, Tachnical Memorandums No. 326, Aug., 1925, Washington, pp. 34, ill., tabls. Baprinted from "The Slipstream Monthly," February, April, and July, 1925.

- Technical Memorandums No. 327. Latécoère air lines, by Lieut. J.

Parker Van Zandt.

National Advisory Committee for Aaronautics, August, 1925 (mimeographed), Washington, pp. 17, ill.

Prepared for tha U. S. Army Air Service.

- Technical Memorandums No. 328. Preliminary report on British commercial aeronautics. Prepared for United States Army Air Service by Lieut. J. Parker Van Zandt, July 8, 1924.

National Advisory Committee for Aeronautics, Sept., 1925 (mimeographed), Washington, pp. 11. (Mailed Sept. 9,1925.)

- Technical Memorandums No. 329. Atomization of liquid fuels, by Dr.

Kuehn. Part I. Relation between atomization and combustion. Methods employed for determining the size of particles and small drops. Choice of experimental method.

National Advisory Committee for Aeronautics, Sapt., 1925 (mimaographad), Washington, pp.31. (MauedSept.il, 1925.) From "Dar Motorwagan," July 10 and 20, 1924.

- Technical Memorandums No. 330. Atomization of liquid fuels, by Dr.

R. Kuehn. Part II. Description of apparatus. Fuels tested. Atomization experiments. Discharge measurements atomization.

National Advisory Committea for Aaronautics, Sapt., 1925 (mimeographed), Washington, pp. 50, ill. Mailad Sapt. 21, 1925. From "Der Motorwagan," Oct. 10 and 20, and Nov. 30, 1924.

National Advisory Committee for Aeronautics. Technical Memorandums No. 331. Atomization of liquid fuels, by Dr. R. Kuehn. Part III. Critical discussion of experimental results mixing the atomized fuel with air.

National Advisory Committee for Aeronautics, Sept., 1925 (mimeographed), Washington, pp. 48, diagrs. Mailed Sept. 28, 1925. From "Der Motorwagen," Dec. 10,1924, Jan. 20, and Feb. 10,1925.

- Technical Memorandums No. 332. Concrete airship sheds at Orly,

France, by Freyssinet. Part I. General aspect of the problem. Basic principles of the final project. Principal structural elements.

National Advisory Committee for Aeronautics, Oct., 1925 (mimeographed), Washington, pp. 40, ills. Mailed Oct. 6, 1925. From "Le Génie Civil," Sept. 22 and 29,1923.

- Technical Memorandums No. 333. Concrete airship sheds at Orly,

France, by Freyssinet. Part II. Supporting structure and method of moving. Mechanism for moving the centering apparatus for handling the materials. Remarks on construction details.

National Advisory Committee for Aeronautics, Oct. 1925 (mimeographed), Washington, pp. 39, ills. Mailed Oct. 8, 1925. From "Le Gerne Civil," Sept. 29 and Oct. 6, 1923.

- Technical Memorandums No. 334. Theory of flapping flight, by Alexander Lippisch.

National Advisory Committee for Aeronautics, Oct. 1925 (mimeographed), Washington, pp. 11, ill. Mailed Oct. 15, 1925. From "Flugsport," June 17, 1925.

- Technical Memorandums No. 335. Schiitte-Lanz airship projects after

the war, by Georg Weiss.

National Advisory Committee for Aeronautics, Oct. 1925 (mimeographed), Weshington, pp. 14, ill. Mailed Oct. 24, 1925. From "Schiffbau," May 27, 1925.

- Technical Memorandums No. 336. Pressure distribution on Joukowski

wings, by Otto Blumenthal, and Graphic construction of Joukowski wings, by E. Trefftz.

National Advisory Committee for Aeronautics, Oct. J925 (mimeographed), Washington, pp. 20, ill. Mailed Oct. 31, 1925. From " Zeitschrift für Flugtechnik und Motorluftschifiabrt," May 31,1913.

- Technical Memorandums No. 337. A method for the direct determination of wing-section drag, by A. Betz.

National Advisory Committee for Aeronautics, Nov. 1925 (mimeographed), Washington, pp. 8, ill. Mailed Nov. 5, 1925. From "Zeitschrift für Flugtechnik und Motorluftscbjffahrt," Feb. 14, 1925.

- Technical Memorandums No. 338. Recent progress in the theoretical

deduction of airplane wings, by M. Panetti.

National Advisory Committee for Aeronautics, Nov. 1925 (mimeographed), Washington, pp. 10. Mailed Nov. 19,1925. From "Eevista Aeronautica," July 1925.

- Technical Memorandums No. 339. Aerodynamic characteristics of aircraft with reference to their use, by M. Panetti.

National Advisory Committee for Aeronautics, 1925 (mimeographed), Washington, pp. 12. Mailed Nov. 25, 1925. From "L'Ala d'ltalia," April 1925.

- Technical Memorandums No. 340. An introduction to the helicopter, by

Alexander Klemin.

National Advisory Committee for Aeronautics, 1925 (mimeographed), Washington, pp. 57, ill. Mailed Dec. 4,1925. From " Mechanical Engineering," Mid-November 1924.

National Advisory Committee for Aeronautics. Technical Memorandums No. 341. Strength calculations on airplanes, by A. Baumann.

National Advisory Committee for Aeronautics, Dec. 1925 (mimeographed), Washington, pp. 23. Mailed Dec. 10, 1925.

From "Berichte und Abhandlungen der Wissenschaftllchen Gesellschaft fur Luftfahrt," July 1925.

- Technical Memorandums No. 342. Wire suspensions in wind-tunnel

experiments, by Jean Kerneis.

National Advisory Committee for Aeronautics, Dec. 1925 (mimeographed), Washington, pp. 14, ill. Mailed Dec. 17, 1925. From "L'Aerophile," Sept. 1-15, 1925.

- Technical Memorandums No. 343. Potential flow in engine valves, by

Bruno Eck.

National Advisory Committee for Aeronautics, Dec. 1925 (mimeographed), Washington, pp. 20, ill. Mailed Dec. 24,1925. Eeprint from "Zeitschrift fur angewante Mathematik und Mechanik," Vol. IV, 1924.

- Technical Notes No. 211. Aircraft engine design, by E. E. Wilson.

National Advisory Committee for Aeronautics, Jan. 1925 (mimeographed), Washington, pp. 20, ills., diagr.

- Technical Notes No. 212. Simplified propeller design for low-powered

airplanes, by Fred E. Weick.

National Advisory Committee for Aeronautics, Jan. 1925 (mimeographed), Washington pp. 10, ills., diagrs.

- Technical Notes No. 213. Discharge characteristics of a high speed fuel

injection system, by Robertson Matthews.

National Advisory Committee for Aeronautics, Feh. 1925 (mimeographed), Washington, pp. 21, ills., diagrs.

- Technical Notes No. 214. Note on the Katzmayr effect on airfoil drag,

by Shatswell Ober.

National Advisory Committee tor Aeronautics, Feb. 1925 (mimeographed), Washington, pp. 11, ill., diagr., tabls.

- Technical Notes No. 215. The calculation of wing float displacement in

single-float seaplanes, by Edward P. Warner.

National Advisory Committee for Aeronautics, March 1925 (mimeographed), Washington, pp. 5, diegr.

- Technical Notes No. 216. The velocity distribution caused by an airplane at the points of a vertical plane containing the span, by Max. M. Munk.

National Advisory Committee for Aeronautics, March 1925 (mimeographed), Washington, pp.8.

- Technical Notes No. 217. Note on the air forces on a wing caused by

pitching, by Max M. Munk.

Notional Advisory Committee for Aeronautics, March 1925 (mimeographed), Washington, pp. 6.

- Technical Notes No. 218. The estimation of airplane performance from

wind tunnel tests on conventional airplane models, by Edward P. Warner and Shatswell Ober.

National Advisory Committee for Aeronautics, May 1925 (mimeographed), Washington, pp. 18.

- Technical Notes No. 219. The comparison of well-known and new wing

sections tested in the variable density wind tunnel, by George J. Higgins.

National Advisory Committee for Aeronautics, May 1925 (mimeographed), Washington, pp. 13, tabls., diagrs.

National Advisory Committee foe Aeronautics. Technical Notes No. 220. The drift of an aircraft guided toward its destination by directional receiving of radio signals transmitted from the ground, by Edward P. Warner.

National Advisory Committee for Aeronautics, June 1925 (mimeographed), Washington, pp. 5, diagrs.

- Technical Notes No. 221. Model tests on the economy and effectiveness

of helicopter propellers, by Max M. Münk.

National Advisory Committee for Aeronautics, July 1925 (mimeographed), Washington, pp. 26, ill., diagr., tahls.

- Technical Notes No. 222. Air flow investigation for location of angle of

attack head on JN4h airplane, by R. G. Freeman.

National Advisory Committee for Aeronautics, August 1925 (mimeographed), Washington, pp. 13, ill.

- Technical Notes No. 223. Determination of the lift and drag characteristics of an airplane in flight, by Maurice W. Green.

National Advisory Committee for Aeronautics, August 1925 (August 25, 1925) (mimeographed), Washington, pp. 16, ill.

- Technical Notes No. 224. Pressure distribution on the nose of an airship in circling flight, by Karl J. Fairbanks.

National Advisory Committee for Aeronautics, August 1925 (mimeographed), Washington, pp. 4, ill.

- Technical Notes No. 225. Propeller scale effect and body interference,

by Fred E. Weicht.

National Advisory Committee for Aeronautics, Sept. 1925 (Sept. 3, 1925) (mimeographed). Washington, pp. 7, diagrs.

- Technical Notes No. 226. Wind tunnel tests of fuselages and windshields, by Edward P. Warner.

National Advisory Committee for Aeronautics, Sept. 1925 (Sept. 22,1925) (mimeographed), Washington, pp. 6, ill.

■—— Technical Notes No. 227. Determination and classification of the aerodynamic properties of wing sections, by Max M. Münk.

National Advisory Committee for Aeronautics, Sept. 1925 (Sept. 28, 1925) (mimeographed), Washington, pp. 22.

- Technical Notes No. 228. The Flettner rotor ship in the light of the

Kutta-Joukowski theory and of experimental results, by Frank Rizzo.

National Advisory Committee for Aeronautics, Oct. 1925 (Oct. 28, 1925), Washington, pp. 22, III.

- Technical Notes No. 229. An altitude chamber for the study and calibration of aeronautical instruments, by H. J. E. Reid and Otto E. Kirchner.

National Advisory Committee for Aeronautics, Nov. 1925 (Nov. 10, 1925) (mimeographed), Washington, pp. 13, ill., diagrs.

- See Langley Field: Oil engine research at Langley Field.

- See Walcott, Charles Doolittle: The National Advisory Committee.

—- See Weyl, Alfred Richard: Uber neuere amerikanische Beschleunigungsmessungen.

National Aeronautic Association. International air races. Report of contest committee, 1924.

Dayton, National Aeronautic Association.

- The N. A. A. National air policy.

Aviation, Vol. 18, No. 13 (Mar. 30,1925), New York.pp. 344-345.

- Program of N. A. A.

Aviation, Vol. 18, No. 23 (June 8, 1925), New York, pp. 640-641.

National Aeronautic Association. See Langley, Samuel Pierpont: National Aeronautic Association would relabel Langley machine.

National Air Races. National air races at Mitchell Field.

U. S. Air Services, Vol. 10, No. 9 (Sept. 1925), Washington, pp. 45-46.

- Regulations for the national air races to be held at Mitchell Field, L. I.,

Oct. 8, 9, 10.

Aviation, Vol. 19, No. 7 (Aug. 17, 1925), New York, pp. 179-182.

- See Shaw, B. Russell: The national air races.

National Air Transport. National Air Transport incorporated.

U. S. Air Services, Vol. 10, No. 8 (Aug. 1925), Washington, pp. 15-18.

- National Air Transport organized.

Aviation, Vol. 18, No. 22 (June 1, 1925), New York, pp. 598-600, ill.

National Physical Laboratory. See International Trials: Report on aerofoil tests at National Physical Laboratory and Royal Aircraft Establishment.

- See Lavender, T.: The "Duplex" wind tunnel of the National Physical

Laboratory.

- See Simmons; L. F. G., and E. Ower: Elimination of the static pressure

gradient along wind tunnels of the N. P. L. type.

- See Southwell, R. V. : Some recent work of the aerodynamics department,

National Physical Laboratory.

Naval Academy. Aeronautics made a major subject at United States Naval Academy.

V. S. Air Services, Vol. 10, No. 6 (June 1925), Washington, pp. 12-16, ill.

Naval aeronautics. Development in naval aeronautics.

Journ. Soc. Automotive Engineers, Vol. 16, No. 3 (Mar. 1925), New York, pp. 361-368.

- See Warlick, William Walter: Naval aviation; a text book for the

instruction of midshipmen in the department of seamanship, United States Naval Academy.

Naval Aircraft Factory. See Engines: The aeronautical engine laboratory, Naval Aircraft Factory, Philadelphia.

- See Zeigler, S. J., jr. : The Naval Aircraft Factory.

Naval Board. The special Naval board's report.

Aviation, Vol. 18. No. 9 (Mar. 2, 1925). New York, pp. 238-240. Naval warfare. See Ballou,' S.: Limitations of aircraft in naval warfare. Navigation. Practical navigation of aircraft.

Flight, Vol. 17, No. 13 (Mar. 26, 1925). London, p. 192.

- See Brion: L'Estimographe Brion.

- See Constant, P.: Cours d'astronomie et de navigation à l'usage des

marins.

- See Cornet, C. : Cosmographie et navigation.

- See Galante, Nicolô: Sulla determinazione délia posizione geografica

dell' aeromobile.

- See Le Prieur, Y.: La consécration d'une méthode de navigation. De

Paris à Gao avec la mission de Goys.

- See Schmauss, S., und P. Zistler: Die Deutsche Verkehrsausstellung.

Raum 4. Navigation.

- See Tymms, F. : Practical navigation of aircraft.

Navigraph. See Le Prieur, Ives: The " Navigraph."

Navy. See Army and Navy: The airplane-battleship rumpus.

- See Army and Navy: The Army, the Navy, and the airplane.

Navy-MacMillan. Navy-MacMillan schedule.

Aviation. Vol. 19, No. 5 (Aug. 3, 1925), New York, pp. 122-123, III.

Nell, Chr. A. C. Doopfeest van den ballon Hollandia.

Het Vliegveld, 9de Jaarg., No. 11 (Nov. 1925), Amsterdam, pp. 290-294, ill.

Neeo. See Prance: Neues aus Frankreich.

Neville, R. T. Amateur aerial photography.

Photo-Era, Vol. 55 (Dec. 1925), Wolfeboro, N. H., pp. 314-319, ill.

New, Harry S. The United States air mail.

National Aeronautic Association Review, Vol. 3, No. 8 (Aug. 1925), Washington, D. C, pp. 115-116.

New York. Aftermaths of the New York air races.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, pp. 592-593.

- The events of the New York air races.

Aviation, Vol. 19, No. 16 (Oct. 19, 1925), New York. pp. 533-544, ill.

- New York air race results.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, pp. 692-595, 630, ill.

- The New York air races.

The Aeroplane, Vol. 29, No. 19 (Nov. 4, 1925), London, pp. 538, 540. Aviation, Vol. 19, No. 14 (Oct. 5, 1925), New York, pp. 426-432, ill.

- The New York 1925 air races.

Aero Digest, Vol. 7, No. 4 (Oct. 1925), New York, pp. 530-532, 564. ■

- New York out for a huge airport.

Literary Digest, Vol. 84, No. 11 (March 14, 1925), New York, pp. 66-69, ill.

- See Fairchild, Sherman M. : Gotham lies below.

- See Pulitzer: The New York air meet. Details of the Pulitzer race.

New York University. N. Y. U. aero course endowed.

Aviation, Vol. 18, No. 25 (June 22,1925), New York, p. 692.

- New York University School of Aeronautics.

School and Society, Vol 22 (Oct. 10,1925), Garrison, N. Y, p. 461.

New Zealand. Aviation in New Zealand.

The Aeroplane, Vol. 29, No. 4 (July 22,1925), London, pp. 116,118.

Nicholas, A. J. Photographing an air jet.

Power, Vol. 61, No. 16 (Apr. 21, 1925), New York, pp. 603-604, ill.

Nicolô. Nota sul calcolo delle centine reticolari.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 7 (15 Agosto 1925), Roma, pp. 6-7, 111.

Niemann. Eine neue Erfindung für das Flugwesen.

Aut. Mot. Plug., 7. Jahrg., Nr. 23 (15. Dez. 1926), Berlin, p. 664.

Niemann, Franz. Rund um den Deutschen Rundflug 1925.

Aut. Mot. Flug., 7. Jahrg., Nr. 11,12 (15.30. Juni 1925), Berlin, pp. 298-300, 326-327, ill.

NiEPCE. See Clerget, P. : Nouvelles recherches sur les origines du moteur à combustion: Le moteur des Frères Niepce (1806).

Niessel, A. Le personnel de l'aviation militaire.

L'Aérophile, 33e année, Nos. 19-20 (ler-16 oct. 1925), Paris, pp. 293-296, port.

Nietjport. See York, J. O. : What engineering has done for an old model.

Night airway. See Bassett, P. R. : The night airway.

Night flying. See Luria, A.: Light projection apparatus for assisting night flying.

- See Osborn, Earl D. : Preparing the night airway.

Night lighting. See Lights.

Night mail. See Mail.

Night observation airplanes. Bid for night observation airplane. Aviation, Vol. 18, No. 14 (Apr. 6, 1925), New York, pp. 383.

Niles, Alfred S., Jr. Load factors for airplane wings.

U. S. Air Services, Vol. 10, Nos. 3-4 (Mar-Apr. 1925), Washington, pp. 23-27, 36-43. Reviewed in: L'Aérotecbnlque (L'Aéronautique, 7me année, No. 76), 3ma année. Num. 33 (sept. 1925), Paris, pp. 343-346.

1924. L'activité aéronautique en 1924.

L'Aérophile, 33e année, Nos. 3-4 (lar-15 fév. 1925), Paris, pp. 53-55, ill.

- Aviation in 1924.

Flight, Vol. 17, no. 1 (Jan. 1, 1925), London, pp. 9-10.

- Lessons of 1924.

Flight, Vol. 17, No. 20 (May 14, 1925), London, p. 296.

- De luchtvaart in 1924.

Hat VTiegveld, 9de Jaarg., No. 1 (Jan. 1925), Amsterdam, pp. 3-4.

- 1924-1925.

Aut. Mot. Flugw., 7. Jahrg., Nr. 1 (16. Jan. 1925), Berlin, p. 20.

- Some lessons from 1924.

The Aeroplane, Vol. 28, No. 19 (May 13, 1925), London, pp. 462-466, ill.

- See Besançon, Georges: L'année aéronautique 1924.

- See S. H.: L'Aviation française en 1924.

1925. L'activité aéronautique de 1925.

L'Aérophile, 33e annéa, Nos. 7-8 (ler-15 avril 1925), Paris, pp. 119-120, ill.

- Les grandes épreuves d'aviation en 1925.

L'Aéronautique, 7ma. annéa, No. 71 (avril 1925), Paris, pp. 121-122.

1926. Le concours d'avions commerciaux de 1926.

VAérophila, 33a année, Nos. 23-24 (ler-15 déc. 1925), Paris, p. 367.

Nistri, A. Note di aerofotogrammetria (Risultati ottenuti nei lavori di rilevamento eseguiti col fotocartografo Nistri).

L'Aerotecnica, Vol. 5, N. 3 (Maggio-Giugno 1925), Pisa, pp. 172-181, ill.

Nixon, H. L. See Batson, A. S., and H. L. Nixon: Pressure distribution over the wings of a model B. E. 2C biplane with raked wing tips.

- See Fage, A., and H. L. Nixon: The prediction on the Prandtl theory of

the lift and drag for infinite span from measurements on aerofoils of finite span.

Nobile. The "Nobile" mechanical landing system.

Aviation, Vol. 19, No. 3 (July 20, 1925), New York, pp. 63-65, ill.

Nobile, Umberto. Altitude of equilibrium of an airship.

National Advisory Committee for Aeronautics, Technical Memorandums No. 306, March 1925, Washington, pp. 18, diagrs. From "Rendiconti Tecnici," Nov. 15, 1924.

- Contributo sperimentale allo studio delle variazioni di carico utile di

un'aeronave in dipendenza delle condizioni atmosferiche ambienti.

Rand. Tacn. Dir. Sup. Genio Costr. Aer., Anno 13, N. 6 (15 Giugno 1925), Roma, pp. 5-12, tabls., diagr.

Nobile, Umberto. Sistema "Nobile" per atterramento ed ammaramento meccanico di aeronavi.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 4 (15 Aprile 1925), Roma, pp. 5-17, ill.

- The trend of airship construction in Italy.

Flight, Vol. 17, Nos. 42-43 (Oct. 15-22, 1925), London, pp. 670-674, 693-696, ill., diagr. International Air Congress Brussels Oct. 7,1925.

Noble, Waeben. Twenty years of aviation. A glance into the future.

National Aeronautic Association Review, Vol. 3, No. 12 (Dec. 1925), Washington, D. C, pp. 189-190.

Nomenclature. See Bostwick, A. E.: The word aeroplane.

Nobdman. See McLaughlin, George F.: The Nordman monoplane glider.

Norma. Les phares pour l'aéro-navigation.

l'Aérophile, 33e année, Nos. 15-16 (ler-15 août 1925), Paris, pp. 252-253, ill.

Noeth Pole. The North Pole flight.

Flight, Vol. 17, No. 22 (May 28, 1925), London, p. 326.

- The North Pole trophy race.

Slipstream, Vol. 6, No. 5 (May 1925), Dayton, Ohio, pp. 15-17, ill.

- See Amundsen, Roald: Amundsen's polar flight.

- See Amundsen, Roald: Farthest north by air. Capt. Roald Amundsen's

story of the flight.

■j.

- See Byrd, R. E.: Headed for the North Pole.

- See Kleinschmidt, P. E.: The lure of the North Pole.

- See Mittelholzer, Walter. By airplane toward the North Pole; an account

of an expedition to Spitzbergen in the summer of 1923.

- See Polar flight: Navy planes to explore Arctic with MacMillan.

Norwegian expedition. See Arctic flight: Dirigible to blaze route over top of world; Norwegian expedition,

Noth, H. Waschberg und Wasserkuppe.

Flugzeug und Yacht, Bd. 1, Nr. 2 (Nov. 1923), Wien, p. 8, ill.

Notiziario de Aebonautica. First number to appear July 1925. l'Aerotecnica, Vol. 6, N. 5 (Settembre-Ottobre 1925), Pisa, p. 301.

Nukiyama, D. On the attraction between two rotating parallel cylinders in some viscous liquids.

Japanese Journal of Astronomy and Geophysics, Transactions and Abstracts, Vol. 2, No. 4, 1925, Tokyo", pp. 193-207, ill.

Nulton, L. M. Midshipmen to get wings.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, pp. 361,398, ill.

Nungessee. The Nungesser amphibian.

V. S. Air Services, Vol. 10, No. 5 (May 1925), Washington, p. 46.

o

O'Malley, Henry. Department of Commerce in Aeronautics. Bureau of Fisheries.

National Aeronautic Association Review, Vol. 3, No. 3 (March 1925), Washington, D. C, pp. 38-39.

OX5. The OX5 Humming Bird.

Aviation, Vol. 19, No. 18 (Nov. 2,1925), New York, p. 642, ill.

Obata, Jûichi, and Yahei Yoshida. On the valve method of measuring small motion, with special reference to the precise recording of sounds, pressure-variations, and vibrations.

Report of the Aeronautical Research Institute, Tokyo Imperial University, Vol. 1, No. 11 (Aug. 1925), Tokyo, pp. 305-319, ill.

Obee, Shatswell. Note on the Katzmayr effect on airfoil drag.

National Advisory Committee for Aeronautics, Technical Notes No. 214, Feh. 1925, Washington, pp. 11, ill., diagr., tabls.

- See Warner, Edward P., and Shatswell, Ober: The estimation of airplane

performance from wind-tunnel tests on conventional airplane models.

Oceanic airways. Transoceanic airways. Ambitious heavier-than-air scheme.

Flight, Vol. 17, No. 20 (May 14, 1925), London, pp. 292-293, map.

Offeemann. Die Deutsche Verkehrsausstellung. Raum 3. Forschung.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9. Sept. 1925), München, pp. 330-333, ill.

Offermann, E. Das Junkers Gross-Verkehrs-Flugzeug.

Zeitschr. Flugt. Mot., 16. Jahrg., 7. Heft (14. April 1925), München, pp. 147-148, ill.

Oil cooling. Engines. Oil cooling.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 29-30.

Oil engine. See Langley Field: Oil engine research at Langley Field.

Oils. Les huiles de graissage au dernier Salon.

L'Aéronautique, 7me année, No. 69 (fév. 1925), Paris, p. 50.

- Un régulateur de température d'huile.

L'Aérotechnique (L'Aéronautique, 7me année, No. 78), 3me année, Num. 35 (nov. 1925), Paris, p. 421, ill.

Olechnovitch, N. A. A few experiments with shock-absorbing hulls for flying boats.

Institution of Aeronautical Engineers, Minutes of Proceedings No. 15, 23d January 1925, London, pp. 5-12, ill.

Ontario. See Lyons, James: Ontario's forest air patrol. Oppenheimer, Fritz. Rechtswidriger Flugzeugbau im Kriege.

Zeitschr. Flugt. Mot., 16. Jehrg., 16. Heft (28. Aug. 1925), München, pp. 310-311.

Optical indicators. See Moss, H., and W. J. Stern: Phase setting of engine indicators.

Ob. Danzig-Stockholm.

Aut. Mot. Fhigw., 7. Jahrg., Nr. 22 (l.Dez. 1925), Berlin, pp. 629-630, ill.

Orct, Ladislas d'. The advent of the big air liner.

Aviation, Vol. 18, No. 15 (Apr. 13, 1925), New York, pp. 4U8-410, ill.

- French air expansion in South America.

Aviation, Vol. 18, No. 9 (Mar. 2, 1925), New York, pp. 241-242, map.

- International air transportation.

Aviation, Vol. 18, No. 19 (May 11, 1925), New York, pp. 514-616, ill.

- Recent French pursuit airplanes described.

Aviation, Vol. 18, Nos. 1-2 (Jan. 6-12,1925), New York, pp. 12-15, 42-45, diegr.

Obganization. How air forces in other countries are organized.

Congressional Digest, Vol. 4 (April 1925), Washington, pp. 229-230.

Orient. See Baciocchi, Alighiero: Airplanes invade the Orient.

Orlovius. Die Bedrohung des deutschen Flugverkehrs.

Ant. Mot. Flugw., 7. Jahrg., Nr. 13 (15. Juli 1925), Berlin', p. 357, ill.

- Polte 1 Teil-Epilog zum deutschen Rundflug.

Aut. Mot. Flugw., 7. Jahrg., Nr. 12 (30. Juni 1926), Berlin, p. 328.

Orly, Fbance. See Freyssinet: Concrete airship sheds at Orly, France.

Ornithopter. See Boel, Maurice: Le vol ramé des oiseaux et sa réalisation mécanique.

Obteig, Raymond. The Orteig prize.

Slipstream, Vol. 6, No. 7 (July 1925), Dayton, Ohio, p. 19. $25,000 for trans-Atlantic flight. First offered 1919.

Osbobn, Earl D. Marginal notes on the Winslow bill.

Aviation, Vol. 18, No. 8 (Feb. 23, 1925), New York, pp. 212-213.

- Modern planes vs. war surplus equipment.

Aviation, Vol. 18, No. 2 (Jan. 12, 1925), New York, pp. 47-48, ill.

- Preparing the night airway.

Aviation, Vol. 18, No. 22 (June 1, 1925), New York, pp. 604-605, ill.

0' Sullivan, P. B. The antiaircraft tests.

TJ. S. Air Services, Vol. 10, No. 5 (May, 1925), Washington, pp. 22-23.

Otey, N. S. Testing metals for aircraft.

Iron Age, Vol. 116, Nos. 25-26 (Dec. 17, 31,1925), New York, pp. 1660-1664, 1797-1800, ill.

Ott, L. A. Theorie und Konstantenbestimmung des hydrometrischen Flügels. Berlin, Verlag Julius Springer, 1925, pp. iv, 49, ill.

Ottenheimeb, J. Balistique extérieure. A. Colin, éditeur.

Oweb, E. See Reif, E. F., and E. Ower: Lift, drag,.and pitching moment of the one-fifth scale Bristol fighter model in the Duplex wind tunnel.

- See Simmons, L. F. G., and E. Ower: Elimination of the static pressure

gradient along wind tunnels of the N. P. L. type.

- See Simmons, L. F. G., and E. Ower: An investigation of the downwash in

the slipstream. (Part I.)

- See Simmons, L. F. G., and E. Ower: An investigation of the influence of

downwash on the rotary derivative Mq. Part II. The effect of the air-screw slipstream.

- See Simmons, L. F. G., and E. Ower: Test on a large aerofoil of R. A. F.

15 section.

Oxford. See Tymms, F.: The Oxford University Arctic Expedition, 1924. IV. Aerial navigation in the Arctic.

- See Tymms, F.: The Oxford University Arctic Expedition, 1924. VII.

Aerial survey.

P

PN-9. Navy seaplane makes world nonstop record.

U. S. Air Services, Vol. 10, No. 6 (June 1925), Washington, p. 46.

- Odyssey of the PN-9 No. 1.

Literary Digest, Vol. 86 (Sept. 26,1925), New York, pp. 14-15, maps.

- PN-9 No. 1 found off Hawaiian Islands.

Aviation, Vol. 19, No. 13 (Sept. 21,1925), New York, pp. 350-352, ill., map.

- PN-9 No. 1 lost on West Coast-Hawaiian flight.

Aviation, Vol. 19, No. 11 (Sept. 14,1925), New York, pp. 315-317, ill.

- The United States Navy's PN-9 flying boats.

The Aeroplane, Vol. 28, No. 20 (May 20,1925), London, p. 496, ill.

- See San Francisco: The San Francisco-Honolulu flight. The missing

PN-9 flying boat found.

Pacific. Lessons of the Pacific flight.

Scientific American, Vol. 133 (Nov. 1925), New York, pp. 340-341, 111.

- See Ranney, H. F.: A study of the manoeuvres in the Pacific.

- See United States Navy: Le raid des hydravions américains.

Packard. The new Packard aircraft engines.

Aviation, Vol. 18, No. 19 (May 11, 1925), New York, pp. 617-520, ill.

- See Woolson, L. M.: Recent developments in aircraft engines.

Page, Frederick Handlet. Een nieuw verkeersvliegtuig van Handley Page. Het VTiegveld, 9de Jaarg., No. 11 (Nov. 1925), Amsterdam, p. 286, ill.

- Prevention of accidents in commercial aviation.

Flight, Vol. 17, No. 42 (Oct. 16,1925), London, pp. 676-676.

Page, William H. Pillars of light.

Aero Digest, Vol. 7, No. 2 (Aug. 1925), New York, pp. 424-425, ill.

Paine, George Porter. Energy transformations in an unobstructed air current, in an air current containing a dry obstacle, and in an air current containing an evaporating surface; with applications to an aerodynamic psychrometer and the measurement of atmospheric humidity.

Proceedings of the National Academy of Sciences, Vol. 11, No. 9 (Sept. 1925), Washington, D. C, pp. 555-562.

Painlevé, Paul. See Lainé, André: Ce que tout aviateur doit savoir. Preface by Paul Painlevé.

Pander. The Pander light aeroplane at Croydon.

The Aeroplane, Vol. 28, No. 18 (May 6,1925), London, p. 444, ill.

- The Pander light monoplane. 30 H. P. "Y" type Anzani engine.

Flight, Vol. 17, No. 8 (Feh. 19,1925), London, pp. 93-96, ill., diagr.

- The Pander light monoplane visits Croydon.

Flight, Vol. 17, No. 18 (Apr. 30, 1925), London, pp. 254-266, ill,

- The Pander light plane.

Aviation, Vol. 19, No. 3 (July 20,1925), New York, p. 70, ill.

Panetti, M. Aerodynamic characteristics of aircraft with reference to their use.

National Advisory Committee for Aeronautics, Technical Memorandums No. 339, 1925, Washington, pp. 12. From "L'Ala d'Italia," April 1925.

- Le caratteristiche aerodinamiche degli aeromobili in relazione con la natura

del loro esercizio.

L'Ala d'Italia, Anno 4, N. 4 (aprile 1925), Milano, pp. 103-105.

- Nuovi progressi nella deduzione teorica delle caratteristiche aerodinamiche

dei piani portanti

Rivista Aeronautica, Anno 1, N. 1 (Luglio 1925), Koma, pp. 69-75.

- Recent progress in the theoretical deduction of airplane wings.

National Advisory Committee for Aeronautics, Technical Memoradums No. 338, Nov. 1925, Washington, p. 10. From "Kevista Aeronautica," July 1925.

- Sul cimento di struttura degli aeromobili per una improvvisa variazione

di carico in un punto.

Atti della Reale Accademia delle Scienze di Torino, Voi. 60 (8 marzo 1925).

Pannell, J. R. The measurement of fluid velocity and pressure. Edited by R. A. Frazer with foreword by R. V. Southwell.

London, Edward Arnold & Co., 1924, pp. vii, 136, ill.

Parachutes. Are you eligible for the Caterpillar club?

Literary Digest, Vol. 86 (Sept. 26, 1925), New York, pp. 50-66, ill.

Parachutes. Falling a mile for a diploma.

Literary Digest, Vol. 86, No. 2 (July 11, 1926), New York, pp. 24-25, 111.

- How it feels to fall 1,000 feet.

Literary Digest, Vol. 85 (May 16, 1925), New York, pp. 58-64, ill.

- Jumping into space.

Scientific American, Vol. 132 (Mar. 1925), New York, pp. 203-204, ill.

- Un sauvetage aérien par parachute.

L'Aérophile, 33e année, Nos. 1-2 (ler-15 jan. 1925), Paris, pp. 12-13, ill.

- Teaching parachute jumping.

Aviation, Vol. 18, No. 1 (Jan. 5, 1925), New York, p. 24.

- Teaching the art of parachute jumping.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, pp. 49-50.

- See Holt: The Holt "Autochute."

- See Jacobs, A. M.: Stepping out in mid-air.

- See Jones, R.: On the aerodynamic characteristics of parachutes.

- See Mazer: Airplane parachutes.

- See Mazer, P. : Les parachutes d'avion en France.

- See Seymour, L. D.: Aerial life belts.

- See Shoemaker, Gilbert A.: Lessons in parachute jumping. How and

why it is done.

- See Starr, Alva F.: Leaping into space.

- See Theiss, L. E.: Why not parachutes for dirigibles?

- See Verdurand, Abel, et Henri Bardel: L'utilisation des parachutes dans

l'aviation commerciale.

Paris. Aero engines at the Paris aero show.

Plight, Vol. 17, No. 1 (Jan. 1,1925), London, pp. 5-7, ill.

- Air liners at the Paris aeronautic salon.

Aviation, Vol. 18, No. 6 (Feb. 9, 1925), New York, pp. 158-159, diagr. Three Lateooere planes compared and Dewoitine D14 described.

- De 9de Luchtvaarttentoonstelling te Parijs.

Het Vliegveld, 9de Jaarg., No. 1 (Jon. 1925), Amsterdem, pp. 6-8, ill.

- Engine accessories at Paris aero salon.

Aviation, Vol. 18, No. 11 (Mar. 16, 1925), New York, pp. 298-299, ill.

- Le neuvième salon de l'aéronautique fut un grand salon.

L'Aéronautique, 7me année, No. 68 (Jan. 1925), Paris, pp. 1-10, ill.

- Some examples of French metal work from the Paris show.

The Aeroplane, Vol. 28, No. 1 (Jan. 7, 1925), London, pp. 10-12, ill.

- Vom Pariser salon.

Aut. Mot. Flug., 7. Jahrg., Nr. 1 (15. Jan. 1925), Berlin, p. 22, ill.

- See Agen, Myer: The Paris aero show.

- See Ide, John Jay: The Ninth Paris aeronautic salon.

- See Schubert, R.: Bericht über die IX. internationale Luftfahrzeug-Ausstellung in Paris.

Parker, Humphrey F. The uses of water recovery.

Aviation, Vol. 19, No. 1 (July 6, 1925), New York, pp. 6-7, ill.

Parker, J. Brooks B. The present status of aviation insurance.

U. S. Air Services, Vol. 10, No. 8 (Ang. 1925), Washington, pp. 39-40.

Parrott, R. J. The history and evolution of the Avro training machine.

Institution of Aeronautical Engineers, Minutes of Proceedings No. 14, 9th January 1925, London, pp. 7-42, ill.

Partington, J. R., et A. B. Howe. The ratio of the specific heat of hydrogen.

Proc. Eoy. Soc, Ser. A, Vol. 109, No. A750 (Oct. 1928), London, pp. 288-291.

Passy, P. De L. Aerial photographs aid the map maker.

Canadian Engineer, Vol. 49, No. 25 (Dec. 22, 1925), Toronto, pp. 669-660, ill.

Patrick, Mason M. Annual report of Gen. Patrick.

Aviation, Vol. 19, No. 23 (Dec. 7, 1925), New York, pp. 804-806, ill.

- Aviators as life insurance risks.

U. S. Air Services, Vol. 10, No. 1 (Jan. 1925), Washington, p. 17.

- Engineering the round-the-world flight.

U. S. Air Services, Vol. 10, No. 6 (June 1925), Washington, pp. 21-26.

- General Patrick on independent air force.

Aviation, Vol. 18, No. 24 (June 15, 1925), New York, pp. 662-663.

- General Patrick reappointed.

Aviation, Vol. 19, No. 5 (Aug. 3, 1925), New York, p. 120, ill.

- Military aircraft and their use in warfare.

Joum. Prankl. Inst., Vol. 199, No. 1 (Jan. 1925), Philadelphia, pp. 51-63.

- An outline history of military aeronautics in the U. S.

Slipstream, Vol. 6, No. 10 (Oct. 1925), Dayton, Ohio, pp. 18-19.

- The world from above.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, pp. 14-16,47.

- See United States: America's drooping wings.

Patrol airplanes. See Cocklin, Henry S.: Development of Navy patrol planes.

- See Toulmin, jr., H. A.: "He seeks the facts." An appreciation of

General Patrick.

Patterson, T. T. Do we lack air policy?

Aero Digest, Vol. 6, No. 5 (May 1925), New York, pp. 245-246, ill.

Paul, Eden and Cedar. See Mittelholzer, Walter: By airplane toward the North Pole; an account of an expedition to Spitzbergen in the summer of 1923.

Peatpield, I. L. Lift and drag of the Bristol fighter with wings of three aspect ratios. Part II. Wiud-channel work.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 2, London, 1925, pp. 421-124, diagrs.

Percheron seaplane. New French experimental seaplane.

Aviation, Vol. 19, No. 4 (July 27,1925), New York, p. 97, diagr.

Pershino, John J. Our air service should be developed to every reasonable extent both as to personnel and matériel.

TJ. S. Air Services, Vol. 10, No. 1 (Jan. 1925), Washington, p. 12.

Peru. Peruvian naval air service.

U. S. Air Service, Vol. 10, No. 9 (Sept. 1925), Washington, p. 44.

Peterson, C. G. Wright "Cyclone" engine.

Aero Digest, Vol. 6, No. 6 (June 1925), New York, pp. 304,336, ill.

Petrol pumps. See Royal Aircraft Establishment: Tests of R. A. E. gear wheel type petrol pump.

Petroleum. See Prentice, James': The petroleum industry and its influence ' on the role of the air service.

Philadelphia. Philadelphia Sesquicentennial Exposition.

Aviation, Vol. 19, No. 18 (Nov. 2,1925), New York, p. 638.

Philately. See Brunei, Georges. Aerophilatélie.

- See Müsset, Paul: Les philatelistes au Bourget.

Photo-elastic methods. See Stress: Photo-elastic methods of measuring stress.

Photoqrammetry. See Dorè, Paolo: Su di un problema di aero-fotogrammetria.

- See Nistri, A.: Note de aerofotogrammetria.

Photography. L'appareil photographique à chambres multiples en service dans l'aviation militaire aux États-Unis.

L'Aéronautique, 7me année, No. 71 (avril 1925), Paris, pp. 131-132, ill.

- Looking down on us.

Popular Mechanics, Vol. 43 (Feb. 1925), Chicago, pp. 226-232, ill.

- Modern speed photography. Aerial photographs transmitted by wire

within a few minutes of being taken.

Aviation, Vol. 19, No. 16 (Oct. 19,1925), New York, pp. 554-555.

- Nota sui sistemi di scambio delle lastre negli apparati per fotografìa aerea.

Eend. Teen. Dir. Sup. Oenio Costr. Aer., Anno 13, N. 3 (15 Marzo 1925), Roma, pp. 41-47, ill.

- United States Army air service technical school photographic department.

Photo-Era, Vol. 54 (June 1925), Wolfehoro, N. H., pp. 322-327, ill.

--See Antilli, Cesare: Cenni sulla installazione degli apparati fotografici

sugli aeroplani.

--See Beardsley, A. H.: Getting introduced to aerial photography.

--See Cochran-Patrick, C. K.: Air surveys in Burma.

- See Ewald: Die Deutsche Verkehrsausstellung. Raum 6. Luftbild

und Luftbildmessung.

-- See Läbussiere: La pbotochimie en Photographie.

- See Mazer, P.: La reconnaissance photographique à haut rendement.

-- See Passy, P. De L.: Aerial photographs aid the map maker.

- See Pierce, J. W.: Aerial photographs, surveys, and maps.

-- See Rhode, R. V. : Aerial photography in engineering.

-- See Robini: Matériels nouveaux de Photographie aérienne.

-- See Surveying: Surveying by photography from the skies.

-- See Ward, Roswell H. : A rapid aerial photographic process.

- See Wilson, E.: Commercial aspect of aerial photography.

--See Zavattiero, Enrico: Accrescimento della sensibilità dell'emulsione

fotografica mediante illuminazione preliminare.

- See Zavattiero, Enrico: Sulle caratteristiche delle emulsioni sensibil-

nei riguardi della fotografia aerea.

--See Zavattiero, Enrico: Sulla misura della velocità degli otturatori fotoi

grafici.

Photometry. See Luckiesh, M.: Aerial photometry and the visibility of airplanes.

Physic-loot. See Aviators: Progetto di massima di un impianto di cassone pneumatico da far sorgere al campo d'aviazione di Montecelio per le prove psicofisciologiche degli aviatori.

Piccione, M. La guerra futura e la aeronautica. Rome.

Pickup, Christopher. Flying in Honduras.

Aero Digest, Voi. 6, No. 5 (May 1925), New York, p. 256.

Pierce, J. W. Aerial photographs, surveys, and maps.

Canadian Engineer, Vol. 48, No. 19 (May 19,1925), Toronto, pp. 486-489, ill.

Piero Magni. The Piero Magni "Vittoria 1924" sesquiplane. A noval Italian sport piane.

Flight, Voi. 17, No. 36 (Sept. 3, 1925), London, pp. 666-568, ill.

Piero Magni I. See Vittoria: Aeroplano a finezza variabile Piero Magni I "Vittoria" 1924, 50 cav. Anzani 6-A-20.

Pilot balloons. See Dietzius, Robert: Zur Fälschung der Bahnen von Pilotballonen durch vertikale Luftströmungen.

Pilots. See Bajac, R., et L. Coupet: Impressions personnelles de pilotes de lignes.

- See Latécoère: Constatations physiologiques sur le pilotage des avions

commerciaux.

Pinedo. Italian flight to Australia and return.

Aviation, Vol. 19, No. 6 (Aug. 3, 1925), New York, p. 125, ill.

- Le voyage du Commandant de Pinedo. Rome-Melbourne—Manille-

Tokyo-Shanghai-Calcutta-Rome.

L'Aéronautique, 7me année, No. 79 (dec. 1925), Paris, pp. 443-445, ill.

- See Rome—Tokyo: Rome-Tokyo-Rome. Marquis de Pinedo's grand

tour successfully concluded.

Pioneer Instrument Company. Pioneer Instrument Company perfects inductor compass.

Slipstream, Vol. 6, No. 2 (Feb. 1925), Dayton, Ohio, p. 14, ill.

--See Compasses: The new Pioneer earth inductor compass.

Pippard, A. J. Sutton, and J. F. Baker. An experimental investigation into the properties of certain framed structures having redundant bracing members.

Aeronautical Research Committee, Reportsand Memoranda, No. 948 (Ae. 168.), December 1924, London, 1925, pp. 25, ill., diagrs., tabls.

Pippard, A. J. Sutton, and G. H. W. Clifford. An experimental investigation into the properties of certain framed structures having redundant bracing members. Report No. 2.

Aeronautical Research Committee, Reports end Memoranda, No. 971 (Ae. 186.), May 1926, London, 1925, pp. 6, tabls.

- An experimental investigation into the properties of certain framed structures having redundant bracing members. Report No. 3.

Aeronautical Research Committee, Reports and Memoranda, No. 977 (Ae.191.), September 1926, London, 1925, pp. 12, ill., tabls.

Pique, Roberto. Saving lives with airplane ambulances.

TJ. S. Air Services, Vol. 10, No. 1 (Jan. 1926), Washington, pp. 44-47, ill.

Pistolesi. The Pistolesi variable-pitch air screw.

Flight, Vol. 17, No. ii (Mar. 12,1925), London, pp. 145-148, ill

Pistolesi, E. Influsso di un vento laterale sul funzionamento delle eliche. L'Aeroteeniea, Vol. 5, No. 2 (Marzo-Aprile 1925), Pisa, pp. 93-106, diagrs.

- Lezioni di aeronautica.

Pisa, Stabilimento Vallerini, editore, 1925, pp. 595, ill.

- Studio sui sistemi di palette ruotanti in un fluido.

L'Aeroteeniea, Vol. 5, N. 5 (Settembre-Ottobre 1925), Pisa, pp. 275-288, ill.

Pistons. »See Stanton, T. E.: The friction of pistons and piston rings.

Pitching moments. »See Bradfield, P. B.: Measurement of pitching moments due to roll on wings of Avro 504. K.

--»See Bradfield, F. B.: Pitching and yawing moments with sideslip on a model

aeroplane with zero stagger.

Pitot tubes. »See Kumbruch, H.: Pitot-static tubes for determining the velocity of air.

- »See Reid, Elliott G.: Interference tests on an N. A. C. A. Pitot tube.

Planiol, A. »See Huguenard, E., A. Magnan et A. Planiol: Contribution à l'étude de la structure interne du vent.

- »See Huguenard, E., A. Magnan et A. Planiol: Etude sur l'énergie interne

du vent, son rôle dans le vol à voile et la navigation aérienne.

- »See Huguenard, E., A. Magnan and A. Planiol: Sur la mesure des efforts

aérodynamiques supportés par la voilure d'un avion.

- »See Huguenard, E., A. Magnan et A. Planiol: Sur un appareil à fil chaud

pour la détermination des grandes altitudes.

-' »See Huguenard, E., A. Magnan et A. Planiol: Sur un appariel mesurant

les déformations des ailes.

- »See Huguenard, E., A. Magnan et A. Planiol: Sur une méthode d'étude

des efforts d'inertie résultant des manœuvres de pilotage des avions.

Plank, Edward G. Aerial mapping.

Slipstream, Vol. 6, No. 4 (Apr. 1925), Dayton, Ohio, pp. 9-14, ill.

Plessis, Jean du. Les grands dirigeables dans la paix et dans la guerre. Leur passé, leur avenir, l'expérience du "Dixmude." Paris, Plon-Nourrit, éditeur, 1925, pp. xxvi, 308.

Plywood. »See Elmendorf, Armin: Plywood and metal-faced plywood.

Poeschel. Suggestions for courses of instruction in aviation.

National Advisory Committee for Aeronautics, Technical Memorandums No. 304, March, 1925, Washington, pp. 9. From "Luftfahrt," Dec. 5, 1924.

Poeschel, Johannes. Einführung in die Luftfahrt, unter Mitwirkung von Ernst Brandenburg, Erich Ewald, Walter Georgii, Hugo Kromer, Eberhard Lempertz, Oskar Ursinus, Kurt Wegener, Karl Schneider, Hermann v. Wilamowitz-Moellendorf mit Geleitworten von Hugo Eckener und Hugo Junkers im Auftrag des Deutschen Luftfahrtverbandes herausgegeben von Johannes Poeschel.

Leipzig, R. Voigtländcrs Verlag,, pp. 176, ill.

Poincaré. Considérations théoriques sur le rendement des moteurs.

La Techn. Aêron., 16e année, n. s., Nos. 48, 49 (15 oct., 15 nov. 1925), Paris, pp. 290-299, 348-349, ill.

Polar flight. Navy planes to explore Arctic with MacMillan.

TJ. S. Air Services, Vol. 10, No. 5 (May, 1925), Washington, pp. 28-30, ill., map.

- See Amundsen, Roald: My Polar flight.

- See Amundsen, Roald, and Lincoln Ellsworth: Our Polar flight.

- See Mittelholzer, Walter: By airplane toward the North Pole; an account

of an expedition to Spitzbergen in the summer of 1923.

Policy. The administration's air policy.

Aviation, Vol. 18, No. 23 (June 8, 1925), New York, p. 637.

- See National Aeronautic Association: The N. A. A. National air policy.

- See Patterson, T. T. : Do we lack air policy.

-■ See Small, A. R. : National air policy suggestions.

Polk, George W. Instruments used by the world flyers.

TJ. S. Air Services, Vol. 10, No. 2 (Feb. 1925), Washington, pp. 31-34, ill.

Poorman, W. F. Aviation hazards viewed by insurance companies. U. S. Air Services, Vol. 10, No. 9 (Sept. 1925), Washington, p. 40.

Porter. A. W. See Griffith, A. L., and A. W. Porter: On eddies formed behind apertures through which air is streaming.

Portevin. L'étude rationnelle des traitements thermiques des alliages et des alliages légers d'aluminium en particulier.

La Techn. Aeron., 16e année, n. s., No. 41 (15 mars 1925), Paris, pp. 66-80, ill.

Porto Rico. See Los Angeles: Aboard the airship Los Angeles to Porto Rico and back.

Pottum, W. De verovering van het luchtruim. Leiden, A. W. Sijthol's Uitgevers-Mij.

Poturzyn, Fischer von. Jahrbuch für Luftverkehr 1924. München, Richard Pflaum Verlag A. G., 1925, pp. 394, ill.

- Luftthansa; luftpolitische Möglichkeiten.

Leipzig, Werner Lehmann Verlag, 1925, ill.

' Powell. The Powell light 'plane. A successful American machine with Bristol "Cherub" engine.

Füght, Vol. 17, No. 53 (Dec. 31, 1925), London, pp. 852-855, ill

Powell, C. H. Construction of the Powell racer.

Aero Digest, Vol. 7, No. 6 (Dec. 1925), New York, pp. 658-659, ill.

- See McLaughlin, George F. : The Powell light plane racer.

Praeger, O. Couriers of the air.

Mentor, Vol. 13 (June 1925), Springfield, Ohio, pp. 25-31, ill.

Praetorius, K. R. H. The problem of fuel measurement (The Schiske "Konsummeter").

National Advisory Committee for Aeronautics, Technical Memorandums No. 315, May 1925, Washington, pp. 4, ül. From "Der Motorwagen," March 31, 1925.

Prague. The third Prague aviation meeting.

The Aeroplane, Vol. 29, No. 18 (Oct. 28, 1925), London, p. 508, Ü1. Flight, Vol. 17, No. 41 (Oct. 8, 1925), London, pp. 649-650.

Prandtl. See Bairstow, L. : Skin friction.

- See Bjerknes, V. : Sur les forces qui portent les aéroplanes et leur relation

avec les actions hydrodynamiques à distance.

Prandtl. See Cowley, W. L., and L. J. Jones: An experimental test of the Prandtl correction for tunnel wall interference.

- See Fage, A., and H. L. Nixon: The prediction on the Prandtl theory of

the lift and drag for infinite span from measurements on aerofoils of finite span.

- See Martin, H. M.: The elements of the Lanchester-Prandtl theory of

aeroplane lift and drag.

Prandtl, Ludwig. Bemerkung zu dem vorstehenden Aufsatz von D. Thoma.

Zeitschr. Flugt. Mot., 16. Jahrg., 10 Heft (28. Mai 1925), München, pp. 208-209, 111.

Prandtl, Ludwig, und O. Tietjbns. Kinematographische Strömungsbilder.

Die Naturwissenschaften, Heft 49-50 (4.12. dez. 1925), Berlin, pp. 1050-1051, ill.

Prandtl, Ludwig. Magnuseffekt und Windkraftschiff.

Die Naturwissenschaften, 13 Jahrg., Heft 6 (6 Feb. 1925), Berlin, pp. 94-108, ill.

- See Ackeret, J.: Das Rotorschiff und seine physikalischen Grundlagen.

Mit einem Vorwort von L. Prandtl.

- See Kârmân, Th. v.: Ludwig Prandtl.

Pratt and Whitney. Pratt and Whitney Aircraft Co. formed.

Aviation, Vol. 19, No. 5 (Aug. 3,1925), New York, p. 121, 111.

Prayer, Georg. Increasing the power of internal combustion engines.

National Advisory Committee for Aeronautics, Technical Memorandums No. 321, July 1925, Washington, pp. 11, ills. From " Der Motorwagen," Sept. 30, 1924.

Prentice, James. Influence of the helium-filled airship on future warfare and civilization.

U. S. Air Services, Vol. 10, No. 9 (Sept. 1925), Washington, pp. 27-29.

- The petroleum industry and its influence on the role of the air service.

u. S. Air Services, Vol. 10, No. 6 (June 1925), Washington, pp. 40-44, ill.

Pressure distribution. Pressure distribution on fuselage of airplane model.

National Advisory Committee for Aeronautics, Technical Memorandums No. 300, Feb. 1925, Washington, pp. 15, ill., diagrs., tabls.

From Report A 33 of the " Rijks-Studiedienst voor de Luchtvaart," Amsterdam, reprinted from "De Ingenieur," of Jan. 26, 1924.

Pressure drop. Experimental determination of pressure drop caused by wire gauze in an air stream.

National Advisory Committee for Aeronautics, Technical Memorandums No. 296, Jan. 1925, Washington, pp. 9, tabls.

From Report A 77 of the " Rijks-Studiedienst voor de Luchtvaart," reprinted from "De Ingenieur," Aug. 5, 1924.

- See Weeks, W. S., and J. T. Rutherford: A table for determining drop in

pressure in airways.

Pris. Résistance des mats et leurs interactions dans une cellule biplane. Bulletin Technique N. 22 du Service Technique de l'Aéronautique.

Pris, P. Résistance minimum des ailes à génératrices rectilignes.

L'Aérophile, 33e année, Nos. 21-22 (ler-15 nov. 1925), Paris, pp. 330-333, ills., diagrs.

Problems. See Loening, Grover: Problems of the engineer in aviation.

- See Southwell, R. V.: Some aeronautical problems of the past and the

future.

Pröll, A. Betrachtungen zum Rotorproblem.

Zeitschr. Flugt. Mot., 16. Jahrg., 3. Heft (14. Feh. 1925), München, pp. 66-72, ill.

- Vom Segel- und Kleinflugzeug.

Zeitschr. Ver. deutsch. Ing. Bd. 69 No. 47 (21. Nov. 1925), Berlin, pp. 1474-1476.

Propeller hubs. »See Merten, W. J.: The metallurgical engineering of air craft propeller hubs.

Propellers. Airscrews and gears.

The Aeroplane, Vol. 2S, Nos. 15, 21 (Apr. 15, May 27, 1925), London, pp. 358, 360, 522, 524.

- As fast as sound.

Scientific American, Vol. 133 (July 1925), New York, p. 59.

-■ Development of Curtiss-Reed duralumin propeller.

Slipstream, Vol. 6, No. 1 (Jan. 1925), Dayton, Ohio, pp. 27-28, ill.

- /First magnesium propeller a success. Slipstream, Vol. 6, No. 3 (March,

1925), Dayton, Ohio, p. 25, ill.

- First magnesium propeller meets test well.

TJ. S. Air Services, Vol. 10, No. 4 (April 1925). Washington, p. 47, ill.

- First magnesium propeller successfully tested.

Aviation, Vol. 18, No. 9 (Mar. 2, 1925), New York, p. 248, ill.

- Les hélices du Salon.

L'Aérotechnique (L'Aéronautique, 7me année, No. 68), 3me année, Num. 25 (Jan. 1925), Paris, p. 24.

- Metal air-screw progress.

Flight, Vol. 17, No. 20 (May 14, 1924), London, p. 298, ill.

- Nieuport produces steel propeller.

Aviation, Vol. 18, No. 7 (Feb. 16, 1925), New York, p. 191, diagr.

- »See Ackeret, J.: Neuere Untersuchungen der aerodynamischen Versuchsanstalt, Göttingen.

- »See Airscrews: Aerodynamics. Airscrews.

- »See Berst, C. A.: The Kirsten-Boeing aerial propeller.

- »See Bienen, Th.: Die günstigste Schubvertailung für die Luftschraube

bei Berücksichtigung des Profilwiderstandes.

- »See Bienen, Th.: Weiterer Beitrag zur Theorie der Luftschrauben.

- »See Bienen, Th., und Th. v. Kàrmàn: Zur théorie der Luftschrauben.

- »See Biondi, Luigi: I coefficienti di spinta e di potenza per l'elica funzionante a punto fisso e in vicinanza di esso.

- »See Cowley, W. L.: A note on the Katzmayr effect; that is, the effect on

the characteristics of an aerofoil produced by an oscillating air stream.

- »See Douglas, G. P., and R. McK. Wood: The effects of tip speed in airscrew performance.

- »See Dyson, Charles: Screw propellers and estimation of power for propulsion of ships, also airship propellers.

- »See Fage, A..: The effect of a large boss on air-screw performance.

- »See Fage, A. : An experimental study of the vibrations in the blades and

shaft of an air screw.

- »See Fréchet, Charles: Le développement des hélices métalliques Reed.

- »See Glauert, H.: The efficiency of a tandem system of air screws.

- »See Glauert, H.: Notes on the vortex theory of air screws.

- »See Iurieff, B. N: Air screws (propellers).

- »See Jansen, Carl: Der Einfluss der Verdrehung der Flügelquerschnitte

infolge der Steigung der Luftschraube auf die Festigkeitsrechnung.

Propellers. See Leitner-Watts : The Leitner-Watts metal propeller.

- See Leparmentier: Le freinage des avions par l'hélice à pas variable.

- See Leroux, E. Sur un paramètre de similitude mécanique dans le

mouvement des fluides et son application à l'étude de la cavitation des hélices aériennes.

- See Lock, C. N. H., H. Bateman, and H. C. H. Townend: The air flow

round a body as affecting air-screw performance.

- See Lock, C. N. H., H. Bateman, and H. C. H. Townend: Experiments to

verify the independence of the elements of an air-screw blade.

- See Lock, C. N. H., and H. Bateman: Experiments with a family of air

screws. Part III. Analysis of the family of air screws by means of the vortex theory and measurements of total head.

- See Lock, C. N. H., and H. Bateman: Some experiments on air screws at

zero torque, with applications to a helicopter descending with the engine "off," and to the design of windmills.

- See Lynam, E. J. H. : Experiments with a close tandem air screw pair.

- See Meredith, F. W. : Full scale determination of the characteristics of a

variable pitch air screw.

- See Münk, Max Michael: Model tests on the economy and effectiveness

of helicopter propellers.

- See Pistolesi: The Pistolesi variable-pitch air screw.

- See Rackwitz, E.: Die Micarta-propeller.

- See Reed: Sulle eliche metalliche e in particolare la Reed.

- See Rios, L. Sante da: Elica sostentatrice ad anello.

- See Simmons, L. F. G., and E. Ower: An investigation of the influence

of downwash on the rotary derivative Mq. Part II. The effect of the air screw slipstream.

- See Steinitz, Otto: Vom Luftschiffszum Riesenflugzeugpropeller.

- See Stewart, J. A. : A new propeller idea.

- See Weicht, Fred E. : Propeller scale effect and body interference.

- See Weick, Fred E. : Simplified propeller design for low-powered airplanes.

- See Wooster, S. H.: The case for the metal propeller.

Pulitzer. The history of the Pulitzer races.

Aviation, Vol. 19, No. 16 (Oct. 19, 1925), New York, p. 545, ill.

- The International Pulitzer meeting at New York.

The Aeroplane, Vol. 29, No. 13 (Sept. 23, 1925), London, p. 372.

- The New York air meet. Details of the Pulitzer race.

Flight, Vol. 17, No. 44 (Oct. 29, 1925), London, p. 704.

-— See Keys, C. M.: New planes for Pulitzer trophy race indicate America's

strength in the air.

- See Marshall, Edward: Winning the Pulitzer race. An interview with

"Cy" Bettis.

Pulitzer racers. See Gilmore, W. L. : Testing the Pulitzer racers.

Pumps. See Royal Aircraft Establishment: Tests of R. A. E. gear wheel-type petrol pump.

Putnam, George R. Department of Commerce in Aeronautics. Bureau of Lighthouses.

National Aeronautic Association Review, Vol. 3, No. 3 (March, 1925), Washington, D. C, pp. 41-42.

R

R. A. F. 26—See Bradfield, F. B., and A. S. Hartshorn: Test of three aerofoils suitable for high speed. A. D. 1, Sloane, and R. A. F. 26.

R. D. L'aviation à l'étranger.

L'Aérophile, 33e année, Nos. 3-4 (ler-15 iév. 1925), Paris, pp. 38-42, ill.

R. R. Berliner "Werbeflugtag am Ostermontag, den 13. April 1925, auf dem Flugplatz Staaken.

Aut. Mot. Flugw., 7. Jahrg., Nr. 6 (31. MSrz, 1925), Berlin, p. 163.

R. S. Des nouvelles de F.-S. Lahm.

L'Aérophile, 33e année, Nos. 9-10 (ler-15 mai 1925), Paris, pp. 147-148, ill.

RS-1. The airship RS-1.

Slipstream, Vol. 6, No. 9 (Sept. 1925), Dayton, Ohio, p. 10, ill.

RS-1. Clutches and transmissions for the RS-1.

Aviation, Vol. 19, No. 1 (July 6, 1925), New York, pp. 12-13, ill.

R-33. L'aventure du dirigeable anglais R-33.

L'Aérophile, 33e année, Nos. 9-10 (ler-15 mai 1925), Paris, p. 142, ill.

- L'aventure du dirigeable R-33.

L'Aéronautique, 7me année, No. 73 (juin, 1925), Paris, p. 237, ill.

- La fuga del R-33.

Iberlca, Afio 12, Num. 678 (16 de Mayo de 1925), Tortosa, pp. 305, 309, ill.

- "Many congratulations, airship."

Flight, Vol. 17, No. 15 (Apr. 9, 1925), London, pp. 209-210, ill.

- The R-33 emulates the Shenandoah. The reconditioned British airship

R-33 is blown from her mast and returns safely to her hangar.

Aviation, Vol. 18, No. 17 (Apr. 27, 1925), New York, pp. 464-465, ill.

- R. 33 sees it through.

The Aeroplane, Vol. 28, No. 16 (Apr. 22, 1925), London, pp. 380, 382, ill.

- The R. 33's new nose.

The Aeroplane, Vol. 29, No. 9 (Aug. 26, 1925), London, p. 270, ill.

- R. 33's night out.

Flight, Vol. 17, No. 17 (Apr. 23,1925), London, pp. 246-249, ill., map.

R. 38. R. 38 memorial.

Journ. Roy. Aer. Soc, Vol. 29, No. 175 (July, 1925), London, pp. 296-298, ill.

Racing. On air racing.

The Aeroplane, Vol. 29, No. 5 (July 29, 1925), London, pp. 133-134.

- See Doolittle, J. H.: Air racing.

Racing planes. See Keys, C. M.: Value of racing planes.

Rackwitz, E. Die Micarta-Propeller. Nach den Veröffentlichungen von F. W. Caldwell und N. S. Clay.

Zeitschr. Flugt. Mot., 16. Jahrg., 4. Heft (28. Feh. 1925), München, pp. 104-105, diagr.

Radiators. See Harris, R. G., and L. E. Caygill: Further experiments on honeycomb radiators.

- See Harris, R. G., and W. K. Alford: Wind channel tests on radiators.

Radiators. See Serck: Serck radiators.

Radio. Development of aircraft radio by the Navy.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, p. 49.

- See Breckel, Harry F.: Aircraft radio. Its early history and more recent

developments.

- See Breckel, Harry F.: Radio for aircraft.

- See Külebakin, V. S.: Ueber die Beseitigung der störenden Wirkung des

elektrischen Zündssystems der Explosionsmotoren auf den Radioempfang bei Flugzeugen.

- See Sinclair, D.: Civil aviation wireless.

Radio beacon. See Murphy, W. H.: The radio beacon.

Radio compass. See Compass: Radio compass to guide airmen through cloud and fog.

Raethjen, P. Flugeigenschaftsbestimmungen an Segelflugzeugen. (Ergebnisse des Messtrupps des Rhönsegelflug-Wettbewerbes 1924).

Zeitschr. Flugt. Mot., 16. Jahrg., 12. Heft (27. Juni. 1925), München, pp. 235-240, diagrs.

Raffaelli, Italo. Progetto di massima di turbo-motore di aviazione DA 450 HP.

Rend, Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 2 (15 Feb. 1925), Roma, pp. 5-15, ill., diagrs.

- Sui motori di quota.

Rend. Teen. Dir. Sup. Genio Aero., Anno 13, N. 4 (15 Aprile 1925), Roma, pp. 17-23, diagr.

Railway surveys. See Wicksteed, H. K.: Making railway reconnaissance surveys by aerial methods.

Raley, H. Airway-starway.

Pan American Magazine, Vol. 38, (Mar. 1925), Santiago, Chile, pp. 83-87, ill.

Ramsbottom, J. E. Aircraft fabrics.

Transactions of the Faraday Society, Vol. 20, Part 2, No. 59 (Dec. 1924), London, pp. 295-302, ill.

Range, A prediction of airplane range.

Aviation, Vol. 18, No. 17 (Apr. 27,1925), New York, p. 466, chart.

Rankin, Enid Scott. The dominion of sea and air.

New York and London, The Century Co., [19251, pp. xii, 339.

Ranney, H. F. The aviation inquiry.

U. S. Air Services, Vol. 10, No. 11 (Nov. 1925), Washington, pp. 16-20.

- Col. William Mitchell on trial.

U. S. Air Services, Vol. 10, No. 12 (Dec. 1925), Washington, pp. 25-28, ill.

- Legislative proposals.

TJ. S. Air Services, Vol. 10, No. 9 (Sept. 1925), Washington, pp. 19-22.

- President Coolidge names board of nine to decide aviation's needs.

U. S. Air Services, Vol. 10, No. 10 (Oct. 1925), Washington, pp. 22-25, ill

- A study of the manoeuvres in the Pacific.

TJ. S. Air Services, Vol. 10, No. 8 (Aug. 1925), Washington, pp. 19-21

Records. The British seaplane world's record. Some further facts and figures. Flight, Vol. 17, No. 42 (Oct. 15, 1925), London, p. 668.

- A British world's speed record. Biard on Supermarine-Napier S. 4

averages 226.752 m. p. h.

Flight, Vol. 17, No. 41 (Oct. 8,1925), London, p. 651, ill.

Records. Italy establishes 20 new world's records. Rolls-Royce engines used.

Flight, Vol. 17, No. 11 (Mar. 12, 1925), London, p. 144.

- Latest official aviation records.

Aero Digest, Vol. 6, No. 1 (Jan. 1925), New York, pp. 39-40, 46.

- New flying records recognized.

Aviation, Vol. 19, No. 8 (Aug. 24,1925), New York, p. 211.

- New world seaplane record.

National Aeronautic Association Eeview, Vol. 3, No. 6 (June, 1925), Washington, D. C, pp. 91-92.

- Recent airplane and seaplane records.

Aviation, Vol. 19, No. 22 (Nov. 30, 1925), New York, p. 775.

- Les records du monde de durée et de distance.

L'Aérophile, 33e année, Nos. 15-16 (ler-15 août 1925), Paris, pp. 227-229, ill.

- The world's duration record. Some further details concerning the wonderful Farman performance.

Flight, Vol. 17, No. 35 (Aug. 27, 1925), London, p. 550, ill.

- World's records in aviation.

Flight, Vol. 17, No. 5 (Jan. 29, 1925), London, pp. 54-65.

- The world's seaplane speed record.

The Aeroplane, Vol. 29, No. 16 (Oct. 14, 1925), London, pp. 443, 445, ill. Supermarine-Napier S. 4.

- See Dollfus, Charles: Considérations sur les records d'aviation.

- See Jones, Ernest: Chronology of world and American air records.

- See Marieni, G.: Il più grande volo del mondo (raid di 55 mila km.).

Recruiting. Antiaircraft recruiting.

Flight, Vol. 17, No. 18 (Apr. 30, 1925), London, p. 253, ill.

Red Cross. See Julliot, Ch.-L.: Les aéronefs sanitaires et l'emblème delà Croix-Rouge.

Redden, C. F. Aircraft industry abroad.

Aero Digest, Vol. 7, No. 4 (Oct. 1925), New York, p. 534.

Redinqton, Paul G. Aerial fire patrol on the national forests. Aviation, Vol. 19, No. 9 (Aug. 31, 1925), New York, pp. 248-249.

Reed. Sulle eliche metalliche e in particolare la Reed.

Notiziario di Aeronautica, N. 6 (giugno 1925), Roma, pp. 167-179, ill.

Reed, Thomas R. Meteorological aspects of the San Francisco-Hawaii airplane flight.

Monthly Weather Review, Vol. 53, No. 9, W. B. No. 878 (Sept. 1925), Washington, pp. 384-387, ill.

Refueling. Flying filling-stations in the sky.

Literary Digest, Vol. 86, No. 10 (Sept. 5, 1925), New York, pp. 64-56, ill.

- Refueling in the air.

National Aeronautic Association Review, Vol. 3, No. fi (May 1925), Washington, D. C, p. 77.

Reichelderfer, Francis W. The present meteorological needs of aeronautics.

u. S. Air Services, Vol. 10, No. 8 (Aug. 1925), Washington, pp. 22-28, ill. Monthly Weather Review, Vol. 53, No. 6 (June 1925), W. B. No. 872, Washington, 1925. p. 259.

Reid. The Reid reaction time apparatus.

The Aeroplane, Vol. 29, Nos. 7-8 (Aug. 12-19, 1925), London, pp. 222, 246, 248.

Reid, Elliott G. The effects of shielding the tips of airfoils.

National Advisory Committee for Aeronautics, Report No. 201, May 9, 1925, Washington, Government Printing Office, 1925, pp. 9, ill., diagrs., tabls.

- Interference tests on an N. A. C. A. Pitot tube.

National Advisory Committea for Aeronautics, Report No. 199, Mar. 6,1925, Washington, Government Printing Offica, 1925, pp. 8, ill.

- Standardization tests of N. A. C. A. No. 1 wind tunnel.

National Advisory Committea for Aeronautics, Report No. 195, Fab. 7, 1925, Washington, Government Printing Office, 1924, pp. 31, ill., diagrs., tabls.

—— Tests of rotating cylinders.

Flight, Vol. 17, No. 2 (Jan. 8, 1925), London, pp. 17-20, ill., diagrs.

- See Cylinders: Rotating cylinders.

Reid, .H. J. E., and Otto E. Kirchner. An altitude chamber for the study and calibration of aeronautical instruments.

National Advisory Committea for Aeronautics, Technical Notes No. 229, Nov. 1925, Washington, pp. 13, ill., diagrs.

Reuneker, F. H. De beginselen der aerodynamica.

Amsterdam, Uitgeversmij v. h. van Mantgam & De Does, 1925.

Reklame. See W., F. : Flugzeug-Reklame.

Relf, E. F. The lateral stability of S. E. 5a in gliding flight.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 251-262, diagrs., tabls. Reports and Memoranda No. 846. August, 1922. (Aa. 89.)

Relf, E. F., and E. Owes. Lift, drag and pitching moment of the Y§ scale Bristol fighter model in the Duplex wind tunnel.

Aaronautics. Techn. Rap. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 432-441, ill., diagrs., tabls.

Reports and Mamoranda, No. 876. May, 1923. (Aa. 110.)

Relf, E. F., and L. J. Jones. Measurements of lift, drag, and pitching moment on the % scale model of the Bristol fighter with airscrew running. Aaronautical Rasaarch Committea, Raports and Mamoranda, No. 937, (Aa. 158.) July 1924, London, 1925, p. 20. diagrs., tabls.

Relf, E. F., and L. F. G. Simmons. On the frequency of the eddies generated by the motion of circular cylinders through a fluid.

London, Edinburgh, and Dublin Philosophical Magazina and Journal of Scianca, Vol. 49, No. 290 (Fab. 1925), London, pp. 509-511, ill.

Renault. Le moteur Renault du concours de grande endurance.

L'Aérophila, 33a année, Nos. 19-20 (lar-15 oct. 1925), Paris, pp. 314-315.

Research. Aeronautic research to be undertaken by American Engineering Council.

Mechanical Engineering, Vol. 47, No. 6 (June 1925), New York, pp. 518-519.

Resistance. K. S. V 2.

Tha Aaroplana, Vol. 29, No. 25 (Dec. 16, 1925), London, pp. 698-700.

- See Albenga, G.: Calcolo di resistenza degli aeroplani.—Nota prima: Le

azioni esterne ed il coefficiente di rottura.

- See Crocco, G. Arturo: Alcune idee moderne sulla resistenza delle carene.

- See Duhamel, Rob: Étude sur les corps lacrymiformes. Formes de

moindre résistance à l'avancement.

- See Gebers, Friedrich: Law of similitude for the surface resistance of

lacquered planes moving in a straight line through water.

- See Kempf, G. : Ueber den Reibungswiderstand von Flâchen verschiedener

Form.

Resistance. See Lecœuvre, R. : La résistance des voilures d'avions. Un nouvel appareil de vérification rapide.

- See Sabatier, J.: Les essais statiques et les calculs de résistance des avions.

- See Sezawa, Katsutada: Relation between the resistance and the directional stability of an airship.

Reyneker, F. H. De beginselen der hydro- en aerodynamica.

Het Vliegveld, 9de Jaarg., No. 1-2 (Jan.-Feb. 1925), Amsterdam, pp. 11-13, ill.

- De belasting van vleugels.

Het vliegveld, 9de Jaarg., Nos. 5-6 (Mei-Juni 1925), Amsterdam, pp. 128-130. ill

- Het Farman "Jabiru" verkeersvliegtuig.

Het Vliegveld, 9de Jaarg., No. 5 (Mei 1925), Amsterdem, pp. 123-124, ill.

- Het Focke-Wulf verkeersvliegtuig, type A 16.

Het Vliegveld, 9de Jaarg., No. 1 (Jan. 1925), Amsterdam, pp. 9-10, ill.

Reynolds, John N. Tactical employment of combat aviation.

U. S. Air Services, Vol. 10, No. 1 (Jan. 1925), Washington, pp. 13-16, ill.

Rhode, R. V. Aerial photography in engineering.

Wisconsin Engineer, Vol. 29, No. 8 (May 1925), Madison, pp. 144-147, ill.

Rhön. See Dubois, Paul, und Wolfgang Kaempfert: Flugbahnen und Stromfeld im Luv. (Ergebnisse des Messtrupps des Rhönsegelflug-Wettbewerbes.)

- See Koschmieder, Harald: Die Arbeiten des Messtrupps während des

Rhönsegelflug-Wettbewerbs 1924.

- See Koschmieder, Harald: Zur Kenntnis des Stromfeldes in Lee. (Ergebnisse des Messtrupps des Rhönsegelflng-Wettbewerbes 1924.)

- See Raethjen, P.: Flugeigenschaftsbestimmungen an Segelflugzeugen.

(Ergebnisse des Messtrupps des Rhönsegelflug-Wettbewerbes 1924.)

- See Schlink, W. : Die Lehren des Rhön-Wettbewerbes 1925 für die Zukunft.

Ricaud, M. See Camichel, A., L. Escande et M. Ricaud: Sur l'écoulement des fluides visqueux autour d'un obstacle.

- See Escanda, L., et M. Ricaud: Sur la similitude des fluides visqueux.

RiCHARnsoN, H. C. See Naval aeronautics: Development in naval aeronautics.

RiCHARnsoN, Lewis F. The variance of upper wind and the accumulation of mass.

Memoirs of the Royal Meteorological Society, Vol. 1. No. 4, London, pp. 59-78 tahls., diagrs. (Reprint.)

Richter, L. Zur Berechnung der Luftröhrchenkühler.

Zeitschrift für angewandte Mathematik und Mechanike, Bd. 5. Heft 4 (Aug. 1925).

Rickenbacker. The Rickenbacker commercial aero engine. A new air-cooled radial of American design.

Flight, Vol. 17, No. 61 (Dec. 17, 1925), London, pp. 828-829, ill.

- The Rickenbacker light engine.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, pp. 614, 636, ill.

- See Engines: Rickenbacker designs light motor for commercial aircraft.

- See Gillette, L. S. : Rickenbacker enters aircraft field with 75-horsepower

radial engine.

Rickenbacker, Eddie. America's future in the air.

Aero Digest, Vol. 6, No. 4 (April 1925), Now York, pp. 188-190, ill.

Rickenb acker, Edward V. How good landing fields are made. TJ. S. Air Service, Vol. 10, No. 10 (Oct. 1925), Washington, p. 21.

RinawAT, Allen. Airways and air-maps.

Aero Digest, Vol. 6, No. 3 (Mar. 1925), New York, p. 136, ill.

Rienau, Rudolf. Die Schule des Fliegens.

Aut. Mot. Flugw., 7. Jahrg., Nr. 8, 9 (30. April, 15. Mai 1925), Berlin, pp. 217-218, 245-246, ill.

Rigid airships. See Frazer, R. A. : The rigid airship in relation to full-scale experiment.

- See Maxson, Herburt W. : First semirigid airship to be designed and built

in the United States.

Rus, Roger William. Commercial crop dusting. Details of the operations of the Huff Daland dusters.

Aviation Vol. 18. No. 21 (May 25,1925), New York, p. 573, ill.

Rijks-Studiedienst voor de Luchtvaart. Verslagen en Verhandelingen van den Rijks-Studiedienst voor de Luchtvaart. Deel III.

Amsterdam, 1925.

RiNGK, R. Die Herrichtung der Landflughäfen und ihre Unterhaltung.

Zeitschr. Flugt. Mot., 16. Jahrg., 21. Heft (14. Nov. 1925), München, pp. 447-149.

Rios, L. Sante da. Elica sostentatrice ad anello.

Annali dellaR. Scuola d'Ingegneria di Padova, Anno 1, N.4 (Nov. 1925).

Rizzo, Frank. The Flettner rotor ship in the light of the Kutta-Joukowski theory and of experimental results.

National Advisory Committee for Aeronautics, Technical Notes No. 228, Oct. 1925, Washington, pp. 22, ill.

Robbins, C. R. See Kemp, R. C, C. G. Lewis, C. W. Scott and C. R. Robbins: Aerophoto survey and mapping of the forests of the Irrawaddy Delta.

Robertson, F. A. de V. Proposed Antarctic flight. Amundsen's "Wal" to be used. Plans of Capt. G. H. Wilkins, M. C.

Flight, Vol. 17, No. 38 (Sept. 17, 1925), London, pp. 598-599, map.

- The R. A. F. and Army manoeuvres.

Flight, Vol. 17, No. 24 (Aug. 20, 1925), London, p. 540.

- The R. A. F. in army manoeuvres.

Flight, Vol. 17, No. 40 (Oct. 1,1925), London, pp. 629-040, ill., map.

- Some impressions of the R. A. F. display.

Flight, Vol. 17, No. 27 (July 2, 1925), London, p. 414.

Robini. Matériels nouveaux de photographie aérienne.

L'Aêrotechnique, (L'Aéronautique, 7me année, No. 70), 3 me année, Num. 27 (mars 1925), Paris, pp. 105-106, ill.

Robinson, Ernest. Equipment used for aerial surveying.

Mechanical Engineering, Vol. 47, No. 3, 4 (Mar.-Apr. 1925), New York. pp. 170-174, 303, ill. TJ. S. Air Services, Vol. 10, No. 8 (Aug. 1925), Washington, pp. 32-38, ill.

Rockenfeller, Walther. Die Wirtschaftlichkeit als Grundgedanke der Wertung im Deutschen Rundflug 1925.

Aut. Mot. Flugw., 7. Jahrg., Nr. 12 (30. Juni 1925), Berlin, p. 327.

Rodda, Douglas W. Commercial aviation and insurance.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, pp. 364-365, 394, ill.

Rodgers, John. Rodgers tells his story of the flight.

U. S. Air Service, Vol. 10, No. 10 (Oct. 1925), Washington, pp. 19-21.

- See United States Navy: Le raid des hydravions américains.

Rohrbach. L'hydravion métallique bimoteur Rohrbach Ro. III.

L'Aérotechnique, (L'Aéronautique, 7me année, No. 78), 3me année, Num. 35 (nov. 1925), Paris, p. 415, ill.

- L'hydravion "Rohrbach no. II."

L'Aérotechnique (L'Aéronautique, 7me année, No. 72), 3me année. Num. 29 (mai 1925), Paris, p. 184, ill.

- Rohrbach all-metal flying boat is given tryout.

The Ace, Vol. 7, No. 1 (Aug. 1925), Glendale, Cai., p. 8, ill.

- Das Rohrbach-Flugboot Type Ro. III.

Aut. Mot. Flugw., 7. Jahrg., Nr. 11 (15. Juni 1925), Berlin, pp. 300-302, ill.

- See Teller, Otto: Rohrbach-Metallflugzeugbau auf der Deutschen Verkehrsausstellung.

Rohlfs, Roland. A new night aerial advertising sign.

Aviation, Vol. 19, No. 23 (Dec. 7, 1925), New York, p. 809.

Rolland. La navigation aérienne au Sahara.

L'Aéronautique, 7me année. No. 74 (Juil. 1925), Paris, p. 242.

Rollino moment. See Scarborough, James B. : Some problems on the lift and roiling moment of airplane wings.

Rome. See Coppa d'Italia: The Coppa d'Italia.

Rome-Tokyo. Rome-Tokyo-Rome. Marquis de Pinedo's grand air tour successfully concluded.

Flight, Vol. 17, No. 46 (Nov. 12, 1925), London, p. 756, map.

Ronan, K. M. See Crowley, J. W., jr., and K. M. Ronan: Characteristics of a single-float seaplane during take-off.

Rosner-Hertalf, Franz. Biologische Prinzipien am Flugzeug. Wien, Verleg Weiler & Co.

Rota, Augusto. Nota sulla determinazione della variazione dei tempi di salita e della quota di tangenza corrispondenti a determinate variazioni del peso dell' apparecchio e della potenza del motore.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 3 (15 Marzo 1925), Roma, pp. 12-19, diagrs.

- Sulla riduzione ad aria tipo dei risultati delle prove di salita dei velivoli.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 3 (15 Marzo 1925), Roma, pp. 20-32, diagrs.

Rotameter. See Simmons, W. H., and F. C. Sutton: Measurement of the rate of flow of fluids by the rotameter.

Rotating cylinders. See Frazier, R. A. : On the motion of circular cylinders in a viscous fluid.

- See Nukiyama, D.: On the attraction between two rotating parallel

cylinders in some viscous liquids.

- See Wolff, E. B.: Preliminary investigation of the effect of a rotating

cylinder in a wing.

Rotating paddles. See Pistolesi, E.: Studio sui sistemi di palette ruotanti in un fluido.

Rotor. L'avion rotor.

L'Aérotechnique, (L'Aéronautique, 7me année. No. 70), 3me année, Num. 27 (mars 1925), Paris, pp. 99-100, ill.

- See Ackeret, J.: Neuere Untersuchungen der Aerodynamischen Versuchsanstalt, Göttingen.

Rotor. See Ackeret, J.: Das Rotorschiff und seine physikalischen Grundlagen.

- See Bairstow, L. : The rotor ship and aeronautics.

- See Bose, N. K.: Hydrodynamical principles of Herr Flettner's "Rotor

ship."

- See Chait, B. A.: Le rotor, instrument à progrès, en marge du "Flettner-

Rotor."

——■ See Cylinders: Rotating cylinders.

-■ See Delanghe, G. : L'aérodynamique des cylindres tournants.

- See Flettner, Anton: Anwendung der Erkenntnisse der Aerodynamik

Zum Windvortrieb von Schiffen.

- See Gymnich, Alfried: Flettner-Rotor und Flugtechnik.

- See Kiemin, Alexander: Is the Magnus effect applicable to aircraft?

- See Lock, C. N. H.: On the system of vortices generated by a circular

cylinder in steady motion through a fluid.

- See Low, A. R. : The reaction of a stream of viscous fluid on a rotating

circular cylinder.

- See Pröll, A.: Betrachtungen zum Rotorproblem.

- See Reid, Elliott G. : Tests of rotating cylinders.

- See Reif, E. F., and L. F. G. Simmons: On the frequency of the eddies

generated by the motion of circular cylinders through a fluid.

- See Rizzo, Frank: The Flettner rotor ship in the light of the Kutta-

Joukowski theory and of experimental results.

- See Roy, Maurice: A propos de l'aéro-dynamique du cylindre. Le

phénomène de Magnus. Son application à la propulsion des navires.

- See Wings: A new development of the rotor-aerofoil.

- See Wings: Preliminary study of the influence of a rotating cylinder on

a wing.

Rotzoll, Hermann. Bemerkungen zu dem Aufsatz von W. Bleistein "Der Einfluss der Geschwindigkeit auf die Airtschaftlichkeit der Verkehrsluftschiffe" in Heft 22,23 und 24 Jahrgang 1924 dieser Zeitschrift.

Zeitschr. Flugt. Mot., 16. Jahrg., 7. Heft (14. April 1925), München, p. 156.

Round the world flight. See Austin, O. P.: Significance of the globe flight from a commercial standpoint.

Routes. London, Rangoon, and way stations by air.

Literary Digest, Vol. 85 (Apr. 25,1925), Now York, pp. 58-65, ill., map.

Rowe, A. P. The northerly turning error of compasses in aircraft.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 594-600, ill., diagrs. Reports and Memoranda, No. 875. November, 1921. (M. N. 7.)

Rot, Maurice. A propos de l'aérodynamique du cylindre. Le phénomène de Magnus. Son application à la propulsion des navires.

LAérophile, 33e armée, Nos. 5-8 (ler-15 mars, ler-15 avril, 1925), Paris, pp. 67-70, 113-118, ill.

- A propos de recherches théoriques sur l'aérodynamique.

LAérophile, 33e année, Nos. 23-24 (ler-15 déc, 1925), Paris, pp. 368-370.

- Le paradoxe de d'Alembert et les théories aérodynamiques.

L'Aérotechnique (L'Aéronautique, 7me année, No. 72), 3me année, Num. 29 (mai 1925), Paris, pp. 175-179.

Rot, Maurice. Sur quelques questions générales d'aérodynamique. La théorie de tourbillons, le problème aérodynamique général et le régime permanent. L'Aérotechnique (L'Aéronautique, 7me année, No. 73), 3me année, Num. 30 (Juin 1925), Paris, pp. 215-222, il].

Royal aero club. The second Royal Aero Club dinner-debate.

The Aeroplane, Vol. 29, No. 26 (Dec. 23, 1925), London, pp. 722-726.

--See Buchanan, J. S.: Royal Aero Club light aeroplane competition.

Royal aeronautical society. The Royal Aeronautical Society fellowships. The Aeroplane, Vol. 28, No. 4 (Jan. 28,1925), London, p. 84.

Royal air force. Engineers, editors, scientists, and staff officers.

The Aeroplane, Vol. 28, No. 25 (June 24, 1925), London, pp. 632, 634.

--An official valuation of the technical staff of the R. A. F.

The Aeroplane, Vol. 28, No. 2 (Jan. 14, 1925), London, p. 30.

- On engineers in the R. A. F.

The Aeroplane, Vol. 28, No. 12 (Mar. 25, 1925), London, pp. 269-270.

- On scientists and engineers and the R. A. F.

The Aeroplane, Vol. 28, Nos. 22, 25 (June 3, June 24, 1925), London, pp. 533-536, 613-618.

- On the R. A. F. display.

The Aeroplane, Vol. 29, No. 1 (July 1, 1925), London, pp. 1-24, ill.

- On the spirit of the Air Force.

The Aeroplane, Vol. 29, No. 12 (Sept. 16, 1925), London, pp. 329-334.

--The R. A. F. display.

Aviation, Vol. 19, No. 4 (July 27, 1925), New York, pp. 94-95.

--Regulations for admission to the Royal Air Force cadet college, Cranwell.

Air Publication 121, London, H. M. Stationery Office.

--The rehearsal of the R. A. F. display.

The Aeroplane, Vol. 28, No. 23 (June 10, 1925), London, pp. 574, 576, ill.

- Report on the health of the Royal Air Force for the year 1923.

Air Publication 1103, February, 1925, London, H. M. Stationery Office.

- The Royal Air Force as a career.

London, H. M. Stationery Office. Air publication 1100.

- The Royal Air Force display.

Flight, Vol. 17, No. 26 (June 25, 1925), London, pp. 384-387, ill.

--Royal Air Force display Hendon, June 27.

Flight, Vol. 17, No. 27 (July 2, 1925), London, pp. 403-414, ill.

- Royal Air Force has engineering problems.

Aviation, Vol. 18, No. 24 (June 15, 1925), New York, pp. 670-671.

- Royal Air Force pocketbook, 1924.

Air Publication 1081, London, H. M. Stationery Office.

-- See Grey, Charles Grey: The status of the Royal Air Force.

- See Lympne: R. A. F. August meeting at Lympne.

- See Robertson, F. A. de V.: The R. A. F. in army manoeuvres.

- See Robertson, F. A. de V.: Some impressions of the R. A. F. display.

Royal Aircraft Establishment. Determination of scale effect on the center of pressure of R. A. F. 14, B. E. 2C biplane with three values of stagger.

Aeronautics. Techn. Eep. Aer. Eos. Com., 1922-21, Vol. 2, London, 1925, pp. 484-506, diagrs., tabl.

Reports and Memoranda, No 899. January 1924. (Ae. 129.)

Royal Aircraft Establishment. Exhaust manifold temperatures.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 665-667. Reports and Memoranda, No. 907. November 1923. (F. 5.)

- Fire experiments with various types of fireproof bulkheads.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1926, pp. 662-064, ills., tabls.

Reports and Memoranda, No. 852. November 1922. (F. 3.)

- Flight tests with R. A. E. electrical indicator.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 6Î1-628, Ills., diagrs.

Reports and Memoranda, No. 880. June 1923. (e. 8.) -- The lift and drag of a standard Bristol fighter aeroplane.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 482-483 diagrs., tabl.

Reports and Memoranda, No. 897. November 1923. (Ae. 127.)

- Lift and drag of standard Bristol fighter with R. A. F. 4D engine. Comparative full scale and model tests.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 477-481, diag rs. tabls.

Reports and Memoranda, No. 896. November 1923. (Ae. 126.)

- Lift and drag of the Bristol fighter with wings of three aspect ratios.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 409-431, ills, diagrs., tabls. Parts 1-p. Reports and Memoranda, No. 859. April 1923. (Ae. 99.)

- Report of the design panel on the scale effect on lift, drag, and centre of

pressure of complete aeroplanes.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 507-527, diagrs., tabls.

Reports and Memoranda, No. 900. March 1924. (Ae. 130.)

- Tests of R. A. E. gear-wheel type petrol pump.

Aeronautics. Techn. Rep. Aer. Res. Co m., 1923-24, Vol. 2, London, 1925, pp. 601-608, ills, diagrs.

Reports and Memoranda, No. 877.

Rudder. See Budig, Friedrich: Bericht über Versuche und Druckmessungen an Querrudern im Fluge.

Rudder control. See Stevens, H. L.: Full-scale tests of a Bristol fighter with increased rudder control.

Ruhl, A. Birds of the night mail.

Colliers, Vol. 75 (Mar. 7, 1925), Springfield, O., pp. 14-15, 111.

Rumpler. The 1,000-horsepower Rumpler aircraft engine.

Automobile Engineer, Vol. 15, No. 203 (June 1925), London, pp. 170-175, ill.

Rumpler, E. Das trans-ozeanflugzeug.

Berichte und Abbandlungen der Wissenschaftlichen Gesellschaft für Luftfahrt, 14 Heft, dicembre 1925, Oldenbourg, München-Barlin.

Russia. Gliding activities in Russia.

Aviation, Vol. 18, No. 8 (Feb. 23, 1925), New York, pp. 218-219, diagr.

- On the new Russian leader.

The Aeroplane, Vol. 28, No. 6 (Feb. 11, 1925), London, pp. 127-128.

- Le vol à voile en Russie.

L'Aéronautique, 7ma année, No. 68 (Jan. 1925), Paris, pp. 35-36, ill.

- See Gliders: Glider competitions in Russia.

- See Scherschevsky, A.: Das erste russische Ganzmetallflugzeug.

Russia. See Scherschévsky, A.: Der zweite allrussische Segelflugwettbewerb 1924.

- See Strelecki, Jean de: Russia's air force is growing.

Russo-Japanese treaty. On the Russo-Japanese treaty.

The Aeroplane, Vol. 28, No. 9 (Mar. 4, 1925), London, pp. 193-194.

Rutherford, J. T. See Weeks, W. S., and J. T. Rutherford: A table for determining drop in pressure in airways.

Rynine, N. Graphique du travail d'un aérodrome.

L'Aéronautique, 7me annéa, No. 76 (sept. 1925), Paris, pp. 354-356, graphs.

S

S. E. 5A. See Irving, H. B., and A. S. Batson: On the effect of sideslip on the aerodynamic forces and moments (including those due to the controls) for a model S. E. 5A aeroplane.

- See Reif, E. F. : The lateral stability of S. E. 5a in gliding flight.

S. H. L'aviation française en 1924.

L'Aérophile, 33e année, Nos. 11-12 (ler-15 juin 1925), Paris, pp. 176-180, ill.

Sabatier, J. Les essais statiques et les calculs de résistance des avions.

L'Aérotechnique, (L'Aéronautique, 7me année, No. 76), 3me année. Num. 33 (sept. 19 25), Paris, ppi 335-339.

Sadron, Ch. See Bouligand, G, Une méthode approchée pour étudier le mouvement de certains anneaux tourbillonnaires.

Safety. On imperial safety.

The Aeroplane, Vol. 28, Nos. 14,15,19 (Apr. 8,15, May 13,1925), London, pp. 325-328,349-350, 453-454.

- On safety first.

The Aeroplane, Vol. 28, Nos. 10-11 (Mar. 11-18,1925), London, pp. 217-222, 256, 258.

- On the safety-first tests.

The Aeroplane, Vol. 28, No. 16 (Apr. 22, 1925), London, pp. 373-378, ill.

- See Beyne, J.: La protection de l'aviateur contre les effects mécaniques de

l'accident d'aviation.

- See Savage-Bramson : An anti-Stall safety device.

Safety code. Aeronautic safety code. Tentative American standard. Sponsors: Bureau of Standards, Society of Automotive Engineers, Inc. Approved by the American Engineering Standards Committee October, 1925. New York, Society of Automotive Engineers, Inc., pp. 62.

Journ. Soc. Automotive Engineers, Vol. 16, No. 1 (Jan. 1925), New York, pp. 25-28.

- Aeronautical safety code completed.

Aviation, Vol. 18, No. 22 (June 1,1925), New York, p. 600.

Journ. Soc. Automotive Engineers, Vol. 16, No. 5 (May 1925), New York, pp. 493-496.

- Standardization activities.

Journ. Soc. Automotive Engineers, Vol. 16, No. 1 (Jan. 1925), New York, pp. 25-28, ill.

-■ See Travel Air: The Travel Air special. A commercial airplane designed

in accord with the aeronautical safety code.

Safety Devices. Automatic fire extinguisher to save flyers. Popular Mechanics, Vol. 44 (July, 1925), Chicago, p. 106, ill.

Sahara. La double traversée du Sahara par l'aviation d'A. 0. F.

L'Aéronautique, 7me, année, No. 72 (mal 1925), Paris, p. 168, 111.

- See Rolland: La navigation aérienne au Sahara.

Sailing flight. SeeAlayrac: Quelques précisions sur le vol sans moteur.

- See Alayrac, J.: L'effet Katzmayr et son utilisation pour le vol sans

moteur.

- See Brequet, Louis: Vol à voile dynnamique des oiseaux.

- See Raethjen, P.: Flugeigenschaftsbestimmungen an Segelflugzeugen.

Saint-Raphaël. Le concours des avions marins de Saint-Raphaël.

L'Aéronautique, 7me année, No. 74 (juil, 1925), Paris, pp. 244-247, ill.

Sainte-Lagtje, A. See Huguenard, E., et A. Sainte-Lague: Le calcul des trajectoires des avions voiliers avec application au vol à voile dynamique.

Salmson. See Marchand, Jean: La solution de M. Louis Damblanc au problème de l'aviation aux hautes altitudes.

Samson, C. R. The operation of flying boats in the Mediterranean.

Journ. Roy. Aer. Soc., Vol. 29, No. 171 (Mar. 1925), London, pp. 114-131.

San Francisco. Inaugurating an airplane taxi service in San Francisco.

Current Opinion, Vol. 78 (April 1925), New York, p. 469.

- The San Francisco-Honolulu flight. The missing P. N. 9 flying boat

found.

Flight, Vol. 17, No. 38 (Sept. 17,1926), London, pp. 596-597, ill.

Sand test. See Avia: The Avia B. H. 17 biplane sand tested. Sandel. Zur Aerodynamik des MagnuseSektes.

Zeitschr. Ver. deutsch. Ing., Bd. 69, Nr. 21 (23. Mai 1925), Berlin, pp. 726-729, ill.

Sandiper, Thaddetjs Nelson. Navy aircraft to solve riddles of the Arctic.

U. S. Air Services, Vol. 10, No. 6. (June 1925), Washington, pp. 17-20, ill.

- The reliability tour—A mile stone in American aviation.

U. S. Air Services, Vol. 10, No. 11 (Nov. 1925), Washington, pp. 11-15, ill.

SXndorfi, Kamill. A legi közlekedes Joga.

Selhstverlag, pp. iiv, 290.

Sanitation. See A. G.: L'aviation sanitaire au Val-de-Grâce et au Bourget. --See A. G. : Une exposition d'aviation sanitaire.

__See Julliot, Ch.-L.: Les aéronefs sanitaires et l'emblème de la Croix-Rouge.

Santé da Rios, L. See Rios, L. Santé da: Elica sostentatrice ad anello. Saratoga. The aircraft carrier Saratoga launched.

. Aviation, Vol. 18, No. 16 (Apr. 20, 1925), New York, pp. 434-435.

- Our airplane carrier "Saratoga" launched.

U. S. Air Services, Vol. 10, No. 5 (May 1925), Washington, p. 31, ill.

-- Ours is the largest airplane carrier. U. S. S. Saratoga is now afloat.

Aero Digest, Vol. 6, No. 5 (May 1925), New York, pp. 251-252, ill.

- Saratoga launched soon.

Aviation, Vol. 18, No. 14 (Apr. 6, 1925), New York, p. 389, ill.

--See Airplane carrier: Our first big plane carrier.

Sargent, John G. See License: Cross license agreement upheld. Attorney General Sargent renders important opinion.

Sarignt, Rene de. South Africa's air mail.

Aero Digest, Vol. 6, No. 6 (Jane 1925), New York, pp. 313-314, ill.

Savage-Bramson. An antistall safety device.

Aviation, Vol. 19, No. 15 (Oct. 12, 1925), New York, pp. 495-496, ill., diagr.

- The Savage-Bramson antistall gear. A new device with great possibilities.

Flight, Vol. 17, No. 33 (Aug. 13, 1925), London, pp. 526-527, ill.

- The Savage-Bramson antistall gear in practice.

The Aeroplane, Vol. 29, Nos. 8-9 (Aug. 19-26, 1925), London, pp. 234, 268, dlagr.

Savoia. The Savoia S. 52 and S. 58 battle planes.

Flight, Vol. 17, No. 30 (July 23, 1925), London, pp. 463-466, ill., diagr.

- The Savoia torpedo flying boat.

Aviation, Vol. 18, No. 5 (Feh. 2, 1925), New York, p. 131, diagr

- Three "Savoia" seaplanes.

Flight, Vol. 17, No. 15 (Apr. 9, 1925), London, pp. 212-215, ill., diagr.

Saters, W. H. Aircraft development policy for military purposes. The Aeroplane, Vol. 28, No. 22 (June 3, 1925), London, pp. 544, 546.

- Lessons of 1924.

Institutions of Aeronautical Engineers, Minutes of Proceedings No. 15, 8th May 1925, London, pp. 27-34.

- The production of aircraft on a war scale.

The Aeroplane, Vol. 28, No. 20 (May 20, 1925), London, pp. 492-496.

- Progress at the pageant.

The Aeroplane, Vol. 29, No. 1 (July 1, 1925), London, pp. 24, 26. Royal Air Force Display.

--Some technical notes on the auto-giro.

The Aeroplane, Vol. 29, No. 17 (Oct. 21, 1925), London, pp. 467-470.

Scadta. Growth of the Scadta. A financially sound commercial air transportation company.

Aviation, Vol. 19 No. 26 (Dec. 28, 1925), New York, pp. 913-914.

Scaife, H. L. Aircraft monopoly.

Nation, Vol. 121, (Dec. 16, 1925), New York, pp. e97-699.

- Whitewashing the air grafters.

Nation, Vol. 121, (Dec. 30, 1925), New York, pp. 753-756.

Scammell, J. M. Some lessons from the recent uses of aircraft in minor warfare. u. S. Air Services, Vol. 10, No. 4, 7 (April, July 1925) Washington, pp. 23-27, 32-35.

Scarborough, James B. Some problems on the lift and rolling moment of airplane wings.

National Advisory Committee for Aeronautics, Report No. 200, May 16, 1925, Washington, Government Printing Office, 1925, pp. 16, ill.

Scheepmaker, J. P. Wat de Marine-Luchtvaartdienst in Indie alzoo doet. Het Vliegveld, 9 de Jaarg., No. 12 (Dec. 1925), Amsterdam, pp. 310-317, HI.

Scherschevskt, A. Das erste russische Ganzmetallflugzeug.

Zeitschr. Flugt. Mot., 16. Jahrg., 10. Heft (23. Mai 1925), München, pp. 205-206.

- Der zweite allrussische Segelflugwettbewerb 1924.

Zeitschr. Flugt. Mot., 16. Jahrg., 7.8. Heft (14.28 April 1925), München, pp. 157-159,170-172, ill.

Scherz, W. In three days to America; trip of the ZR-3.

Living Age, Vol. 326, (Aug. 15, 1925), Boston, pp. 347-350.

Scheubel, P. N. Quermomente und Kursmomente eines Tragflügels im geraden Flug. .

Zeitschr. Flugt. Mot., 16. Jahrg., 7. Heft (14. April 1925), München, pp. 152-156, ill.

Scheve, G. V. Bericht über den Verlauf der XIV. Ordentlichen Mitgliederversammlung der Wissenschaftlichen Gesellschaft für Luftfahrt (WGL) vom. 9. bis 12. September 1925 in München.

Zeitschr. Flugt. Mot., 16. Jahrg., 19. Heft (14. Okt. 1925), München, pp.. 399-407.

Schick, M. Biding the rainbow trail.

Sunset, Vol. 54 (May 1925), San Francisco, pp. 10-11, ill.

Schieferstein, H. Resonanzflug.

Zeitschr. Flugt. Mot., 16. Jahrg., 5. Heft (14. März 1925), München, pp. 115-116.

Schilhansl. Fragen der neueren Turbinentheorie.

Zeitschr. Ver. deutsch. Ing., Bd. 69, Nr. 23 (6 Juni 1925), Berlin, pp. 729-763, ill.

Schilowsky, P. The gyroscope. Practical construction and application.

London, E. and F. N. Spon.

Schiske. See Praetorius, K. R.: The problem of fuel measurement (The Schiske "Konsummeter.")

Schleicher, Rüdiger. Internationales luftfahrtrecht.

Wörterbush des Volker, rechts und der Diplomatie, Berlin und Leipzig.

Schlink, W. Die Lehren des Rhön-Wettbewerbes 1925 für die Zukunft.

Zeitschr. Flugt. Mot., 16. Jahrg., 21. Heft (14. Nov. 1925), München, pp. 449-451.

Schmauss. Die Deutsche Verkehrsausstellung Raum 8. Meteorologie.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9. Sept. 1925), München, pp. 358-360, ill.

ScHMAuss, A., und P. Zistler. Die Deutsche Verkehrsausstellung Raum 4. Navigation.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9. Sept. 1925), München, pp. 335-337, ill.

Schneider. The Schneider bombardment escort plane.

Aviation, Vol. 18, No. 8 (Feb. 23, 1925), New York, pp. 211-212, ill.

Schneider, F. Dragged by a Zeppelin.

Living age, Vol. 325 (June 20, 1925), Boston, pp. 637-641.

Schneider, Jacques P. See Blanchet, Georges: Aviateurs contemporains. Jacques P. Schneider.

Schneider, Karl. See Poeschel, Johannes: Einführung in die Luftfahrt . . .

Schneider Cup. America wins Schneider race.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, pp. 602-603, 634, ill.

- British Schneider Cup entry.

Aviation, Vol. 19, No. 12 (Sept. 21, 1925), New York, pp. 35S-359, ÜL

- The British Schneider Cup team sails for America.

Flight, Vol. 17, No. 40 (Oct. 1, 1925), London, pp. 641-642, ill.

- The course of the Schneider Cup race.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, p. 590, map.

- The greatest seaplane contest. The Jacques Schneider Cup won for the

second time by United States.

Aviation, Vol. 19, No. 18 (Nov. 2, 1925), New York, pp. 620-628, ill.

- History of the Schneider trophy race.

Flight, Vol. 17, No. 45 (Nov. 5, 1925), London, pp. 720-732, ill.

- The Jacques Schneider Cup Race for 1925.

National Aeronautic Association Review, Vol. 3, No. 10 (Oct. 1925)', Washington, D. C, p. 157.

- Jacques Schneider seaplane trophy race.

National Aeronautic Association Review, Vol. 3, No. 11 (Nov. 1925), Washington, D. C, pp. 171-172, 173-176.

Schneider Cup. The 1925 Schneider trophy race.

Flight, Vol. 17, Nos. 44, 46 (Oct. Nov. 12, 1925), Loudon, pp. 703, 747-752.

- The 1926 Schneider trophy contest.

The Aeroplano, Vol. 29, No. 21 (Nov. 18, 1925), London, p. .1S8, 111.

- On the psychological moment.

The Aeroplane, Vol. 29, No. 18 (Oct. 25, 1925). London, pp. 493-498.

- On the Schneider trophy competition.

The Aeroplane, Vol. 29, No. 13 (Sept. 23, 1925), London, pp. 357-364, ill.

- The Schneider contest and after.

The Aeroplane, Vol. 29, No. 20 (Nov. 11, 1925), London, pp. 562, 564.

- The Schneider Cup race.

Flight, Vol. 17, No. 43 (Oct. 22,1925), London, pp. 688-692, ill., map.

- De Schneider cup race.

Het Vliegveld, 9de Jaarg., No. 11 (Nov. 1925), Amsterdam, pp. 288-290, ill.

- The Schneider Cup seaplane race.

Aviation, Vol. 19, No. 16 (Oct. 19, 1925), New York, pp. 547-551, ill. Flight. Vol. 17, No. 39 (Sept. 24, 1925), London, pp. 609-614, ill.

- The Schneider trophy contest.

The Aeroplane, Vol. 29, No. 18 (Oct. 28, 1925)i London, pp. 600, 502.

- Secrecy and the Schneider trophy contest.

The Aeroplane, Vol. 29, No. 19 (Nov. 4, 1925), London, pp. 528-530.

- The United States Schneider Cup entrants.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, p. 589, 111.

- See Coleman, Charles H.: Defending the Schneider Cup.

- See Garber, Paul Edward: Army flyer first in Schneider trophy races.

Schools. Falling a mile for a diploma.

Popular Mechanics, Vol. 43 (May 1925), Chicago, pp. 714-717, ill. Literary Digest, Vol. 86 (July 11,1925), New York, p. 24.

- To produce officers who can fly.

Literary Digest, Vol. 85 (May 23, 1925), New York, pp. 9-10.

- Teaching the young idea. Aviation lectures and flights for public schools.

Flight, Vol. 17, No. 49 (Dec. 3,1925), London, p. 793.

- See Avis: Some "Avis" school monoplanes.

- See Blackburn: The Blackburn flying school.

- See Feiro: The Feiro "Dongo." A Hungarian school machine of unorthodox design.

- See Haack, Herbert: Ein Gang durch die Fliegerschule in Gersfeld (Röhn).

- See Rienau, Rudolf: Die Schule des Fliegens.

Schreve, G. v. Internationaler Flugwettbewerb München.

Zeitschr. Flugt. Mot., 16 Jahrg., 19. Helt (14. Okt. 1925), München, pp. 408-410.

Schroeder, R. W. How safe is an airplane?

Popular Mechanics, Vol. 43 (April 1925), Chicago, pp. 535-536, ill.

Schubert, R. Bericht über die IX. internationale Luftfahrzeug-Ausstellung in Paris.

Zeitschr. Flugt. Mot., 16. Jahrg., 2. Heft (28. Jan. 1925), München, pp. 21-23, ill.

Schuette-Lanz. See Endras, C: Die Lieferung der Gaszellen und Aussen-hüllen-Stoffe für die SL-Luftschiffe von 1910-1918.

- See Weiss, Georg: Schütte-Lanz airship projects after the war.

Schütte-Lanz Airship Company. See Gentzoke: Structural methods employed by the Schütte-Lanz Airship Company.

Schulte, F. See Tausz, J., and F. Schulte: Determination of ignition points of liquid fuels under pressure.

Schut, W. F. H. Over de kortste verbinding tusschen twee plaatsen op aarde en de toepassing daarvan bij wereldvluchten.

Het Vliagveld, 9da Jaarg., Nos. 8-9 (August-Saptember 1925), Amsterdam, pp. 204-206, 226-229, ill., map.

Scintilla magneto. The Scintilla magneto for aircraft engines.

Aviation, Vol. 18, No. 11 (Mar. 16, 1925), New York, pp. 294-295, ill.

Scott, C. W. See Kemp, R. C, C. G. Lewis, C. W. Scott, and C. R. Robbins: Aerophoto survey and mapping of the forests of the Irrawaddy Delta.

Scott, Paul P. Flying the night mail.

National Aeronautic Association Reviaw, Vol. 3, No. 2 (Feb. 1925), Washington, D. C~!, pp. 22-23, ill.

- Miraculous adventure of an air-mail pilot. Paul P. Scott crashes into

mountain at 8,000 feet and lives to tell the tale.

Aviation, Vol. 18, No. 5 (Feb. 2, 1925), New York, p. 132.

Scott, Wisneb Gillette. Christofferson's flight over Mt. Whitney.

Tha Ace, Vol. 7, No. 1 (Aug. 1925), Glendala, Calif., pp. 5-6,13.

- Highway air landings. Requirements of a standardized field.

Tha Aca, Vol. 6, No. 2 (July 1925), Glendala, Calif., pp. 5-6. diagr.

- A suggestion for first-aid aircraft for reforestation of fire-scourged regions.

The Ace, Vol. 7, No. 2 (Sapt. 1925), Glendala, Calif., pp. 5-6.

Scratches. See Thomas, W. Norman: The effect of scratches and of various workshop finishes upon the fatigue strength of steel.

Seaplanes. Aerodynamics. Seaplanes.

Aeronautics Techn. Bap. Aer. Ees. Com., 1923-24, Vol. 1, London, 1925, pp. 25-27.

- Making a seaplane self-contained.

Scientific American, Vol. 133 (July 1925), New York, pp. 60-61, ill.

- The pioneers of seaplanes.

The Aeroplane, Vol. 28, No. 21 (May 27, 1925), London, pp. 516-520, ill.

- Super seaplanes.

Scientific American, Vol. 132 (Feb. 1925), New York, pp. 124-125, ill.

Searles, Frank. Europe is in the air—-America is?

Aaro Digest, Vol. 6, No. 4 (April 1925), New York, pp. 197-198, 228, ill.

Seilkopf, Heinrich. Meteorologische Studienfahrten über den Atlantik und die meteorologische Beratung transatlantischen Luftverkehrs.

Zcitschr. Flugt. Mot., 16. Jahrg., 11. Heft (13. Juni 1925), München, pp. 219-221.

- Uber Luftverkehrsunfalle.

Zeitschr. Flugt. Mot., 16. Jahrg., 10. Heft (28. Mai 1925), München, pp. 204-205.

- Die Wetterberatung der Amerikafahrt des LZ 126.

Zeitschr. Flugt, Mot., 16. Jahrg., 6. Heft (28. März 1925), München, pp. 131-135, maps.

Sen, Sachindra Nath. Surface and geostrophic wind components at Deerness, Holyhead, Great Yarmouth, and Scilly.

Air Ministry, Meteorological Office, Geophysical Mamoirs, No. 25, Fifth number of Volume III, London, His Majesty's Stationary Office, 1925, pp. 167-178, diagrs.

Serck. Serck radiators.

Flight, Vol, 17, No. 10 (Mar. 5, 1925), London, p. 136, ill.

Resquicentennial Exposition. See Philadelphia: Philadelphia Sesquicentcn-nial Exposition.

Setmouh. L. D. Aerial life belts.

Aero Digest, Vol. 6, No. 6 (June 1926), New York, pp. 305-307, ill.

- Come on, come on, America.

National Aeronautic Association Review, Vol. 3, No. 10 (Oct. 1925), Washington, D. C, pp. 152-154.

- Comparison of principal pursuit planes.

National Aeronautic Association Reviow, Vol.3,No.2(Feh. 1925), Washington,D.C,p. 27.

- Engine characteristics and performance form.

National Aeronautic Association Review, Vol. 3, No. 7 (July 1925), Washington, D. C, p. 93.

Sezawa, Katstjtada. A method of analysis of fluid resistance composed of friction and pressure.

"Zatsuroku" ot Aeronautical Research Institute, Tokyo Imperial University, No. 6 and 1924. pp. 35-38, 21-25, ill.

- On the free vibration of a metallic plate fixed at four edges.

"Zatsuroku" of Aeronautical Research Institute, Tokyo Imperial University, No. 6, 1924 pp. 39-42, ill.

- On the vibration of aeroplane wings.

"Zatsuroku" of Aeronautical Research Institute, Tokyo Imperial University, No. 6, 1924 pp. 43-45, ill.

- Relation between the resistance and the directional stability of an airship.

"Zatsuroku" of Aeronautical Research Institute, Tokyo Imperial University, No. 6, 1924 pp. 32-34, ill.

Shafts. See Gough, H. J.: The effect of keyways upon the strength and stiffness of shafts subjected to tortional stresses.

Shaw, B. Russell. Ballooning and its history. ■

National Aeronautic Association Review, Vol. 3, Nos. 3, 4 (March, April 1925), Washington, D. C, pp. 34-36, 59-60, 63.

- The national air races.

National Aeronautic Association Review, Vol. 3, Nos. 9, 11 (Sept.-Nov. 1925), Washington D. C, pp. 137-138, 165-171, ill.

Shaw, Napier. The physical structure of the atmosphere regarded from dynamical point of view.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 161-172.

Shenandoah. La catastrophe du "Shenandoah."

L'Aéronautique, 7me année, No. 77 (oct. 1925), Paris, p. 392, ill.

- Disaster to the Shenandoah.

Science, Vol. 62, sup. 14 (Sept. 11, 1925), Garrison, N. Y.

——■ Human side of the Shenandoah disaster.

Literary Digest, Vol. 86 (Sept. 26, 1925), New York, pp. 36-18, ill.

- The Navy loses the "Shenandoah."

TJ. S. Air Services, Vol. 10, No. 10 (Oct. 1925), Washington, pp. 37-39.

- On the loss of the Shenandoah.

The Aeroplane, Vol. 29, No. 11 (Sept. 9, 1925), London, pp. 305-307, ill.

- No turning back in America's conquest of the air.

Literary Digest, Vol. 86, No. 12 (Sept. 19,1925), New York, pp. 5-8, ill.

- The "Shenandoah" disaster.

Flight, Vol. 17, No. 37 (Sept. 10, 1925), London, p. 580, ill.

Shenandoah. The Shenandoah investigation.

Aviation, Vol. 19, No. 14 (Oct. 5,1925), New York, pp. 437-438.

- A "twister" wrecks the Shenandoah.

Aviation, Vol. 19, No. 11 (Sept. 14, 1925), New York, pp. 310-314, ill.

- What happened to the Shenandoah?

Popular Mechanics, Vol. 44 (Nov., 1925), Chicago, pp. 711-717, ill., diagr.

- Why the Shenandoah failed.

Aviation, Vol. 19, No. 12 (Sept. 21, 1925), New York, pp. 346-349.

- See Cabot, Godfrey L.: Lessons of the Shenandoah.

- See Driggs, L. L. : Daughter of the stars! Destruction of the Shenandoah.

- See Lemoine, Jean: La destruction du "Shenandoah."

- See Moore, S. T.: Lesson of the Shenandoah.

- See Moses, S. E. : Life on the Shenandoah.

- See Tuckerman, Louis Bryant, and C. S. Aitchison: An analysis of the

deformation of the mooring spindle of the "Shenandoah."

- See Walker, J. B.: Tragedy of the Shenandoah.

- See Zahm, Albert Francis, R. H. Smith, and F. A. Louden: Air forces,

moments and damping on model of fleet airship Shenandoah.

Sherman, W. C. Changes in air tactics since the World War.

V. S. Air Services, Vol. 10. No. 2 (Feb., 1925), Washington, pp. 21-25.

Ship waves. See Hogner, Einar: Contribution to the theory of ship waves.

Shock absorbers. See Flying boats: Shock absorbers for flying boats.

Shoemaker, Gilbert A. Lessons in parachute jumping. How and why it is done.

Slipstream, Vol. 6, No. 2 (Feb. 1925), Dayton, Ohio, pp. 7-10, ill.

Short Brothers. Short Brothers' experimental department.

The Aeroplane, Vol. 29, No. 2 (July 8, 1925), London, pp. 68, 70, ill.

Siam. L'aviation sanitaire au Siam.

L'Aéronautique, 7me année, No. 71 (avril 1925), Paris, pp. 126-127, ill.

Siddeley, J. D. Reliability of aircraft engines.

Journ. Roy. Aer. Soc, Vol. 29, No. 171 (Mar., 1925), London, pp. 132-140.

Sideslip. See Irving, H. B., and A. S. Batson: On the effect of sideslip on the aerodynamic forces and moments (including those due to the controls) for a model S. E. 5A aeroplane.

Sidorin, I. I. The investigation of colchugaluminium.

Transactions of the Central Areo-Hydrodynamical Institute, No. 15. TJ. S. S. R. Scientific-Technical Department of the Supreme Council of National Economy, No. 98, Moscow, 1925, pp. 48, ill.

- The investigation of colchugaluminium section.

Scientific Technical Department of the Supremo Council of National Economy No. 99. Transactions of the Central Aoro-Hydrodynamical Institute No. 16, Moscow, 1925, pp. 56, tabls., diagrs.

Sikorsky. Products of the Sikorsky Manufacturing Corporation. Aviation, Vol. 19, No. 14 (Oct. 5, 1925), Now York, pp. 439-440, ill.

- The Sikorsky S29A commercial biplane.

Flight, Vol, 17, No. 20 (May 14, 1925), London, pp. 285-286, ill.

Sikorsky. The Sikorsky S29A twin-engined transport plane.

Aviation, Vol. 18, No. 7 (Feb. 16, 1925), New York, pp. 182-184, 111.

- See Hartney, Harold E.: Sikorsky air transport.

Sikorsky, I. What can aircraft do in the next war?

Independent, Vol. 115 (Nov. 7, 1925), New York, pp. 521-523, ill.

Silsbbb, F. B. The sparking voltage of spark plugs.

National Advisory Committee for Aeronautics, Report No. 202, Fab. 17, 1925, Washington, Government Printing Office, 1925, pp. 16, ill.

Silver spruce. See Smith, H. T. Wood: The testing of silver spruce.

Simmonds, O. E. Recent progress in flying-boat design.

Flight, Vol. 17, No. 37 (Sept. 10, 1925), London, pp. 583-586, ill.

Journ. Roy. Aer. Soc, Vnl. 29, No. 180 (Dec. 1925), London, pp. 634-647, ill.

Simmons, L. F. G. and E. Ower. Elimination of the static pressure gradient along wind tunnels of the N. P. L. type.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 523-534, ill., diagrs., tabls.

Reports and Memoranda, No. 873. June 1923. (Ae. 109.)

Simmons, L. F. G., and F. C. Johansen. Experiments on the transmission of air waves through pipes.

Aeronautical Research Committee, Reports and Memoranda, No. 957 (Ae. 176.), January 1925, London, 1925, pp. 13, ills., tabls., diagrs.

--On the transmission of air waves through pipes.

London, Edinburgh and Dublin Philosophical Magazine and Journal of Science, Vol. 50, No. 297. (Sept. 1925), London, pp. 553-570, diagrs.

Simmons, L. F. G. See Fage, A., and L. F. G. Simmons: An investigation of the air flow pattern in the wake of an airfoil of finite span.

Simmons, L. F. G., and E. Ower. An investigation of the downwash in the slipstream (Part I). With appendix by H. Glauert.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 289-302, ill. diagrs. Reports and Memoranda, No. 882. February 1924. (Ae. 113.)

- An investigation of the influence of downwash on the rotary derivative

Mq. Part II. The effect of the air screw slipstream.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 303-312 diagrs., tabls. Reports and Memoranda, No. 883. September 1923. (Ae. 114.)

—Test on a large aerofoil of R. A. F. 15 section.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 161-168, Ills., diagrs., tabls.

Simmons, W. H., and F. C. Sutton. Measurement of the rate of flow of fluids by the Rotameter.

Industrial Chemist and Chemical Manufacturing, Vol. 1, No. 10 (Nov. 1925), London, pp. 473-474, ill.

Simpson, B. W. Bombing accuracy.

Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, pp. 393-396, ill.

Simpson, G. C. Thunderstorms and aviation.

Journ. Roy. Aer. Soc, Vol. 29, No. 169 (J3n. 1925), London, pp. 24-46, ill. Reviewed in: L'Aérotechnique (L'Aéronautique, 7me année, No. 74), 3me 3anée, Num. 31, (juil. 1925), Paris, pp. 265-260, ill.

Sims. See Fullam, W. F.: Admiral Sims.say s aircraft dooms battleships.

Sinclair, D. Civil aviation wireless.

Wireless World, Vol. 17, No. 17 (Oct. 21, 1925), London, pp. 545-549, ill.

Skan, Sylvia W. See Cowley, W. L., A. G. Gadd, L. J. Jones, and Sylvia W. Skan: Biplane investigation with R. A. F. 15 section. Part III. Tests at various staggers and gap chord ratios.

Skin friction. See Bairstow, L.: Skin friction.

- See Kempf, G.: Ueber den Reibungswiderstand von Flächen verschiedener

Form.

- See Kerston, J. H. W.: To shape the auto like a fish.

Sky writing. See Brookley, W. H.: Sky writing.

Slate. See Harrison, George B.: The Slate rigid airship.

Slipstream. See Simmons, L. F. G., and E. Ower: An investigation of the downwash in the slipstream. (Part I.) With appendix by H. Glauert.

Sloane. See Bradfield, F. B., and A. S. Hartshorn: Test of three aerofoils suitable for high speed. A. D. 1, Sloane, and R. A. F. 26.

Slosson, E. E. Commercial aviation.

Scientific Monthly, Vol. 21 (Nov. 1925), Garrison, N. Y., pp. 555-557.

Slotted wings. See Bradfield, F. B.: On the use of a slotted trailing flap on aerofoils of various cambers.

--See Lachmann, G.: Results of recent experiments with slotted wings.

Small, A. R. National air policy suggestions.

Aviation, Vol. 18, No. 1 (Jan. 5, 1925), New York, p. 20.

Smith. Smith's gyro turn indicator.

Flight, Vol. 17, No. 25 (June 18, 1925), London, p. 377, HI.

Smith, George Otis. Geological Survey in the air.

National Aeronautic Association Eeview, Vol. 3, No. 5 (May 1925), Washington, D. C, pp. 74-75.

Smith, H. T. Wood. The testing of silver spruce.

The Aeroplane, Vol. 28, No. 5 (Feb. 4,1925), London, p. 108.

Smith, R. H. See Zahm, Albert Francis, R. H. Smith, and F. A. Louden: Air forces, moments, and damping on model of fleet airship Shenandoah.

Smith, William B. Community aviation.

Aviation, Vol. 19, No. 12 (Sept. 21, 1925), New York, p. 356.

Smithsonian Institution. See Walcott, Charles Doolittle: Smithsonian—A pioneer in aeronautics.

Smoke screens. Smoke screens dropping from the sky.

Literary Digest, Vol. 86, No. 5 (Aug. 1, 1925), New York, pp. 22-23, ill.

Snijders, C. J. De toekomst van het luchtverkeer met Nederlandsch-Indie.

Mededeelingen, Bijvoegsel van Het Vliegveld, 9de Jearg., No. 12, No. 1 (15 Dec. 1925), Amsterdam, pp. 4-11, ill.

Soaring flight. See Dubois, Paul, und Wolfgang Kaempfert: Flugbahnen und Stromfeld im Luv.

- See Fick, Roderich: Relation of "Lilienthal effect" to dynamic soaring

flight.

- See Kölzer: Die Windverhältnisse im Scgelfluggelände in den Stöllner

Bergen bei Rhinow.

- See Koschmieder, Harald: Zur Kenntnis des Stromfeldes in Lee.

- See Raethjen, P.: Flugeigenschaftsbestimmungen an Segelflugzeugen.

- See Russia: Le vol ä voile en Russie.

Society of Automotive Engineers. See Safety Code: Aeronautic safety code. Tentative American standard.

Solberg, H., et Carl Stürmer. Methode pour la mesure photogrammétrique des nuages pendant la nuit, quand des nuages sont éclairés par la lune ou par la lumière crépusculaire.

Geofysiske Publikationer Vol. 3, No. 12. TJtgit av det Morske Videnskeps-Akadenie i Oslo, 1925, pp. 21, ill.

Solberg, H. Zum Turbulenzproblem.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 387-394.

Solex prize. Farman wins Solex prize.

Aviation, Vol. 18, No. 19 (May 11, 1925), New York. p. 520.

Sollas, WÏ J. See Binney, George: With seaplane and sledge in the arctic. Preface by W. J. Sollas.

South Africa. Flying in South Africa.

The Aeroplane, Vol. 28, No. 18 (May 6, 1925), London, pp. 436,43S.

- See Sarigny, René de: South Africa's air mail.

South America. See Carlin, J. L.: A new air mail. 1,000-mile coastal route in South America.

- See Collins, F. A.: Over South America. A commercial air route of rare

beauty.

Southwell, R. V. Some aeronautical problems of the past and the future.

Flight, Vol. 17, No. 37 (Sept. 10, 1925), London, p. 583.

- Some recent work of the aerodynamics department National Physical

Laboratory.

Journ. Hoy. Aer. Soc, Vol. 29, No. 172 (April 1925), London, pp. 146-164 and discussion 164-167, ill.

- See Pannell, J. R. : The measurement of fluid velocity and pressure.

Edited by R. A. Frazer with foreword by R. V. Southwell.

Soviet air lines. See Asia: Soviet air lines in central Asia.

Spaight, J. M. Air power and war rights.

London, Longmans, Green & Co., 1925, pp. ix, 493.

Spain. Spanische Luftfahrtkonzessionsbedingungen.

Aut. Mot. Flug., 7. Jahrg., Nr. 2 (31. Jan. 1925), Berlin, p. 51, ill.

Spannhake, W. Anwendung der konformen Abbildung auf die Berechnung von Strömungen in Kreiselrädern.

Zeitschrift für Angewandte Mathematik und Mechanik, 1925.

Spar design. See Driggs, Ivan IL: Direct solution of airplane spar design.

- See Kirste, Léon: Calculation of wing spars of variable cross-section and

linear load.

Spark plugs. See Silsbce, F. B. : The sparking voltage of spark plugs.

Sparkes, R. B. The law relating to the air. London, Stevens and Sons.

Sparks, B. Safeguarding the airplane pilot; Government tests.

Scientific American, Vol. 133 (Sept. 1925), New York, pp. 164-165, ill.

Spabrow, Stanwood W. Aviation engine performance.

Journ. Frankl. Inst., Vol. 200, No. 6 (Dec. 1925), Philadelphia, pp. 711-730, ill.

- The effect of changes in compression ratio upon engine performance.

National Advisory Committee for Aeronautics, Heport No. 205, Mar. 13,1925, Washington, Government Printing Office, 1925, pp. 22, diagrs.

Special Aircraft Industry Committee. The special Aircraft Industry Committee. Its inception, plan, and achievements.

Aviation, Vol. 19, No. 6 (Aug. 10,1925), New York, pp. 146-147.

Speed. The attainment of high speeds.

Aviation, Vol. 19, No. 18 (Nov. 2, 1925), Naw York, p. 633.

- On punctuality and progress.

The Aeroplane, Vol. 29, No. 21 (Nov. 18, 1925), London, pp. 677-584, ill.

- Past, present, and future of airplane speeds.

Aviation, Vol. 18, No. 15 (Apr. 13, 1925), Naw York, p. 414, chart.

- Le record du monde de vitesse rentre en Prance. L'adjudant Bonnet,

sur Bernard (licence Hubert), vole à 448 kmh.

L'Aéronautique, 7ma année, No. 68 (jan. 1925), Paris, pp. 11-12, ill.

- Two hundred and fifty miles an hour.

Scientific American, Vol. 133 (Dec. 1925), Naw York, p. 372.

- What is the value of speed?

Aviation, Vol. 18, No. 18 (May 4, 1925), New York, p. 487.

- See Blanchet, Georges: Le record mondial de la vitesse.

- See Bleistein, W. : Effect of speed on economy of airship traffic.

- See Cousin: Définition et étude de la perte de vitesse au point de vue du

pilotage et au point de vue aérodynnamic.

- See Escande, L.: La similitude étendue aux grandes vitesses.

- See Stevens, H. L.: The measurement of aeroplane speed with special

reference to the use of a suspended static head.

Speed indicator. See Guiche, de: Indicateur acoustique de vitesse de M. de Guiche.

Spencer, G. K. The tri-State airway.

Aviation, Vol. 18, No. 23 (June 8, 1925), Naw York, pp. 638-639, map.

Spinning. Accidents. Spinning.

Aeronautics. Techn. Pap. Aer. Has. Com., 1923-24, Vol. 1, London, 1925, pp. 41-42.

- What is spinning?

Scientific American, Vol. 133 (Oct. 1925), Naw York, p. 277, diagr.

- See Carroll, Thomas: Spinning.

Spitzbergen. See Mittelholzer, Walter: By airplane toward the North Pole; an account of an expedition to Spitzbergen in the summer of 1923.

Spline shafts. See Wright, H. T.: Splines and serrations.

Stability. Aerodynamics. Stability and control.

Aeronautics. Tachn. Pep. Aar. Pas. Com., 1923-24, Vol. 1, London, 1925, pp. 20-23.

- Le centrage et la stabilité longitudinale (statique) des avions.

La Tachn. Aéron., 16e année, n. s., No. 45 (15 juil. 1925), Paris, pp. 198-209, ill., diagrs.

- New automatic stabilizer.

Aviation, Vol. 18, No. 1 (Jan. 5, 1925), New York, p. 20.

- See Jones, R. : On the aerodynamic characteristics of parachutes.

- See Korvin-Kroukovsky, B. V.: Stability and controllability of airplanes.

- See Le Page, W. Laurence. Note on the longitudinal stability of aeroplanes with special reference to tail-plane design.

- See Reif, E. F.: The lateral stability of S. E. 5a in gliding flight.

Stability. See Sezawa, Katsutada: Relation between the resistance and the directional stability of an airship.

- See Toussaint: Le centrage et la stability statique longitudinale des

avions.

- See Zahm, Albert Francis: Stability equations for airship hulls.

- See Zonta, Magg: Metodi radio-elettrici per la determinazione della rotta

degli aeromobili.

Stagger. See Bradfield, F. B., and L. P. Coombes: Autorotation measurements on a model aeroplane with zero stagger.

- See Cowley, W. L., A. G. Gadd, L. J. Jones and Sylvia W. Skan: Biplane

investigation with R. A. F. 15 section. Part III. Tests at various staggers and gap/chord ratios.

- See Royal Aircraft Establishment: Determination of scale effect on the

center of pressure of R. A. F. 14, B. E. 2C biplane with three values of

Stalling. An antistalling device.

The Aeroplane, Vol. 28, No. 8 (Feb. 25, 1925), London, p. 184.

- The English stalling demonstration.

Aviation, Vol. 18, No. 21 (May 25,1925), New York, p. 577, ill.

- The stalled aeroplane.

The Aeroplane, Vol. 28, No. 6 (Feb. 11, 1925), London, pp. 124, 126.

- See Bramson, M. L.: On accidental stalling.

- See Bramson, M. L.: On the prevention of accidental stalling.

- See Control; Control at stalling speed. Last week's demonstration at

-Croydon.

- See Control: The control of stalled aeroplanes.

- See Hill, R. M., and H. L. Stevens: Notes on stalled flying.

- See Meredith, F. W.: Determination of lift and drag coefficients during a

stall by means of accelerometers.

- See Savage-Bramson: An antistall safety device.

- See Savage-Bramson: The Savage-Bramson antistall gear. A new device

with great possibilities.

- See Stevens, H. L.: The control of a stalled aeroplane as affected by the

use of differential ailerons.

Stamer. Schule des Segelfliegers.

Flugzeug und Yacht, Bd. 1, Nr. 2 (Nov. 1923), Wien, p. 9, ill.

Stamps. See Brunei, Georges: AerophüatGlie.

- See Musset, Paul: Les phiatelistes au Bourget.

Stanton, T. E. The friction of pistons and piston rings.

Aeronautical Eesearch Committee, Reports and Memoranda, No. 931 (E. 12), July, 1924, London, 1925, p. 4, ill.

Star type engine. See Tanaka, Keikichi: The inertia forces and couples and their balancing of the Star-type engine.

Starr, Alva F. Leaping into space.

Aero Digest, Vol. 7, No. 6 (Dec. 1925), New York, pp. 654-655, ill.

Starters. The Aeromarine starter. This device stores energy in a flywheel which in turn is applied to the crankshaft.

Aviation, Vol. 19, No. 13 (Sept. 28, 1925), New York, pp. 391-392, ill.

- See Ash, P. T. : Building starters for aeronautical motors.

Static pressure gradient. See Simmons, L. F. G., and E. Ower: Elimination of the static pressure gradient along wind tunnels of the N. P. L. type.

Steel. Avions en acier.

L'Aérotechnique (L'Aéronautique, 7me année, No. 72), 3me année, Num. 29 (mai 1925), Paris, p. 173, ill.

- See Hatfield, W. H.: Steels used in aero work.

- See Johnson, J. B.: Welding of carbon and alloy steel tubing for aircraft.

- See Mason, W. : The effect of a temperature of 212° F. on steel submitted

to alternating torsion.

- See Thomas, W. Norman: The effect of scratches and of various workshop

finishes upon the fatigue strength of steel.

Steele, W. M. See Mosquitoes: Fighting mosquitoes with airplanes.

Stefansson, Vilhjalmt/r. Aircraft opening empire of the north. Aero Digest, Vol. 6, No. 2 (Feb.. 1925), New York, pp. 73-75.

- Arctic air routes to the Orient.

Forum, Vol. 72 (Dec. 1924), New York, pp. 721-732, map.

Steinitz, Otto. Vom Luftschiffs- zum Riesenflugzeug-propeller.

Zeitschr. Fiugt. Mot., 16. Jahrg., 6. Heft (28. März 1925), München, pp. 138-139, ill.

Stelling, D., und D. Wilcke. Die Deutsche Verkehrsausstellung. Raum 4. Luftschiffe.

Zeitschr. Flugt. Mot., 16. Jahrg., 17. u. 18. Heft (9. Sept. 1925), München, pp. 333-335, ill.

Stern, W. J. See Moss, H., and W. J. Stern: Phase setting of engine indicators.

Stetjart, William M. Department of Commerce in Aeronautics. Bureau of the Census.

National Aeronautic Association Review, Vol. 3, No. 3 (Mar. 1925), Washington, D. C, p. 42.

Stevens, A. W. See Hinton, Walter, and A. W. Stevens: Amazon flyers survive jungle crash.

Stevens, H. L. The control of a stalled aeroplane as affected by the use of differential ailerons.

Aeronautical Research Committee, Reports and Memoranda, No. 964 (Ae. 180), Nov. 1924, London, 1925, pp. 5, ill., diagrs.

- Full scale tests of a Bristol fighter with increased rudder control. .

Aeronautical Research Committee, Reports and Memoranda, No. 972 (Ae. 1S7), Apr. 1925, London, 1925, pp. 2, ill.

- Full scale tests of a new slot-and-aileron lateral control.

Aeronautical Research Committee, Reports and Memoranda, No. 968 (Ae. 184), Mar. 1925, London, 1925, pp. 3, ill., diagrs.

- The measurement of aeroplane speed with special reference to the use of

a suspended static head.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, pp. 273-288, ills., tabls. Reports and Memoranda, No. 854. Oct. 1922. (Ac. 94.)

- Variation of engine power with height.

Aeronautical Research Committee, Reports and Memoranda, No. 960 (E. 13), Aug. 1924, London, 1925, pp. 8, tabls., diagrs.

Stevens, H. L. See Hill, R. M., and H. L. Stevens: Notes on stalled flying.

- See Jones, D. A., and H. L. Stevens: The Royal Aircraft Establishment

control movement recorder, Mark III.

"Stewart." Formation flying.

Aero Digest, Vol. 6, No. 2 (Feb. 1925), New York, p. 91, ill.

- The Immelman turn.

Aero Digest, Vol. 8, No. 1 (Jan. 1925), New York, p. 34, ill.

Stewart, C. D. The measurement of upper wind velocities by observations of artificial clouds.

Air Ministry. Meteorological Office. Professional Notes, Vol. 3, No. 38 (M. O. 245r.) London, 1925, pp. 183-197, ill., tabls.

Stewart, Donald Ramsat. See Desert: An air tragedy of the desert.

Stewart, J. The "Cirrus" low-powered engine.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, p. 374, ill.

Stewart, J. A. A new propeller idea.

Aero Digest, Vol. 6, No. 2 (Feb. 1925), New York, p. 96.

Stewart, Oliver. The strategy and tactics of air fighting; with introduction by W. G. Barker.

London, Longmans, Green and Co., 1925, pp. 195.

Stockholm. See Or.: Danzig-Stockholm.

Stout. <See Ford, Henry: Ford acquires Stout Company.

- See Ford, Henry: Henry Ford buys Stout metal airplane company.

Stout, William B. An air line with a promise. The Stout metal air Pullman in flight.

Slipstream, Vol. 6, No. 4 (Apr. 1925), Dayton, Obio, pp. 12-13, ill.

- Interchangeable manufacture as applied to airplane construction.

American Machinist, Vol. 62, No. 20 (May 14, 1925), New York, pp. 767-770, ill.

- Metal airplanes.

Journ. Soc. Automotive Engineers, Vol. 16, No. 2 (Feb. 1925), New York, pp. 209-214, ill.

Stout, W. W. This aviation business.

Saturday Evening Post, Vol. 197 (Mar. 21, 1925), Philadelphia, pp. 6-7, ill.

Strauss, J. Air power; the myth and the reality.

Outlook, Vol. 140 (June 24, 1925), New York, pp. 290-291, ill.

Streamlines. See Kärmän, Th. v.: Ueber die Stabilität der Laminarströmung und die theorie du Turbulenz.

- See Kerston, J. H. W.: To shape the auto like a fish.

- See Prandtl, Ludwig, und O. Tietjens: Kinematographische Strömungsbilder.

Streett, St. Clair. What airports mean.

Aero Digest, Vol. 7, No. 1 (July 1925), New York, pp. 355-356, ill.

Strelecki, Jean de. Russia's air force is growing.

Aero Digest, Vol. 6, No. 6 (June 1925), New York, pp. 295-296, ill.

Stress. Photoelastic methods of measuring stress.

Flight, Vol. 17, No. 9 (Feb. 26, 1925), London, pp. 116-117.

Strinofellow, John. See Hegener, Henri: De baanbrekers der dynamische luchtvaart VIII John Stringfellow en William Henson.

Struts. Materials and chemistry. Material for use in the construction of struts in aircraft.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 1, London, 1925, pp. 37-38.

- See Bradfield, F. B. : Scale effects on struts and drag of wiring plates of a

Bristol fighter. Correction of model tests for comparison with the full scale.

Subito. The "Subito" cylinder gauge.

Flight, Vol. 17, No. 10 (Mar. 5, 1925), London, p. 137, ill. SüRiNG. See Hann-Süring: Lehrbuch der Meteorologie. Suffrin. Après le 9e Salon de l'Aéronautique.

L'Aérophile, 33e Année, Nos. 1-2 (ler-15 jan. 1925), Paris, pp. 2-5, ill.

- Le vol à voile et l'avion à faible puissance.

L'Aérophile, 33e année, Nos. 15-16 (ler-15 août 1925), Paris, pp. 241-244,111.

Suffrin-Hébert, M. Le meeting expérimental de Vauville.

L'Aéronautique, 7me année, No. 76 (sept. 1925), Paris, pp. 329-332, ill.

Sugimoto, 0. The horsepower rating formula for aero engine.

Journ. Soc. Mecn. Eng., Vol. 28, No. 101 (Sept. 1925), Tokyo, pp. 609-615.

Superchargers. Engines. Supercharging.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 1, London, 1925, p. 30.

--A new American supercharger.

The Aeroplane, Vol. 28, No. 4 (Jan. 28, 1925), London, p. 84, ill.

- See Gregg, David: Gear-driven plane supercharger passes Dayton air

tests.

--See Gregg, David: Superchargers.

- See Jones, E. T.: Superchargers for airplanes.

Supermarine. The Supermarine at Southampton.

The Aeroplane, Vol. 29, No. 13 (Sept. 23,1925), London, pp. 364-368, ill.

--The Supermarine successes.

Aviation, Vol. 19, No. 17 (Oct. 26, 1925), New York, pp. 584-585, ill.

Supermarine-Napier. The Supermarine-Napier monoplane.

Aviation, Vol. 19, No. 14 (Oct. 5, 1925), New York, p. 438, ill.

Supermarine-Napier S-4. See Records: The world's seaplane speed record. Super-Rhone. The "Super-Rhone" engine.

Aviation, Vol. 18, No. 9 (Mar. 2, 1925), New York, p. 244.

Surveying. Aerial surveying.

The Aeroplane, Vol. 29, No. 3 (July 15, 1925), London, pp. 92, 94.

- Aerial surveying equipment—helicopters—production airplanes of metal.

Mechanical Engineering. Journal of the American Society of Mechanical Engineers, Vol. 47, No. 4 (Apr. 1925), New York, pp. 266-270.

- Aerial surveys in Canada.

Aero Digest, Vol. 6, No. 4 (Apr. 1925), New York, pp. 200-201, ill.

- Air surveying 15,000 square miles of forest in Burma.

Flight, Vol. 17, No. 51 (Dec. 17, 1925), London, pp. 826-827.

- Surveying by photography from the skies.

Engineering Progress, Vol. 6, No. 9 (Sept. 1925), Berlin, pp. 285-286, ill.

- See Aschenbrenner, C: Ueber ein neues halbautomatisches Entzerrungsgerät für den praktischen topographischen Gebrauch.

- See Beadle, J. B.: Airplane speeds up power surveys.

Surveying. See Cochran-Patrick, C. K.: Air surveys in Burma.

- See.England: Aerial survey of England.

- See Hemming, H.: Air surveying.

- See Jones, B. Melville, and j. C. Griffiths: Aerial surveying by rapid

methods.

- See Kemp, R. C, C. G. Lewis, C.W. Scott, and C. R. Robbins: Aerophoto

survey and mapping of the forests of the Irrawaddy Delta.

- See London-Cape Town: The London-Cape Town imperial airway survey

flight.

- See Mattison, G. C.: Aerial survey of the Mississippi River delta.

- See Passy, P. De L.: Aerial photographs aid the map maker.

- See Pierce, j. W.: Aerial photographs, surveys, and maps.

- See Robinson, Ernest: Equipment used for aerial surveying.

- See Tymms, F.: The Oxford University Arctic Expedition, 1924. VII.

Aerial survey.

- See Wicksteed, H. K.: Making railway reconnaissance surveys by aerial

methods.

Sutton, F. C. See Simmons, W. H., and F. C. Sutton: Measurement of the rate of flow of fluids by a rotameter.

Svenska. A Swedish reconnaissance twin-float seaplane. The type S.ll, with Rolls-Royce "Eagle" engine.

Might, Vol. 17, No. 12 (Mar. 19, 1925), London, pp. 158-160, 111., diagr.

Sweuen. See Brilioth, Borge: Sweden's air industry.

- See Brilioth, Börje: Swedish air-mindedness.

-- See Hedin, Naboth: Northern Europe's air center—Sweden.

Sykes, F. H. Air power and policy.

Edinburgh Review, Vol. 242, (Oct. 1925), New York, pp. 380-394.

T

Take-off. See Crowley, j. W., jr., and K. M. Ronan: Characteristics of a single-float seaplane during take-off.

Tanaka, Keikichi. The inertia forces and couples and their balancing of the Star-type engine.

Report of the Aeronautical Research Institute, Tokyo Imperial University, Vol. 1, No. 10 (Mar. 1925), Tokyo, pp. 247-304, ill., diagrs.

Tandem air screws. See Lynam, E. j. H.: Experiments with a close tandem airscrew pair.

Tandem propellers. See Glauert, H.: The efficiency of a system of airscrews.

Tandem wings. See Le Page, W. L.: Further experiments on tandem aerofoils.

Tausz, j., and F. Schulte. Determination of ignition points of liquid fuels under pressure.

National Advisory Committee for Aeronautics, Technical Memorandums No. 299, Jan. 1925, Washington, pp. 14, ill. From "Zeitschrift des Vereines Deutscher Ingenieure," May 31, 1924.

53466—28-12

Taylor, C. Fayette. The design of air-cooled cylinders.

Aviation, Vol. 18, Nos. 23-24 (June 8-15, 1925), New York, pp. 634-636, 664-667, diagr. Slipstream, Vol. 6, No. 6, 7 (June, July 1925), Dayton, Ohio, pp. 13-15, 22, 20-23.

Taylor, David Watson. Model experiments in aerodynamics.

Engineering, Vol. 119, No. 3097 (May 8, 1925), London, pp. 681-583, ill.

- Some aspects of the comparison of model and full-scale tests.

Journ. Eoy. Aer. Soe ., Vol. 29, No. 175 (July 1925), London, pp. 300-332, ill.

Taylor, G. J. Experiments with rotating fluids.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 89-96.

Tchentzopf, N. G. The flow of gases in pipes with wall friction.

Transactions of the Central Aero-Hydrodynamical Institute, No. 1, U". S. S. E. Scientific-Technical Department of the Supreme Council of National Economy, No. 63, Moscow, 1926, pp. 37-67.

Teller, Otto. Rohrbach-MetaHflugzeugbau auf der Deutschen Verkehrsausstellung.

Aut. Mot. Flug., 7. Jahrg., Nr. 16 (31. Aug. 1925), Berlin, pp. 447-448, ill.

Temperature. See Mason, W.: The effect of a temperature of 212° F. on steel submitted to alternating torsion.

Terminology. Glossary of aeronautical terms.

Congressional Digest, Vol. 4 (Apr. 1925), Washington, pp. 231.

Tests. Smashing airplanes in a test.

Literary Digest, Vol. 85, No. 4 (Apr. 25, 1925), New York, pp. 24, ill.

- Some aspects of the comparison of model and full-scale tests.

Flight, Vo.l 17, No. 19 (May 7, 1925), London, pp. 278-279, diagr., tabi.

Thalau, Karl. Computation of cantilever airplane wings.

National Advisory Committee for Aeronautics, Technical Memorandums No. 325, July 1925, Washington, pp. 21, ill. From "Zeitschrift für Flugtechnik und Motorluftschiflahrt," May 26, 1924.

- Uber die Verbundwirkung von Rippen im freitragenden, zweiholmigen

und verspannungslosen Flugzeugflügel.

Zeitschr. Flugt. Mot., 16. Jahrg., 20. Heft (28. Okt. 1925), München, pp. 415-444, ill., diagrs., tabls.

- Zur Berechnung freitragender Mugzeugfiügel. (Vierendeel-Rostträger.)

Zeitschr. Flugt. Mot., 16. Jahrg., 3. Heft (14. Feb. 1925), München, pp. 86-87, ill.

Theiss, L. E. Why not parachutes for dirigibles?

Outlook, Vol. 141 (Oct. 14, 1925), New York, pp. 227-229, ill.

Thieppry, F. Historique de la première liaison aérienne entre la Belgique et sa colonie.

LAérophile, 33e année, Nos. 13-14 (ler-15 juil. 1925), Paris, pp. 200-204, ill., map.

Thoma, D. Beitrag zur Theorie der Kompassstörungen.

Zeitschr. Flugt. Mot., 16. Jahrg., 23. Heft (14. Dez. 1925), München, pp. 486-487, ill.

- Grundsätzliches zur einfachen Strahltheorie der Schraube.

Zeitschr. Flugt. Mot., 16. Jahrg., 10. Heft (28. Mai 1925), München, pp. 206-208, ill.

- See Prandtl, Ludwig: Bemerkung zu dem vorstehenden Aufsatz von. D.

Thoma.

Thomas, Marius. Aménagement et entretien des terrains d'aviation.

LAéronautique, 7me année, No. 71, 74 (avril-juil. 1925), Paris, pp. 149-152, 189-192, 229-232, 269-271, ill.

Thomas, W. Norman. The effect of scratches and of various workshop finishes upon the fatigue strength of steel.

Aeronautics. Techn. Eep. Aer. Ees. Com., 1923-24, Vol. 2, London, 1925, pp. 542-568, Ills, diagrs., tabls. Eeports and Memoranda, No. 860, March 1923 (M. 20).

Thompson, G. F. Air mail.

St. Nicholas, Vol. 52 (Dec. 1924), New York, pp. 168-169, ill., map.

- New night flight for the air mail.

St. Nicholas, Vol. 52 (May 1926), New York, p. 760, ill.

Thomson, Lord. Aerial warfare and disarmament.

Survey, Vol. 53 (Feb. 1, 1925), New York, pp. 503-506, ill.

Thomson, Lord, and W. Sefton Brancker. Britain in the air.

Aero Digest, Vol. 6, No. 3 (Mar. 1925), New York, pp. 133-135, 170, ill.

Thoret. Le vol à voile et la connaissance de l'atmosphère.

L'Aérophile, 33e armée, Nos. 15-16 (ler-15 août 1925), Paris, pp. 238-240, ill.

Thunderstorms. Onweders en luchtvaart.

Het Vliagveld, 9de Jaarg., No. 9 (Sept. 1925), Amsterdam, pp. 232-235, 111.

Tietjens, O. See Prandtl, Ludwig, und O. Tietjens: Kinematographische Strömungsbilder.

Tilgenkamp, Erich. Der Luftverkehr.

Uster (Schweiz), Verlagshuchdruckerai Karl DIdiarJean.

Tinker, C. A. Is fear keeping us back?

Collier's, Vol. 75 (Jan. 31, 1925), Springfield, Ohio, pp. 16-17, ill.

- We can fly to peace.

Collier's, Vol. 75 (Jan. 24,1925), Springfiald, Ohio, pp. 5-6, 111.

Tipton, W. D. National Guard cross-country meet.

Aviation, Vol. 18, No. 24 (June 15, 1926), New York, p. 668.

Tizard, H. T. Is civil aviation a luxury? Is flying unsafe?

U. S. Air Services, Vol. 10, No. 1 (Jan. 1925), Washington, pp. 18-20.

Tokyo. See Rome-Tokyo: Rome-Tokyo-Rome. Marquis de Pinedo's grand air tour successfully concluded.

Torpedo planes. Modern torpedo plane has early ancestor.

Aviation, Vol. 18, No. 8 (Feb. 23, 1925), New York, p. 215, ill.

Toulmin, Jr., H. A. "He seeks the facts." An appreciation of General Patrick.

National Aeronautic Association Eaview, Vol. 3, No. 12 (Dec. 1925), Washington, D. C, pp. 191-192.

Toussaint. Le centrage et la stabilité statique longitudinale des avions.

Service Technique de l'Aéronautiqua, Bullutin Technique, No. 31 (juli. 1926).

- Étude sur la structure interne, et la turbulence du vent naturel, dans les

couches inférieures de l'atmosphère.

La Techn. Aaron., 16e année, n. s., No. 40 (15 fév. 1925), Paris, pp. 34-46, ill.

- Études et expériences sur l'effet Katzmayr.

Service Technique de l'Aéronautiques, Bulletin Technique N. 22.

Townend, H. C. H. See Lock, C. N. H., H. Bateman, and H. C. H. Townend: The air-flow round a body as affecting airscrew performance.

- See Lock, C. N. H., H. Bateman, and H. C. H. Townend: Experiments to

verify the independence of the elements on an airscrew blade.

- See Lock, C. N. H., and H. C. H. Townend: Lift and drag of two aerofoils measured over 360° range of incidence.

Trailino flap. See Bradfield, F. B.: On the use of a slotted trailing flap on aerofoils of various cambers.

Training. See Avis: Some "Avis" school monoplanes.

- See Blackburn: The Blackburn flying school.

- See Poeschel: Suggestions for courses of instruction in aviation.

- See Rienau, Rudolf: Die Schule des Fliegens.

- See Schools: Teaching the young idea. Aviation lectures and flights for

public schools.

- See War Department: War Department's new policy on aviation training.

Training camps. United States Army Air Service training camps. Aviation, Vol. 19, No. 9 (Aug. 31, 1925), New York, p. 256.

Training machine. See Feiro: The Feiro "Dongo." A Hungarian school machine of unorthodox design.

Trains. Treno squadriglia.

Rend. Teen. Dir. Gen. Genio Costr. Aer., Anno 13, N. 8 (15 Nov. 1925), Roma, pp. 1-2, ill.

Transmission. See Allison: The Allison four-engine transmission.

Trans-oceanic airways. See Oceanic airways: Trans-oceanic airways. Ambitious heavier-than-air scheme.

Transportation. The cost of air transport.

National Aeronautic Association Review, Vol. 3, No. 9 (Sept. 1925), Washington, D. C, pp. 131-133, ill.

- Progress of air transport in Europe.

Aviation, Vol. 18, No. 9 (Mar. 2, 1925), New York, pp. 270-271, ill.

- See Black, Archibald: The fourth arm of transport.

-' See Civil aviation: The lessons of six year's experience in air transport.

- See Gillman, H. R.: Carrying goods by air.

- See Kennedy, Thomas Hart: An introduction to the economics of air

transportation.

- See Martinot-Lagarde, C: Le véhicule automobile au service de l'aviation.

-- See Orcy, Ladislas d': International air transportation.

- See Van Zandt, J. Parker: Frontier facts in air transportation.

Travel Air. The Travel Air plane.

Aero Digest, Vol. 7, No. 2 (Aug. 1925), New York, p. 428, ill.

- The Travel Air special. A commercial airplane designed in accord with

the aeronautical safety code.

Aviation, Vol. 19, No. 24 (Dec. 14, 1925), New York, p. 842, ill..

Trepftz, E. Graphic construction of Joukowski wings.

National Advisory Committee for Aeronautics, Technical Memorandums No. 336, Oct. 1925, Washington, pp. 17-20, ill. ,

From " Zeitschrift für Flugtechnik und Motorluftschiffahrt," May 31,1913.

Trenchard, Hugh. The air of defenses of Great Britain. Sir Hugh Trenchard's address at Cambridge University.

Flight, Vol. 17, No. 19 (May 7, 1925), London, pp. 273-275..

- See Military aeronautics: The terror of the air.

Trubt, Harry A. The aerial postal epoch.

Aero Digest, Vol. 7, No. 2 (Aug. 1925), New York, pp! 416-418, 448, ill.

Tuchsherer's ring key. See Carlsen, II.: An investigation of Tuchsherer's ring key.

Tuckeiîman, Louis Bryant, and C. S. Aitchison. An analysis of the deformation of the mooring spindle of the "Shenandoah." January 9, 1925.

United States Bureau of Standards. Technologic Papers, No. 270. Washington, Oovero-ment Printing Office, 1925, pp. 609-618, ill.

Tuckerman, Louis Bryant. Inertia factors of ellipsoids for use in airship design.

National Advisory Committee for Aeronautics, Report No. 210, July 25, 1925, Washington, Government Printing Office, 1925, pp. 7.

- Water model tests for semirigid airships.

National Advisory Committee for Aeronautics, Report No. 211, March 20, 1925, Washingtoo Government Printing Office, 1925, pp. 14.

Tulsa. The Tulsa air meet.

Aviation, Vol. 19, No. 13 (Sept. 28,1925), New York, p. 388, ill.

Turbines. See Schilhansl: Fragen der neuren Turbinentheorie.

Turbulence. See Kàrmàn, Th. v.: Ueber die Stabilität der Laminarströmung und die théorie du Turbulenz.

- See Keller, L., und A. Friedmann: Diferentialgleichungen für die turbulente Bewegun einer Kompressibelen Flüssigkeit.

- See Solberg, H.: Zum Turbulenzproblem.

Turn indicator. Un indicateur de virage de haute précision.

L'Aéronautique, 7me année, No. 72 (mai 1925), Paris, p. 193, ill.

- See Instruments: A new gyroscopic turn indicator.

- See Smith: Smith's gyro turn indicator.

Turnbull, A. D. Battleship or airship?

Current History Mag. of N. Y. Times, Vol. 22 (Apr., 1925), New York, pp. 10-18, ill.

Tymms, F. The Oxford University Arctic Expedition 1924. IV. Aerial navigation in the Arctic.

Geographical Journal, Vol. 66, No. 2 (Aug. 1925), London, pp. 126-129.

- The Oxford University Arctic Expedition 1924. VII. Aerial survey.

Geographical Journal, Vol. 66, No. 2 (Aug. 1925), London, pp. 130-134, ill.

- Practical navigation of aircraft.

Journ. Roy. Aer. Soc, Vol. 29, No. 173 (May 1925), London, pp. 202-239, ill.

U

Udet, Ernst. See Waldhausen, Hans: Mit enfalteten und beschnittenen Flügeln.

Union of South Africa. The Durban-Cape Town air mail.

The Aeroplane, Vol. 28, No. 15 (Apr. 15, 1925), London, pp. 364, 366, map.

United Air Force. Arguments iu favor of a united air force. 1 Aviation, Vol. 18, No. 3 (Jan. 12, 1025), New York, pp. 78-79.

United States. Aeronautical crisis.

Scientific American, Vol. 133 (Nov. 1925), New York, p. 300.

- Aeronautics in America.

The Aeroplane, Vol. 29, Nos. 14,16 (Sept. 30, Oct. 11, 1925), London, pp. 404-405, 454-456.

—:— Aeronautics in the Government.

National Aeronautic Association Review, Vol. 3, No. 2, 5 (Feb., May, 1925), Washington, D. C, pp. 19-20.

- Air line development in the States.

The Aeroplane, Vol. 28, No. 21 (May 27, 1925), London, p. 505.

United States. Airship development in the United States and in Great Britain.

Nature Vol. 115, No. 2891 (Mar. 28, 1925), London, p. 470.

- America's drooping wings.

Literary Digest, Vol. 84, No. 2 (Jan. 10,1025), New York, pp. 14-15, ill.

- Eenige cijfers betreffende den Amerikaanschen luchtpostdienst.

Het Vliegveld, 9de Jaarg., No. 12 (Dec. 1925), Amsterdam, p. 320, diagrs.

- New air policy for America.

Review of Reviews, Vol. 72 (Oct. 1925), New York, pp. 421-422.

- No turning back in America's conquest of the air.

Literary Digest, Vol. 86 (Sept. 19, 1925), New York, pp. 5-8, ill.

- On a visit to America.

The Aeroplane, Vol. 28, Nos. 6, 8 (Feb. 11, 25, 1925), London, pp. 118, 120, 166, 168.

- On air agitation in America.

The Aeroplane, Vol. 28, No. 8 (Feb. 25, 1925), London, pp. 165-166.

- On American aircraft developments.

The Aeroplane, Vol. 28, No. 7 (Feb. 18,1925), London, p. 154.

- To produce officers who can fly.

Literary Digest, Vol. 85, No. 8 (May 23, 1925), New York, pp. 9-10, ¡11.

- See Abeelen, van den: De Amerikaansche luchtpostdienst.

- See Arnold, H. H.: Wars have forced major developments in United

States airplane engine design.

- See Bouché, Henri: Visite à l'aviation des États-Unis.

- See Breguet, Louis: L'aviation aux États-Unis.

- See Cram, Ralph W.: American aviation's greatest year.

- See Douglas: The Douglas D. A. M. 2 biplane. The American machine

designed for air mail service.

- See Grey, Charles Grey: Civil aviation in the United States.

- See Leroux; L'organisation technique officielle de l'Aéronautique aux

États-Unis en Angleterre et en France.

- See M'Darment, Corley: What we could do in the air if we had to.

- See McLaughlin, George F.: American light planes.

- See Mitchell, William: General Mitchell drops some bombs.

- See Photography: L'appareil photographique à chambres multiples en

service dans l'aviation militaire aux États-Unis.

Uniteu States Aeronautical Board. See Butler, Jarvis: The United States Aeronautical Board.

Uniteu States Air Services. Report; inquiry into operations of the United States air services. (68th Cbng., 2d sess., H. rept. 1653.) Washington, Supt. of Docs., 1925, pp. 54.

- United States Congress. House Select Committee of Inquiry into Operations of the United States Air Services: hearings before the committee, House of Representatives, Sixty-eighth Congress, on matters relating to the operations of the United States air services.

Washington, Supt. of Docs., 1925, pp. 517.

r- War Department. Catalogue of motion-picture films and lantern slides.

Air Service Information Circular (Aviation), Vol. 5, No. 469 (Junç 1, 1924), Washington, Government Printing Office, 1925, pp. il, 43,

United States Army. See Army Air Service: Army air service costs once more aired.

- See Army and Navy: Air controversy in the U. S. A.

- See Army and Navy: The airplane-battleship rumpus.

- See Army and Navy: The Army, the Navy, and the airplane.

- See Training camps: United States Army air service training camps.

United States Congress. Senate. Committee on Military Affairs. Production of helium . . . Report. To accompany H. R. 5722.

Washington, Government Printing Office, 1925, pp. 5. 68th Congress, 2d session. Senate. Report 1052. Calendar No. 1117.

United States Naval Academy. See Naval Academy: Aeronautics made a major subject at United States Naval Academy.

- See Warlick, William Walter: Naval aviation; a textbook for the instruction of midshipmen in the department of seamanship, United States Naval Academy.

United States Navy. The Navy stands by its guns.

Literary Digest, Vol. 84, No. 10 (March 7, 1925), New York, pp. 9-10.

- Le raid des hydravions américains. Neuf jours a la derive sur le Pacifique

a bord d'un hydravion a coque de duraluminium.

L'Aéronautique, 7me année, No. 77 (oct. 1925), Paris, p. 393, ill.

- See Airships: United States Navy plans 6,000,000 cubic-foot airship.

- See Army and Navy: Air controversy in the U. S. A.

- See Army and Navy: The airplane-battleship rumpus.

- See Army and Navy: The Army, the Navy, and the airplane.

- See Cocklin, Henry S.: Development of Navy patrol planes.

- See Fullam, W. F.: Our air navy.

- See Sandifer, Thaddeus Nelson: Navy aircraft to solve riddles of the

arctic.

- See Wilson, E. E.: Power plants for United States Navy aircraft.

Uniteu States War Department. See Commercial aeronautics: How the War Department retards flying.

- See Landing fields: How the War Department retards flying.

Unsintjs, Oskar. See Poeschel, Johannes: Einführung in die Luftfahrt . . . Upper air. See Atlantic: Upper air circulation of the Atlantic.

- See Commission for the Exploration of the Upper Air: 1925, London.

- See Durward, J.: Investigation of the winds in the upper air from information regarding the place of fall of pilot balloons and the distribution of pressure.

Urner, M. H. Over the Danube in a hydroplane.

Literary Digest, Vol. 85, (Apr. 4, 1925), New York, pp. 79-82.

v

Vachon, I. Les conditions du travail aérien au Canada. Qualités d'un hydravion de travail aérien.

L'Aéronautique, 7me année, No. 79 (dec. 1925), Paris, pp. 447-451, ill.

Valve method. See Obata, Jûichi, and Yahei Yoshida: On the valve method of measuring small motion, with special reference to the precise recording of sounds, pressure-variations, and vibrations.

Van Obman, W. G. Van Orman winner in national elimination balloon race.

U. S. Air Sarvlces, Vol. 10, No. 6 (June 1925), Washington, p. 39.

Van Orman, W. T. Bumping the clouds in a racing balloon.

Popular Mechanics, Vol. 44 (August 1925), Chicago, pp. 210-214, ill.

Van Zandt, J. Parker. European commercial aeronautics. Prepared for United States Army air service, from data obtained during his inspection trip, July-September, 1924.

National Advisory Committee for Aeronautics, Tachnical Memorandums No. 316, May 1925, Washington, pp. 14, map. Journ. Soc. Automotive Enginaers, Vol.17, No. 4 (Oct. 1925), Naw York, pp. 354-358, diagrs.

- Frontier facts in air transportation.

Aviation, Vol. 19, No. 19 (Nov. 9,1925), Naw York, pp. 677-681, map, charts.

- Latécoère air lines.

National Advisory Committee for Aeronautics, Technical Memorandums No. 327, August 1925, Washington, pp. 17, ill. Preparad for tha U. S. Army Air Service.

—--Looking down on Europe; sight-seeing by airplane, over commercial

aviation routes.

National Olographic Magazina, Vol. 47 (Mar. 1925), Washington, pp. 261-326, ill., map.

- Preliminary report on British commercial aeronautics.

National Advisory Committea for Aeronautics, Tachnical Memorandums No. 328, Sapt. 1925, Washington, pp. 11.

--Report on commercial air transportation activities in England, France,

Germany, and Holland. Prepared for the United States Army air service.

National Advisory Committea for Aeronautics, Technical Memorandums No. 319, June 1925 (Sept. 28, 1925), Washington, pp. 70, ills., tahls., map.

- Statistics of foreign commercial aviation.

Slipstream, Vol. 6, No 2 (Feb. 1925), Dayton, Ohio, pp. 19-21.

Vanderbilt, Harold S. See McLaughlin, George F. : Vanderbilt's air yacht.

Varekamp, D. C, en D. J. Keuvelink. Een nieuw sportvliegtuig.

Het Vliegvald, 9da Jaarg., No. 7 (Juli 1925), Amstardam, pp. 183-184, ill.

Variable camber. See Boyd: Boyd variable camber monoplane. Varni, A. Nota su un nuovo motore per navigazione marittima ed aerea.

Rivista Marittima, Anno 58, N. 4 (aprila 1925).

Varnishes. See Deschiens, M.: Aviation dopes or varnishes.

Vatjghan, Katherine. Women and flight.

Aero Digast, Vol. 6, No. 1 (Jan. 1925), New York, pp. 24-25, ill.

Vauville. Vauville meeting, 1925.

Flight, Vol. 17, No. 33 (Aug. 13, 1925), London, pp. 517-524, ill.

--See Auger, A.: Mes impressions de Vauville.

--See Lympne: Lympne en Vauville.

Velocity. See Münk, Max Michael: The velocity distribution caused by an airplane at the points of a vertical plane containing the span.

Verdtjrand. Le prix de revient de la tonne kilométrique dans les transports ' aériens.

La Tachn. Aéron., 16e année, n. s., No. 45 (15 juli. 1925), Paris, pp. 215-219.

Verdurand, Abel. Quelques conditions de bon rendement des avions commerciaux.

L'Aéronautique, 7me année, No. 68 (jan. 1925), Paris, pp. 29-22, ill.

Verdtjrand, Abel, et Henri Bardel. L'utilisation des parachutes dans l'aviation commerciale.

L'Aéronautique marchanda (L'Aéronautique, 7me année, No. 75), 4me année, Num. 44 (août 1925), Paris, pp. 315-317.

Verduzio, Rodolfo. Calcolo della navicella e degli organi accessori nei dirigibili.

Supplemento Eend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 3 (15 Marzo 1925), Roma, pp. 1-47, ill.

Vergnette, François de. See Blanchet, Georges: Aviateurs contemporains. Le colonel François de Vergnette de Lamotte.

Verneuil, Max. L'hélium.

La Techn. Aéron., 16e année, n. s., No. 46 (15 août, 15 Sept. 1925), Paris, pp. 246-252, 283285, map.

Veterans' Bureau. »See Hines, Frank T.: The Veterans' Bureau and air pilots.

Viborel, Louis. Le raid aérien Paris-Tokio. Organisation du terrain d'atterrissage de Kiang-Wan, près Shanghai. Shanghai, Nov. 1924.

Vibration. »See Sezawa, Katsntada: On the free vibration of a metallic plate fixed at four edges.

- »See Sezawa, Katsntada: On the vibration of aeroplane wings.

Vickers. The Canadian Vickers "Vedette" flying boat.

The Aeroplane, Vol. 28, No. 1 (Jan. 7, 1925), London, p. 8, ill., diagr.

- Een nieuw verkeersvliegtnig van Vickers.

Het Vliegveld, 9de Jaarg., No. 11 (Nov. 1925), Amsterdam, p. 283, ill.

- The Vickers Vanguard.

The Aeroplano, Vol. 29, No. 23 (Dec. 2,1925), London, p. 648, ill., diagr.

- The Vickers "Vanguard" air liner.

Aviation, Vol. 19, No. 26 (Dec. 28,1925), New York, p. 912, ill.

—t— The Vickers "Vedette" flying boat. First machine designed and built by Canadian Vickers.

Flight, Vol. 17, No. 1 (Jan. 1, 1925), London, pp. 3-4, ill.

Villa, Georges. »See Blanchet, Georges: Aviateurs contemporains. Georges Villa.

Vincent, J. G. Designing engines into airplanes.

Aviation, Vol. 19, No. 22 (Nov. 30, 1925), New York, pp. 776-778, ill., diagr.

Vinci, Leonardo da. »See Hart, Ivor Blashka: Mechanical investigations of Leonardo da Vinci.

Visibility. »See Luckiesh, M.: Aerial photometry and the visibility of airplanes.

Vittoria. Aeroplano a finezza variabile Piero Magni I "Vittoria" 1924, 50 cav. Anzani 6-A-20.

L'Aerotecnica, Voi. 5, N. 5 (Settembre-Ottobre 1925), Pisa, pp. 316-319, ill.

Vogt, R. Das gunstigste Seitenverhältnis.

Zeitschr. Flugt. Mot., 16. Jahrg., 8. Heft (2S. April 1925), München, pp. 167-170, ill.

-■ Über günstigste Holmhöhen im Zusammenhang mit den Bieguugsmo-

menten und Querkräften.

Zeitschr. Flugt. Mot., 16. Jahrg., 22. Heft (28. Nov. 1925), München, pp. 467-470, ill.

Volcanoes. See Boles, Thomas: Volcano destroys landing field. Volmerange, A. Le règlement et le registre aéronautique du bureau Veritas.

l'Aéronautiqua, 7me année, No. 71 (avril 1925), Paris, pp. 123-126. Vortex motion. See Brodetsky, G.: Vortex motion.

- See Howland, R. C. J. : Vortex motion behind a circular cylinder.

Vortex, theory. See Fage, A.: An analysis of the pressure distribution on a model air screw by means of the vortex theory.

■-- See Glauert, H.: Experimental tests of the vortex theory of aerofoilß.

- See Glauert, H.: Notes on the vortex theory of airscrews.

- See Lock, C. N. H., and H. Bateman: Experiments with a family of airscrews. Part III. Analysis of the family of airscrews by means of the vortex theory and measurements of total head.

Vortices. See Bjerknes, V.: Sur les forces qui portent les aéroplanes et leur relacion avec les actions hydrodynamiques à distance.

- See Lock, C. N. H.: On the system of vortices generated by a circular

cylinder in steady motion through a fluid.

W

W., F. Flugzeug-Reklame.

AM. Mot. Flugw., 7. Jahrg., Nr. 4 (28. Febr. 1925), Berlin, p. 106.

- Flugzeugbau in der Tschechoslovakei. Aero-Flugzeuge.

Aut. Mot. Flugw., 7. Jahrg., Nr. 4 (28. Febr. 1925), Berlin, p. 105, ill.

- Sensationsgelüste.

Aut. Mot. Flugw., 7. Jahrg., Nr. 3 (15. Fabr. 1925), Barlin, p. 77, 111.

W., K. H. v. Luftracht.

Aut. Mot. Flugw , 7. Jahrg., Nr. 17 (15. Sept. 1925), Berlin, pp. 477-478.

Waco. The Waco Model 9.

Aviation, Vol. 18, No. 20 (May 18, 1925), New York, pp. 542-543, ill.

- The Waco three-seater.

Aero Digest, Vol. 6, No. 6 (June, 1925), New York, p. 317, ill.

Wadsworth, James Wolcott. See United States Congress. Senate. Committee on Military Affairs: Production of helium.

Wagner, J. Hawa haqïnda.

Taschkent, 1924, pp. 110.

Walcott, Charles Doolittle. Langley plane.

Outlook, Vol. 140 (May 13,1925), New York, pp. 54-56, ill.

--- The National Advisory Committee.

National Aeronautic Association Review, Vol. 3, No. 6 (June, 1925), Washington, D. C, pp. 88-90, ill. '

- Orville Wright to give first plane to England.

U. S. Air Services, Vol. 10, No. 6 (June, 1925), Washington, pp. 31-33, ill.

--Smithsonian—A pioneer in aeronautics.

National Aeronautic Association Review, Vol. 3, No. 7 (July, 1925), Washington, D. C„ pp.99, 111.

- See National Advisory Committee for Aeronautics: The annual N. A. C. A.

report.

Waldhatjsen, Hans. Mit enfalteten und beschnittenen Flügeln. Schicksale und Gedanken einen abgeschossenen Kampffliegers, Berlin, NW7, 1924,

Walker, Gilbert T. The flapping flight of birds.

Joum. Roy. Aer. Soc, Vol. 29, No. 179 (Nov. 1925), London, pp. 590-597.

Walker, J. B. Low-resistance airplane.

Scientific American, Vol. 132 (June, 1925), New York, pp. 380-381, ill.

- Tragedy of the Shenandoah.

Scientific American, Vol. 133 (Nov. 1925), New York, p. 301, ill.

Walker, Wade. Air flivvers.

Aero Digest, Vol. 6 (Mar. 1925), New York, p. 202.

Walter. The Walter aero engines.

The Aeroplane, Vol. 29, No. 25 (Dec. 16, 1925), London, p. 706, ill.

Walther, P. A. Lifting forces developing on the blades of hydraulic machines working in converging streams.

Transactions ol the Central Aero-Hydrodynamical Institute, No. 12. U. S. S. R. Scientific-Technical Department of tho Supreme Council of National Economy, No. 81, Moscow, 1925, pp. 31, ill.

War Department. War Department's new policy on aviation training. U. S. Air Services, Vol. 10, No. 8 (Aug. 1925), Washington, pp. 29-30.

War surplus. On proposals and disposals.

The Aeroplane, Vol. 29, No. 22 (Nov. 25, 1925), London, pp. 605-614, ill.

Ward, Roswell H. A rapid aerial photographic process.

U. S. Air Services, Vol. 10, No. 9 (Sept. 1925), Washington, pp. 35-36, ill.

Warlick, William Walter. Naval aviation; a textbook for the instruction of midshipmen in the department of seamanship, United States Naval Academy. Annapolls, Md., United States Naval Institute, 1925, pp. 128, ill.

Warner, Edward P. The calculation of wing float displacement in single-float seaplanes.

National Advisory Committee for Aeronautics, Technical Notes No. 215, March, 1925, Washington, pp. 5, diagr.

- The building of Boston airport.

Aviation, Vol. 18, No. 11 (Mar. 16, 1925), New York, pp. 291-293, ill.

- Commerce seeking to conquer the air.

Current History Magazine, N. Y. Times, Vol. 22 (Aug. 1925), New York, pp. 722-727, maps.

- The drift of an aircraft guided toward its destination by directional

receiving of radio signals transmitted from the ground.

National Advisory Committee for Aeronautics, Technical Notes No. 220, June, 1925, Washington, pp. 5, diagrs.

Warner, Edward P., and Shatswell Ober. The estimation of airplane performance from wind-tunnel tests on conventional airplane models.

National Advisory Committee for Aeronautics, Technical Notes No. 218, May, 1925, Washington, pp. 18.

Warner, Edward P. The limiting range of airplanes.

Aviation, Vol. 18, No. 21 (May 25, 1925), New York, pp. 570-572.

- Onward march of aircraft.

Yale Review, n. s., Vol. 14 (Jan., 1925), New Haven, pp. 239-256.

- Wind-tunnel tests of fuselages and windshields.

National Advisory Committee for Aeronautics, Technical Notes No. 226, Sept. 1925, Washington, pp. 6, i.

- Wing-spar stress charts and wing-truss proportions.

National Advisory Committee for Aeronautics, Report No. 214, Nov. 2, 1925, Washington, Government Printing Office, 1925, pp. 18, diagrs.

Watson-Dalby, See Moss, H., and W, J, Stern; Phase setting of engine indicators,

Watt, R. A. Watson. The beneficence of atmospherics.

Journ. Roy. Aer. Soc, Vol. 29, No. 170 (Feb. 1925), London, pp. 62-75, ill.

Waves. See Civita, T. Levi: La determination rigoureuse des ondes permanentes d'ampleur finie. •

Waziristan. The Waziristan campaign.

Flight, Vol. 17, No. 48 (Nov. 28, 1925), London, p. 784.

Weathering. See Glendinning, W. G.: Report on the use of artificial sources of light as a substitute in the weathering of fabric: Part 1.

Weaver, Edgar R. Report of tortional test of Curtiss NBS-4 fuselage.

Air Service Information Circular No 513. Published by the Chief of Air Service, Washington, pp. 4.

- The static proof test of the aileron, stabilizer, and elevator of the Cox-

Heinkel observation airplane P-377.

Air Service Information Circular. Published by Chief of Air Service, Washington, pp. 2.

- Torsional test of Martin-Bomber NBS-1.

Air Service Information Circular No. 515. Published by the Chief of Air Service, Washington, p. i.

Wedemeter, A. Tafeln zur Punkortung.

München und Berlin, R. Oldenbourgs Verlag, 1925, pp. 154. Herausgegeben von der "Wissenschaftlichen Gesellschaft für Luftfahrt."

Weeks, W. S., and J. T. Rutherford. A table for determining drop in pressure in airways.

Engineering and Mining Journal-Press, Vol. 119, No. 26 (June 27, 1925), New York, pp. 1048-1049.

Wegener, Kurt. See Poeschel, Johannes: Einführung in die Luftfahrt . . .

Wehrle, Howard P. Privately owned and operated air terminals. Aviation, Vol. 18, No. 4 (Jan. 26, 1925), New York, pp. 107-108.

Weicht, Fred E. Propeller scale effect and body interference.

National Advisory Committee for Aeronautics, Technical Notes No. 225, Sept. 1925, Washington, pp. 7, diagrs.

Weick, Fred E. Simplified propeller design for low-powered airplanes.

National Advisory Committee for Aeronautics, Technical Notes No. 212, Jan. 1925, Washington, pp. 10, ills., diagrs.

Weiss, Georg. Schütte-Lanz airship projects after the war.

National Advisory Committee for Aeronautics, Technical Memorandums No. 335, Oct. 1925, Washington, pp. 14, ill. From "Schiffbau," May 27, 1925.

Welding. See Johnson, J. B.: Welding of carbon and alloy steel tubing for aircraft.

Wembley. Aeronautics at Wembley.

Flight, Vol. 17, No. 29 (July 16, 1925), London, p. 458. West Point. See United States: To produce officers who can fly. Western Aero League. Western Aero League in launched.

The Ace, Vol. 6, No. 1 (June 1925), Glendale, Calif., p. 5.

--See Wood, Howard I.: High standard set by Western Aero League. Airports and air maps among important undertakings.

Westervelt, C. Flyers and storms.

Saturday Evening Post, Vol. 198 (Dec. 5, 1925), Philadelphia, p. 19, ill.

Westervelt, George C. Captain Westervelt's plan. Head of Naval Aircraft Factory presents concrete recommendations to President's Air Board. Aviation, Vol. 19, No. 18 (Nov. 2, 1925), New York, p. 636.

Westland. A new Westland machine. The "Yeovil" day bomber.

Flight, Vol. 17, No. 51 (Dec. 17, 1925), London, p. 819, ill.

Wetl, Alfred Richard. Der Stand des Baues starker Flugmotoren im Auslande.

Zeltschr. Flugt. Mot., 16. Jahrg., 4. 5 Heft (28 Feb., 14 März 1925), München und Berlin, pp. 99-104,117-121, ill., tabl.

- Uber neuere amerikanische Beschleunigungsmessungen.

Zeitschr. Flugt. Mot., 16. Jahrg., 21. 22 Heft (14. 28 Nov. 1925), München, pp. 451-458, 470474, ill.

Who's Who. See Gardiner, L. D.: Who's Who in American aerouautics.

Wibatjlt, Michel. Principes de construction d'un avion entièrement métallique L'Aérotechnique (L'Aéronautique, 7me année, No. 69), 3me année, Num. 26 (fév. 1925), Paris, pp. 55-75, ill.

Wicherlink, W. H. Nederland en het Europeesche luchtverkeer.

Hot Vliegveld, 9de Jaarg., No. 9 (Sept. 1925), Amsterdam, pp. 237-238.

Wicksteed, H. K. Making railway reconnaisance surveys by aerial methods. Engineering News Record, Vol. 94, No. 6 (Feb. 5, 1925), New York, pp. 220-224, ill.

Wigand, A. Luftelektrische Untersuchungen bei Flugzeugaufstiegen.

Fortschritte der Chemie, Physik und physikalischen Chemie, Bd. 18, Heft 3. Berlin, Gebrüder Borntraeger, 1925, pp. 52.

Wilbur. Secretary Wilbur reports on Naval Aeronautics.

Aviation, Vol. 19,'No. 25 (Dec. 21,1925), New York, p. 872.

- See Military aeronautics: Aircraft defense more expensive than battleships.

Wilbur Wright Lecture. See Taylor, David Watson: Model experiments in aerodynamics.

Wilcke, D. See Stelling, D., und D. Wilcke: Die Deutsche Verkehrsausstellung Raum 4. Luftschiffe.

WiLKERSoN, D. C. New fields for radio; next will be a war in the air.

Radio Broadcast, Vol. 6 (Mar. 1925), Garden City, N. Y., pp. 851-856, ill.

Wilkins, G. H. See Robertson, F. A. deV. : Proposed Antarctic flight. Amundsen's "WAL" to be used. Plans of Capt. G. H. Wilkins, M. C.

Williams, D. H. See Bryant, L. W., and D. H. Williams: Discontinuous flow around the edge of a bluff obstacle.

- See Bryant, L. W., and D. H. Williams: An investigation of the flow of

air around an aerofoil of infinite span.

- See Bryant, L. W., and D. H. Williams: On the effect of inertia on the

lateral motion of an aeroplane under the influence of gusts and control movements.

Wilson, A. Stunt flying.

Saturday Evening Post, Vol. 198 (Sept. 19, 1925), Philadelphia, p. 17, ill.

Wilson, E. Commercial aspect of aerial photography.

Canadian Engineer, Vol. 49, No. 12, (Sept. 22,1925), Toronto, pp. 325-327, Ul.

Wilson, E. E. Aircraft engine design.

National Advisory Committee for Aeronautics, Technical Notes No. 211, Jan. 1925, Washington, pp. 20, ills., diagrs.

- Aircraft engine progress.

TJ. S. Air Services, Vol. 10. No. 2 (Feb. 1925), Washington, pp. 15-19, ill.

- Power plants for United States Navy aircraft.

Mechanical Engineering, Vol. 47, No. 10 (Oct. 1925), New York, pp. 783-789, ill.

Wilson, Hobert L. Army engineering developments of interest to commercial aviation.

Slipstream, Vol. 6, No. 8 (Aug. 1925), Dayton, Ohio, pp. 5-9, ill.

- The trend of aeronautical development.

Slipstream, Vol. 6, No. 9 (Sept. 1925), Dayton, Ohio, pp. 13,16.

- What a study of past air meets reveals.

Slipstream, Vol. 6, No. 10 (Oct. 1925), Dayton, Ohio, pp. 9-15, ill.

Wind. See Huguenard, E., A. Magnan et A. Planiol: Étude sur l'énergie interne du vent, son rôle dans le vol à voile et la navigation aérienne.

- See Johnson, N. K. : Short-period variations of the wind.

- See Sen. Sachindra Nath. : Surface and geostrophic wind components at

Deerness, Holyhead, Great Yarmouth and Scilly.

- See Stewart, C. D. : The measurement of upper wind velocities by observations of artificial clouds.

- See Toussaint: Étude sur la structure interne, et la turbulence du vent

naturel, dans les couches inférieures de l'atmosphère.

Wind channels. The use of the wind channel to aircraft designers.

Journ. Roy. Aer. Soc, Vol. 29, No. 170 (Feb. 1925), London, pp. 93-99.

- See Bose, N. K. : Wind channels in aerodynamics.

Wind tunuels. Aerodynamics. Wind tunnels.

Aeronautics. Techn. Rep. Aer. Res. Com., 1923-24, Vol. 1, London, 1925, p. 27.

- High-speed wind tunnels.

Scientific American, Vol. 133 (Oct. 1925), New York, pp. 275-276, ill., diagr.

- What is the use of wind tunnels?

The Aeroplane, Vol. 28, No. 3 (Jan. 21, 1925), London, pp. 58, 60.

- See Cowley, W. L., and L. J. Jones: An experimental test of the Prandtl

correction for tunnel-wall interference.

- See Dawley, E. R. : Full-scale wind tunnel.

- See Glauert, H.: The interference of wind-channel walls on the aerodynamic characteristics of an aerofoil.

- See Glauert, H., and A. S. Hartshorn: The interference of wind-channel

walls on the downwash angle and the tail-setting to trim.

- See Huguenard, E. : High-velocity wind tunnels. (Their application to

ballistics, aerodynamics, and aeronautics.)

- See Kerneis, Jean: Wire suspensions in wind-tunnel experiments.

- See Lavender, T.: The "Duplex" wind tunnel of the National Physical

Laboratory.

- See Merrill, Albert: New air balance and small wind tunnel.

- See Munk, Max Michael: Preliminary wing model tests in the variable

density wind tunnel of the National Advisory Committee for Aeronautics.

- See Peatfield, I. L. : Lift and drag of the Bristol fighter with wings of

three aspect ratios. Part II. Wind-channel work.

- See Reid, Elliott G. : Standardization tests of N. A. C. A. No. 1 wind

tunnel.

- See Relf, E. F., and E. Ower: Lift, drag and pitching moment of the

y&th. scale Bristol fighter model in the Duplex wind tunnel.

Wind tunnels. See Royal Aircraft Establishment: Lift and drag of standard Bristol fighter with R. A. F. 4D engine. Comparative full scale and model tests.

- See Simmons, L. F. G., and E. Ower: Elimination of the static pressure

gradient along wind tunnels of the N. P. L. type.

Windmills. See Lock, C. N. H., and H. Bateman: Some experiments on air screws at zero torque, with applications to a helicopter descending with the engine "off," and to the design of windmills.

Windshields. See Warner, Edward P.: Wind-tunnel tests of fuselages and windshields.

Wing sections. See Higgins, George J.: The comparison of well-known and new wing sections tested in the variable density wind tunnel.

Wing spars. See Kirste, L6on: Calculation of wing spars of variable cross-section and linear load.

Wings. Caratteristiche aerodinamiche di ali.

Supplemento Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 4, 5 e 6 (15 Aprile, 15 Mag. e 15 Giugno 1925), Roma, pp. 1-40,1-24,1-24, tahis., diagrs.

- Flexible wings score in gliding meet.

Aviation, Vol. 19, No. 8 (Aug. 24, 1925), New York, p. 217, diagr.

- Flying risks cut by slots in wings of plane.

Popular Mechanics, Vol. 44 (July 1925), Chicago, pp. 13, ill.

- A new development of the rotor-aerofoil.

The Aeroplane, Vol. 29, No. 3 (June 15, 1925), London, p. 94, diagr.

- Preliminary study of the influence of a rotating cylinder on a wing.

Flight, Vol. 17, No. 3 (Jan. 15, 1925), London, pp. 30-31.

- Recherches ezp6rimentales—Fascicule III: Profils d'ailes—Maquettes

d'avions et hydravions.

Service Technique de l'Aeronautique, Bulletin Technique N. 25, febbraio 1925.

- See Airfoils.

- See Batson, A. S., and H. L. Nixon: Pressure distribution over the wings

of a model B. E. 2C biplane with raked wing tips.

- See Betz, A.: A method for the direct determination of wing-section drag.

- See Blenk, H., und F. Liebers: Gekoppelte Torsions- und Biegungsschwingungen von Tragflvigeln.

- See Blumenthal, Otto: Pressure distribution on Joukowski wings.

- See Bradfield, F. B.: On the use of a slotted trailing flap on aerofoils of

various cambers.

- See Bradfield, F. B., and A. S. Hartshorn: Test of three aerofoils suitable

for high speed. A. D. 1, Sloane, and R. A. F. 26.

— See Fage, A., and H. L. Nixon: The prediction on the Prandtl theory of the lift and drag for infinite span from measurements on aerofoils of finite span.

- See Garner, H. M., and E. T. Jones: Full-scale tests of different ailerons

on Bristol fighter aeropolane.

- See Glauert, H.: Calculation of the rotary derivatives due to yawing for

a monoplane wing.

- See Glauert, H.: Experimental tests of the vortex theory of aerofoils.

Wings. See Glauert, H.: The rolling and yawing moments of an aerofoil in straight flight.

- See Glauert, H.: The theory of the design of aerofoils, with an analysis

of-the experimental results for the aerofoils R. A. F. 25,'26, 30 to 33.

- See Huguenard, E., A. Magnan et A. Planiol: Sur un appareil mesurant

■ - les déformations des ailes en vue de l'étude de la fatigue et du vieillissement

■ des avions.

- See International Trials: Report on aerofoil tests at National Physical

• -■ Laboratory and Royal Aircraft Establishment.

- See Irving, H. B., and A. S. Batson: Summary of data on slotted wings

' obtained in the wing tunnel of Messrs. Handley Page.

- See Kermode, A. C., and R. G. Harris: Full scale and model measurements

of pressure distribution round one rib of a B. E. 2C aeroplane with R. A. F. 15 section.

- See Kermode, A. C., B. D. Clark and R. G. Harris: Full scale and model

• ' measurements of pressure distribution round two ribs of a B. E. 2E aeroplane with R. A. F. 19 section.

- See Lachmann, G. : Results of recent experiments with slotted wings.

- See Le Page, W. L. : Further experiments on tandem aerofoils.

- See Lecœuvre, R. : Le résistance des voilures d'avions. Un nouvel

appareil de vérification rapide.

- See Lock, C. N. H., and H. C. H. Townend: Lift and drag of two aerofoils

measured over 360° range of incidence.

- See McCarthy, Charles J.: Notes on metal wing construction.

- See Münk, Max Michael: Determination and classification of the aerodynamic properties of wing sections.

- See Münk, Max Michael, and Elton W. Miller: Model tests with a systematic series of 27 wing sections at full Reynolds number.

- See Münk, Max Michael: Preliminary wing model tests in the variable

density wind tunnel of the National Advisory Committee for Aeronautics.

- See Niles, Alfred S., jr.: Load factors for airplane wings.

- See Panetti: Recent progress in the theoretical deduction of airplane

wings.

- See Pris, P.: Résistance minimum des ailes à génératrices rectilignes.

- See Reyneker, F. H. : De belasting van vleugels.

- See Royal Aircraft Establishment : Lift and drag of the Bristol fighter

with wings of three aspect ratios.

-,- See Scarborough, James B. : Some problems on the lift and rolling moment

of airplane wings.

- See Sezawa, Katsutada: On the vibration of aeroplane wings.

-- SeeSimmons, L. F. G., and E. Ower: Test on a large aerofoil of R. A. F.

15 section.

—■— See Thalau, Karl: Computation of cantilever airplane wings.

- See Trefftz, E. : Graphic construction of Joukowski wings.

Wings. ■ See Warner, ' Edward P.: Wing spar stress charts and wing truss proportions. -

—— See Wolff, E. B.: Preliminary investigation of the effect ôf a rotating cylinder in a wing.

Winslow bill. See Osborn, Earl D. : Marginal notes on the Winslow bill. Winteb. Winterlicher Luftverkehr.

Aut. Mot. Flugw., 7 Jahrg., Nr. 24 (31 Dez. 1925), Berlin, p. 692, ill.

Wireless. Aerodrome wireless organisation.

Flight, Vol. 17 No. 11 (Mar. 12, 1925), London, p. 150.

- Wireless and formation flying.

Flight Vol. 17, No. 30 (July 23, 1925), London, p. 471, ill.

- See Sinclair, D.: Civil aviation wireless.

Wires. See Kernéis, Jean: Considérations sur l'emploi des suspensions par fils en aérodynamique expérimentale.

Wissenschaftlichen Gesellschaft für Luftfahrt. Jahrbuch der Wissenschaftlichen Gesellschaft für Luftfahrt 1924. Heft 12 der Berichte und Abhandlungen der W. G. L.

München und Berlin, E. Oldenbourg, 1925, pp. 146, ill.

—:— Preisaussschreiben der Wissenschaftlichen Gesellschaft für Luftfahrt E. V.

Zeitschr. Flugt. Mot., 16. Jahrg., 19. Heft (14. Okt. 1925), München, pp. 407-408.

- See Matthias: Zum ersten "Flugtechnischen Sprechabend" 1925-26 der

Wissenschaftlichen Gesellschaft für Luftfahrt am 27. Oktober 1925.

- See Scheve, G. v. : Bericht über den Verlauf der XIV. Ordentlichen Mitgliederversammlung der Wissenschaftlichen Gesellschaft für Luftfahrt (WGL) vom. 9. bis 12. September 1925 in Münich.

Witoszinski, C. Modification du principe de circulation.

Proceedings of the First International Congress for Applied Mechanics Delft 1924. Delft 1925 pp. 418-126.

Wjatkin. läsän haliq, hawa flotï tüdugä qalîql TJ'la, 1925 pp. 28.

Wolff, E. B. Preliminary investigation of the effect of a rotating cylinder in a wing.

National Advisory Committee for Aeronautics Technical Memorandums No. 397, March 1925, Washington, pp. 12 ill., tabls.

From Eeport A 96 of the "Rijkstudiedienst voor de Luchtvaart, " Amsterdam, reprinted from "De Ingenieur," No. 49, Dec. 6, 1924.

Women. See Vaughan, Katherine: Women and flight. Wood. Hout of metaal?

Het Vliegveld, 9de Jaarg.. No. 8 (Aug. 1925), Amsterdam, pp. 209-211.

- See Moore, Walter M. : Flying wood.

Wood, Henrt, a*nd George McGee. Aircraft experiments for the locating of herring shoals in Scottish waters, 1924.

Fishery Board for Scotland, Scientific Investigations, 1925, No. 1. Edinburgh, 1925, pp. 5-20, charts.

Wood, Howard I. High standard set by Western Aero League. Airports and air maps among important undertakings.

The Ace, Vol. 7, No. 1 (Aug. 1925), Glendale, Calif., pp. 7,13, ill.

Wood, J. B. Seeing America from the Shenandoah.

Natal Geographic Magazine, Voi. 47 (Jan. 1925), Washington, pp. 47, ill., diagr., map.

Wood, R. McK. Lift and drag of the Bristol fighter with wings of three aspect ratios. Part III. Comparison of full scale and model.

Aeronautics. Tachn. Hap. Aar. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 425-428, diagrs.

--Lift and drag of the Bristol fighter with wings of three aspect ratios.

Part IV. The influence of aspect ratio.

Aaronautics. Tachn. Rep. Aer. Res. Com., 1923-24, Vol. 2, London, 1925, pp. 429-431, diagrs.

- See Douglas, G. P., and R. McK. Wood: The effects of tip speed on airscrew performance.

Woodson. The Woodson Foto.

Aviation, Vol. 19, No. 2 (July 13, 1925), Naw York, p. 41, ill.

Woolson, L. M. Recent developments in aircraft engines.

Journ. Soc. Automotiva Engineers, Vol. 16, No. 3,6 (Mar., Juna 1925), Naw York, pp. 297-309, 617-619, ill.

Wooster, S. H. The case for the metal propeller.

U. S. Air Services, Vol. 10, No. 5 (May 1925), Washington, pp. 24-27, ill.

Wooten, Ralph H. Assignment of the air service personnel.

U. S. Air Sarvices, Vol. 10, No. 2 (Feb. 1925), Washington, pp. 40-42, ill.

Work, Hubert. The Interior Department in the air.

National Aeronautic Association Raview, Vol. 3. No. 2 (Feb. 1925), Washington, D. C, pp 21-22.

Wohld flight. What good was the world flight?

Literary Digest. Vol. 83 (Dec. 20,1924), New York, p. 23.

- See Patrick, Mason M.: Engineering the round-the-world flight.

—— See Schut, W. F. H.: Over de kortste verbinding tussschen twee plaatsen op aarde en de toepassing daarvan bij wereldvluchten.

World flyers. Awards to world flyers.

U. S. Air Sarvices, Vol. 10. No. 5 (May 1925), Washington, pp. 41-42.

Weight. The new Wright " Cyclone."

Aviation, Vol. 18, No. 21 (May 25, 1925), Naw York, p. 576, HI.

.t , Two American aero engines. The Wright "Cyclone" and the "Tornado.'

Flight, Vol. 17, No. 6 (Feb. 5, 1925), London, pp. 69-70, 111.

- Wright Aero. Corp. report to stockholders.

Aviation, Vol. 18, No. 14 (Apr. 6, 1925), New York, p. 384.

- Wright-Bellanca plane.

Aero Digest, Vol. 7, No. 6 (Dac. 1925), New York, pp. 668-669, ill.

- Wright-Bellanca monoplane.

Aviation, Vol. 19, No. 18 (Nov. 2, 1925), Naw York, pp. 634-635, ill.

- The Wright Bellanca six-seater cabin plane.

V. S. Air Sarvicas, Vol. 10, No. 11 (Nov. 1925), Washington, p. 23, ill.

- The Wright Cyclone aviation engine.

Aviation, Vol. 18, No. 7 (Fab. 16, 1925), Naw York, p. 185, ill.

- Wright Cyclone engine flight tested.

Aviation, Vol. 19, No. 8 (Aug. 24,1925), Naw York, p. 211.

t

- The Wright Cyclone radial engine.

The Aaroplana, vol. 29, No. 17 (Oct. 21,1925), London, p. 486, ill.

- See Peterson, C. G.: Wright "Cyclone" engine.

Wright, H. T. ■ Splines and serrations.

Machinery, Vol. 27, No. 687 (Nov. 26, 1925), London, pp, 259-262, ill, "*j .

Weight, Orville. Orville Wright forecasts aircraft expansion.

TJ. S. Air Services, Vol. 10, No. 11 (Nov. 1925), Washington, pp. 20-22, ill.

- Orville Wright gives original airplane to England.

U. S. Air Services, Vol. 10, No. 6 (June 1925), Washington, p. 11.

--Our early flying machine developments.

Slipstream, Vol. 6, No. 1 (Jan. 1925), Dayton, Ohio, pp. 11-15, ill.

—— With Orville Wright in his workshop. Modest man who first took the air tells about the early flights at Kitty Hawk.

New York Times Magazine, New York, February 1, 1925, p. 8, port.

- See Walcott, Charles Doolittle: Orville Wright to give first plane to

England.

Wright, Wilbur. The Wilbur Wright memorial fund..

Journ. Roy. Aero. Soc, Vol. 29, No. 176 (Aug. 1925), London, pp. 335-337.

Wright Aeronautical Corp. Wright Aeronautical Corp. to manufacture the Morehouse engine.

Aviation, Vol. 19, No. 20 (Nov. 16, 1925), New York, p. 719, 111.

Wright first plane. Wright first plane may remain in TJ. S. Slipstream, Vol. 6, No. 6 (June 1925), Dayton, Ohio, p. 5.

Wright-Lanqlet. Both sides of the Wright-Langley controversy. Literary Digest, Vol. 86 (July 4, 1925), New York, pp. 54-56.

- The Wright-Langley controversy.

Aviation, Vol. 18, No. 20 (May 18,1925). New York, pp. 550-551, ill.

- The Wright machine.

Aviation, Vol. 18, No. 23 (June 8, 1925), New York, p. 642.

Wright-Smithsonian. On the Wright-Smithsonian wrangle. Slipstream, Vol. 6, No. 4 (April 1925), Dayton, Ohio, pp. 7, 21.

Wrinch, D. M. Fluid circulation round cylindrical obstacles.

London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 49, No. 289 (Jan. 1925), London, pp. 240-250.

Wtatt, B. H. Mapping our roughest region.

Aero Digest, Vol. 7, No. 5 (Nov. 1925), New York, pp. 604-605, 636, ill.

y

Yawing. See Bradfield, F. B. : Pitching and yawing moments with sideslip on a model aeroplane with zero stagger.

- See Glauert, H. : Calculation of the rotary derivatives due to yawing for

a monoplane wing.

Yobk, J. O. What engineering has done for an old model. The Ace, Vol. 6, No. 1 (June 1925), Qlendale, Cal., p. 6, ill.

French Nieuport.

YosHinA, Yahei. See Obata, Jûichi, and Yahei Yoshida: On the valve method of measuring small motion, with special reference to the precise recording of sounds, pressure variations, and vibrations.

Young, Kennedy. Wings of the rising sun.

Aero Digest, Vol. 7, No. 6 (Dec. 1925), New York, pp. 646-651, 111.

Yvon. La Guerre aérienne.

(Éditions Per Orbem.)

Z

ZR-3. See Burgess, C. P.: The rigid airship ZR-3.

ZR-3. See Dirigibles: Can huge dirigibles supplant our expresses and liners?

Zahm, Albert Francis, R. H. Smith, and F. A. Louden. Air forces, moments and damping on model of fleet airship Shenandoah.

National Advisory Committee for Aeronautics, Report No. 215, Sept. 23, 1925, Washington, Government Printing Office, 1925, pp. 32, ill.,'diagrs., tabls.

Zahm, Albert Francis. Stability equations for airship hulls.

National Advisory Committee for Aeronautics, Report No. 212, June 9, 1925, Washington, " '■■ . Government Printing Office, 1925, pp. 5, ill.

Zavattiero, Enrico. Accrescimento della sensibilità dell' emulsione fotografica mediante illuminazione preliminare.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 4 (15 Aprile 1926), Roma, pp. 24-29 tabls., dlagr.

- Nuovo metodo di indagine sulla regolarità degli otturatori di lastra.

Rend. Teen. Dir. Gen. Genio Costr. Aer., Anno 13, N. 8 (15 Nov. 1925), Roma, pp. 12-18, ills., tabi., diagrs.

- Sulla misura della velocità degli otturatori fotografici.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 5 (15 Maggio 1925), Roma, pp. 1-11, diagr., tabi.

- Sulle caratteristiche delle emulsioni sensibili nei riguardi della fotografia

aerea.

Rend. Teen. Dir. Sup. Genio Costr. Aer., Anno 13, N. 1 (15 gen. 1925), Roma, pp. 17-20, ill

Zeigler, S. J., Jr. The Naval Aircraft Factory. '

Aero Digest, Vol. 7, No. 3 (Sept. 1925), New York, pp. 465-469, 111.

Zeilon, N. On potential problem in the theory of fluid resistance.

Proceedings of the First International Congress for Applied Mechanics, Delft 1924, Delft 1925, pp. 365-371. ,

■Zenith. Les carburateurs Zenith et les moteurs d'aviation. Lyon, Société du Carburateur "Zenith."

Zenith Laboratory at Lyons. The zenith of success.

Flight, Vol. 17, No. 28 (July 9, 1925), London, pp. 442-443, ill.

Zeppelins. Across the ocean in two days seen by Zeppelin builder. . Popular Mechanics, Vol. 43 (Jan. 1925), Chicago, p. 43, ill.

- America's super-Zeppelin.

Flight, Vol. 17, No. 9 (Feb. 26,1925), London, p. 117.

- Modern Zeppelin airships.

Flight, Vol. 17, No. 14 (Apr. 2,1925), London, pp. 202-205.

- See Compton: Balloon. Flying gas bags from Montgolfier to Zeppelin.

- See Diirr, L.: 25 jahre Zeppelin luftschiffbau.

- See Eckener. Modern Zeppelin airships.

- See Eckener, Hugo: Modern Zeppelin airships.

- See Emerson, Raff e : 25 years building Zeppelin airships.

- See Kollmann, Franz: Das Zeppelin-luftschiff.

- See Litchfield, P. W.: Super-Zeppelin airship.

- See Los Angeles: The last Zeppelin—ours.

Zero torque. See Lock, C. N. H., and H. Bateman: Some experiments on airscrews at zero torque, with applications to a helicopter descending with the engine "off," and to the design of windmills.

Zimmerman, A. C, and E. R. Irwin. The clogging of fuel strainers.

TJ. S. Air Service Information Circular, Vol. 6, No. 642 (Oct. 1,1925), Washlngton.p. 3, 111.

Zistler, P. See Schmauss, A., und P. Zistler: Die Deutsche Verkehrsausstellung. Raum 4. Navigation.

Zonta, Magio.. Metodi radioelettrici per la determinazione della rotta degli aeromobili.

L'Aerotecnica, Voi. 5, N. 6 (Settembre-Ottobre 1925), Pisa, pp. 289-300, ill.

Ztjqspitz. Der Zugspitz-Flug.

Aut. Mot. Flugw., 7. Jahrg., Nr. 3 (15. Febr. 1826), Berlin, p. 79, 111.

Zurich. See Jondon: London-Zurich and back on a light plane. Alan Cob-ham's fine performance on a D. H. "Moth."


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