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Dauerfahet von Lenkballons. Ueber 8 Stunden in die Luft. 



Wien. Luftsch. Zeit., VI Jahrg., Nr. 12 (Dec. 1907), Wien, pp. 261-262. S (3280 



Daunois. See 9463. 



Dauphin, Andr6. L'aerostation a I'exposltion de I'automobile 1906. 



L'Agronautique, 6« ann§e. No. 20 (Jan. 1907), Paris, pp. 13-14. S (3290 



. La fete du comite des dames de I'A.-C. D. F. 



L'Agronautique, 5® annSe, No. 18 (juil. 1906), Paris, pp. 149-150. S (3391 



Dautec. Appareil a6rostatique. 



Les Mondes III, T. 9, 1884, Paris, p. 396. (3293 



David, "SJd. Contribution a I'etude d'un moteur aSrien. 



La Conq. I'Air, 4« annge. No. 18 (sept. 1907), Bruxelles, p. 4. S (339:t 



David, Edmund. See 8152. 



David, L. Die Photographie m. Bromsilber-Gelatine u. d. Praxis d. Moment- 

 j)hotogr. 2. Aufl. 



1889-1890, 8% 2 vols., pp. 254, 149, pi. 7, figs. 193. (3294 



. Solution du problfime de la navigation dans I'air, par la direction des 



aerostats; expose d'un nouveau systeme de direction, par L. David. 



Paris, F. Henry, 1864, 83 p., 1 I., 5 pi. LC (3395 



David, L. und Scolik, Ch. Die Photographie m. Bromsilber-Gelatine. Ausf. 

 Anl. z. allgem. Praxis d. Gelatlne-Emulsions-Prozesses, etc. 



1885, pp. 138, pi. 1, figs. 54. (329<! 



Davidson. See 3179, 4674, 9139. 



Davidson, Geokge L. O. A new flying machine. 



Scient. Amer., Vol. 84, No. 5 (Feb. 2, 1901), New York, p. 72, ill. S (3297 



. Experiments in aeronautics. 



Journal of the Society of Arts, Vol. 43, No. 2192, 1895, London, pp. 90-91. S (3298 



. Flight, and how birds get a rise out of the wind when soaring. 



A6r. Journ., Vol. 2, No. 5, 1898, London, pp. 15-20, figs. 1-5. S (3299 



Davidson, R. 0. A new theory of the flight of birds. 



Washington, Henry Polkinhorn, Printer, 1858, 8°, pp. 1-28, figs. 1. S (3299a 



Davidson, Richard Oglesby. Disclosure of the discovery and invention, and 

 a description of the plan of construction and mode of operation of the 

 aerostat; or, A new mode of aerostation. By Richard Oglesby Davidson, 

 Esq. 



St. Louis, Mo., 1840, 32 p., ills. LC (3300 



Davidson (The) " Gyropter " flying machine. 



Scient. Amer. Suppl., Vol. 67, No. 1744 (June 1909), New York, p. 3.53, ill. 

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Davidson's flying machine. 



Sketch, Vol. 17, No. 219 (April 7, 1897), London, p. 452, ill. LC (3302 



