19. Paths of aerodrome flights, May 6 and November 28, 1896, near Quantico, Va., on the Potomac River … 108 20. Instantaneous photograph of the aerodrome at the moment after launching in its flight at Quantico on the Potomac River, May 6, 1896. Enlarged ten times … 108 21. Instantaneous photograph of the aerodrome at a distance in the air during its flight at Quantico on the Potomac River, May 6, 1896. Enlarged ten times … 108 22. Instantaneous photograph of the aerodrome at a distance in the air during its flight at Quantico on the Potomac River, May 6, 1896. Enlarged ten times … 108 23. Overhead launching apparatus … 108 24. Overhead launching apparatus … 108 25. Side view of steel frame of aerodrome No. 5 suspended from launching-car, October 24, 1896 … 112 26A. Dimensioned drawing of boiler coils, burners, pump, needle valve, and thrust bearing … 116 26B. Dimensioned drawing of engine No. 5 … 116 27A. Side and end elevations of aerodrome No. 5, May 11, 1896 … 116 27B. Aerodrome No. 5. Plan view. October 24, 1896 … 116 28. Steel frame of aerodrome No. 6 on launching car … 120 29A. Plan view of aerodrome No. 6. October 23, 1896 … 122 29B. Side elevation of aerodrome No. 6. October 23, 1896 … 122 30. Plan view of steel frames and power plants of aerodromes Nos. 5 and 6 … 122 31. Details of aerodrome No. 5 … 122 32. Drawings of proposed man-carrying aerodrome, 1898 … 130 33. Path of flight of aerodrome No. 6, June 7, 1899 … 136 34. Paths of flight of aerodrome No. 6, June 13 and 23, 1899 … 140 35. Aerodrome No. 5 on launching-ways … 142 36. Paths of flights of aerodrome No. 5, July 29, 1899 … 148 37. Experimental forms of superposed surfaces, 1898, 1899. (See also plates 64 and 65.) … 153 38. House-boat and launching apparatus, 1899 … 156 39. Method of attaching guy-wires to guy-posts to relieve torsional strain … 158 40. General plan and details of launching-car … 160 41. Aerodrome on launching-car … 160 42. Details of clutch-post for launching-car … 160 43. Front end of track just preparatory to launching aerodrome … 160 44. Resistance of wires at given velocities … 166 45. Frame of aerodrome A, January 31, 1900 … 168 46. Frame of aerodrome A, January 31, 1900 … 168 47. Frame of aerodrome A, February 1, 1900 … 168 48. Frame of aerodrome A, February 1, 1900 … 168 49. Guy-wire system, July 10, 1902 … 170 50. Guy-wire system, July 10, 1902 … 170 51. Guy-wire system, July 10, 1902 … 170 52. Scale drawing of aerodrome A. End elevation … 170 53. Scale drawing of aerodrome A. Side elevation … 170 54. Scale drawing of aerodrome A. Plan … 170 55. Frame fittings and guy-wire attachments, etc. … 174 56. Frame fittings and guy-wire attachments, etc. … 174 57. Frame fittings and guy-wire attachments, etc. … 174 58. Bed plate gears, etc. … 176 59. Wing clamps … 183 60. Hoisting aerodrome to launching-track … 184