N0 - 3 INDEX 311 



Boiler— continued pAGE 



serpollet type -, ; ' : - 



spray type 70 



tests o£ 70-75, 



tubin S of 70-76 1:1. Ill 



water-tube typo of ; , :; , ,-,, ;: , ,,, 



Bolometer, development of j . :; 



Brake, horse-power 28, 37, 58, 61, 64 69, U7. 223, 224^ 230. 233 



p rony 38, 61, 65. 66. 117,1 79, 222, 228, 233, 249 



Brass, use of -, , ;: . , 1; . , s „ 



Prazmg 117. 17::. L75, 235, 236 



Bronze, aluminum ]14| n , ; 171 |7; , :7 m L , :;? . L , |(1 



Burners, Bunsen type • .- (i ^ -■> ^3 



gasoline 5G, 60, 61, til'. 65, 67, 68, 70-75, 112-110. 110 



shield for 60 67, 95, 115 



Bushing, cast-iron 1 1 .|_ j 1 - | , | 



Buzzard, American, and " John Crow," study of ' 285 



Cameras, telephoto 260, 261 272. 



" Canvas-covered " propellers 84, 17s 



Car, aviator's 185-187, 214, 25l! 252 



launching (see launching apparatus). 



Carbon, energy developed by the use of 27 



Carbonic-acid gas as motive power 11, 24, 26, 28, 29, 30, 53, 54 



liquid 24, 28 



freezing of 28-29 



latent heat of 28 



Carburetor, development of, suitable type of 224, 225, 239, 240, 248, 249, 251, 253, 259 



Carpenter, Frank G., witnesses flights 108 



Cast-iron, use of (see also iron) 114-117. 121, 234-236, 240 



" Cast-off " apparatus 96, 110 



Center of gravity 10, 13-16, 45-52, 0:. 1,!. 80, 91, 103, 11::. 144. 150, 209, 210 



in relation to pressure 10, 11. 15. 40, is, 04. lis. oo, 101, 103 



pressure 7, 10, 11, 13, 15, 45-52, 78, SO, 84, 87, 88. 90, 91, 200, 209, 210 



formulas for 49, 87, S8, 90 



wings and tail It; 



rotation 62 



thrust 62 



Centrifugal pump 241, 248 



Charcoal, as fuel 57 



China silk (see silk). 



Chopawamsic Island. Potomac River 93, L35, !"■ :. is:;, 256 



Chronograph attachments 102. 103. 229 



Circulating pump 114,244 



Clamps, wing S2. 89, 145, 1S3 



Coast and Geodetic Survey 9::, II 



Coefficient of elasticity 1 to 



Coil, spark (sec sparking devices). 



Compressed air 24, 25-26, 68, 112. 113 



Condenser, steam 65 



Construction and tests of large engine 23 1-250 



Construction of frame and engines 53-SO 



of large aerodrome 164-187 



supporting surfaces 188-206 



Control, equilibrium and 77. 7s. no. 2"7-217 



gyroscopic 7s. 2 1 1 



Cooling systems (see water and air cooling). 



Copper, use of 27. 30. 03. 72. 113 115, 1,2 



Copper tubing 35. 56, 57. 59, 1 12. 115, 140, 141. 248 



Counter, speed ''.2. 12". 185, 21.:. 210 



propellers 178 



Covering for tail 86, 103 



wings 54. 63. 77, SI, 86, 88, 90, 148, 194, 195, 205 



Crank bell 110 



starting 2 11 



