Page:Airplane photography.djvu/428

 422

Stereoscopic photography, 329 mounting, 346 pictures, fusion of without instru- ments, 330, 343 sights, 338 views, 39, 40, 64 uses for, 348 vision, principles of, 329 Stop-watch attached to shutter release, 310 Strap, on hand camera, to go around observer’s neck, 99 on plate magazine, 87 to go over hand, on hand camera, 100 Stream lines, 26 lined hood, 214 Suction for holding film flat, 131, 132, 142 advantages of continuous and inter- mittent, 132 Surveying by aerial photography, 401

Tank development, 270 Tearing edges of prints, 317 Telephones on planes, 296 Telephoto lens, 61 Temperature, coefficient of develop- ment, 258 effect of on focus, 41 effect of on mechanical functioning, 41, 102, 125 effect of on plate speed, 232 limits of development, 258 Test chart, lens, 52 Threshold value, 230 Thrust, propeller, 152 Timber, location of by aerial photog- raphy, 413 Tone rendering, correct, 226, 230, 239 Touch, sense of, not dependable in plane, 41, 125, 164

INDEX

Trailer, photographic truck and, 268 Transmission of power to camera, 161 Transparencies, 252, 330 Transparency, 227

Trays, camera, 195

’ Tri-color ratio, 235

Triplane, 24

Tuning fork, used in shutter tester, 79

Turbine, wind, for driving camera, 116, 127, 144, 147, 158

Uniformity of curtain speed in focal plane shutter, 76, 82, 84, 86, 315

Unit system of camera construction, 42

Uprights, camera, in plane, 209

Uses for aerial photography, 388

Velocity constant, 258

Veneer construction, 23, 209, 211 Venturi tube, 132, 142, 144

Vibration, 16, 18, 26, 40, 41, 58, 102, 179 Volcanoes, photography of, 15, 399

Water for mixing chemicals, 262 Watkins factor, 258 Weight and head resistance, equiva- lence, 156 of film compared to plates, 101, 130 of deRam camera, 123 of hand cameras, 96 of K type camera, 144 of K film roll, 144 of L type camera, 117 of M type camera, 109 of storage batteries, 157 Wind, flying against, 68, 308 motor, 146

‘Windows in side of plane, 214, 328

Wire, barbed, appearance of in aerial photograph, 360