SUBJECT INDEX 



871 



Ultraviolet photography, 595-602 

 applications of, 600-602 

 filters for, 597-598 

 methods of, 599-600 



Uniform scale, 19 



View finders, 35-36, 80-82 

 Viewing distance, proper, 95-96 

 Viewing instruments, for stereo, 580-583 

 Vignetting, 21, 33, 35 

 Vision, binocular, 577 



normal, 264-265 

 Visual magnitudes and color index, 753-754 

 Voightlander {see Lenses) 

 Voltage, effect of, on incandescent lamps, 158-160 



Washing, of prints, 405-406 



{See also Fixing, washing, and drying) 

 Washing time, minimum, 404 

 Wash-off relief, 150, 640-643 

 Watkins speed scale, 194 

 Watkins and Wynne actinometers, 249 

 Wavelength determinations, 817-819 

 Waxing matte prints, 416 

 Weber-Fechner law, 265 

 Wedges, neutral-tint, 307 

 Weston speed system, 195, 850-854 

 Wynne speed system, 194 



X-ray diffraction, 831-832 



X-ray films, 148 



X-ray photography, 822-823 



W 



Z 



Washing, 399-407 



effect of container on, 406-407 

 multiple-bath, 402-403 



Zeiss {see Lenses) 



Zeiss coupled range finder, 87-89 



Zincke-Sommer, 37 



