SUBJECT INDEX 



541 



visual illusions, 127 

 visual search, 123 

 size of object, 40 

 Vision 

 acuity 



night, 73 

 adaptation 

 dark, 6, 77 

 criterion, 16 



function of color of preadapting light, 18 

 function of preadaptation, 18 

 independent in two eyes, 20 

 instantaneous threshold, 13 

 methods of accelerating, 21 

 range, 16 

 rate, 19 



temporal course, 15 

 light, 18 

 color 



rods and cones, 13 

 critical stimulus 



radar scopes, 105 

 discrimination (See Discrimination, visual) 

 inadequacy of information, 3 

 interscientific concepts, 45 

 measurement and nomenclature, 43 

 mechanism, 6 

 rods and cones, 6 

 distribution, 6 

 nervous connections, 7 

 sensitivity, 9, 12 

 night 

 form discrimination, 23 

 perception, 23 



relation to dark adaptation, 23 

 perception, 45 

 stimulus, 3 



characteristics in cormnunication, 256 

 measurement, 4 

 photometry, 6 

 low luminance, 13, 14, 52 

 Visual 



accommodation, 348 

 angle, 84 



communication (See Communication) 

 function 

 color, 357, 366 

 application in submarines, 368 

 influence of illumination, 366 

 in reflecting surfaces, 366 

 meaning, 366 

 paint 

 coordination with lighting, 366, 367 

 effects of glare, 364 

 illumination, 357 

 application in submarines, 368 

 brightness distribution, 357, 364 

 color, 357 

 fluorescent 

 and dark adaptation, 359 

 preference, 359 

 intensity 

 and brightness contrast, 357, 362 

 and efficiency of performance, 357, 363 

 and object size, 357, 361 

 and speed of vision, 357, 361 

 and visual acuity, 357, 360 

 Vital processes, 347 

 Vomiting, 409 



Weavers, 348 



White noise (See Noise) 



