Colour-blindness and Colour-perceptionK. Paul, Trench, Trübner & Company, Limited, 1891 - 311 pages |
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Page 27
... shade . A psycho - physical impression as a whole is made up of the contiguous association of psycho- physical units ; thus there will be the units of colour , form , size and shade . It will be seen that one set of im- pressions cannot ...
... shade . A psycho - physical impression as a whole is made up of the contiguous association of psycho- physical units ; thus there will be the units of colour , form , size and shade . It will be seen that one set of im- pressions cannot ...
Page 28
... shade , and a person with ability for perceiving differences of form , but not those of size , will detect minute errors of form , but overlook very great errors in perspective and other points depending upon size . I have a friend who ...
... shade , and a person with ability for perceiving differences of form , but not those of size , will detect minute errors of form , but overlook very great errors in perspective and other points depending upon size . I have a friend who ...
Page 29
... shade we may have a physical series in which the units vary from white to black . A person with defective perception of shade will put two shades of gray together as exactly alike when the match is markedly incorrect to a normal ...
... shade we may have a physical series in which the units vary from white to black . A person with defective perception of shade will put two shades of gray together as exactly alike when the match is markedly incorrect to a normal ...
Page 31
... shade off into those adjacent to it . We can examine the spectrum in another way - that is , by only observing a small portion at a time , either using shutters to a spectroscope , or letting the spectrum pass through a slit which only ...
... shade off into those adjacent to it . We can examine the spectrum in another way - that is , by only observing a small portion at a time , either using shutters to a spectroscope , or letting the spectrum pass through a slit which only ...
Page 42
... shade with red , orange , or yellow . A rose which consists as nearly as possible of equal parts of red and violet will often be mistaken for green , in the same way as the normal - sighted fail to distinguish an orange made up of red ...
... shade with red , orange , or yellow . A rose which consists as nearly as possible of equal parts of red and violet will often be mistaken for green , in the same way as the normal - sighted fail to distinguish an orange made up of red ...
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Common terms and phrases
absolute psycho-physical units after-image ANNA BLACKWELL blue-green bright brown candidate centre colour-blind person colour-perception coloured glass complementary colours contrast correctly crimson dark daylight defect definite colours Demy 8vo distinguish English Essays examination Fcap Fifth Edition four-unit Fourth Edition Frontispiece gaslight gray greenish Holmgren's Illustrations India junction large number LL.B LL.D luminosity Maps match mistakes modified unit neutral band neutral glasses normal-sighted person obtained olive-green orange painted physical series physical units Pilotage pink Plates Pocket Test points of difference Portrait Post 8vo Prof psycho-physical perception psycho-physical series psycho-physical units pure green purple red and green red end red rays retina rose Royal 8vo Sanskrit scotoma Second Edition seen shade simultaneous contrast Small crown 8vo spectroscope spectrum standard red test for colour-blindness theory Third Edition three-unit tion Translated Trinity House two-unit colour-blind violet violet end visual purple vols wools yellow and blue yellow-brown yellow-green Young-Helmholtz theory