Colour-blindness and Colour-perceptionK. Paul, Trench, Trübner & Company, Limited, 1891 - 311 pages |
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Page 33
... asked to which portion of the spectrum it corresponded , without being allowed to com- pare it with other colours , he would find great difficulty in indicating the right position . There are , therefore , six definite points of ...
... asked to which portion of the spectrum it corresponded , without being allowed to com- pare it with other colours , he would find great difficulty in indicating the right position . There are , therefore , six definite points of ...
Page 55
... asked to make seven colours he would add greenish yellow to the list . It has also been pointed out that indigo is a green - blue and not a violet - blue , and therefore could not be placed between the blue and the violet . But under ...
... asked to make seven colours he would add greenish yellow to the list . It has also been pointed out that indigo is a green - blue and not a violet - blue , and therefore could not be placed between the blue and the violet . But under ...
Page 104
... asked him what colour it was . He said , " I should call it a blue ; some people would call it a violet . " I then picked up a very dark blue , and said , " Would you put it with this ? " " No , " he replied , " I should not ; it is a ...
... asked him what colour it was . He said , " I should call it a blue ; some people would call it a violet . " I then picked up a very dark blue , and said , " Would you put it with this ? " " No , " he replied , " I should not ; it is a ...
Page 108
... from the colour - blind , if their remarks be taken down without question . It is absolutely necessary that no leading ques- tions be asked . A colour - blind person who 108 COLOUR - BLINDNESS AND COLOUR - PERCEPTION .
... from the colour - blind , if their remarks be taken down without question . It is absolutely necessary that no leading ques- tions be asked . A colour - blind person who 108 COLOUR - BLINDNESS AND COLOUR - PERCEPTION .
Page 109
... asked : - 1. How long have you found difficulty in distinguishing colours ? 2. What colours do you confuse ? 3. What effect has gaslight upon colours ? 4. Does distance make any difference in the appear- ance of colours ? 5. Are you ...
... asked : - 1. How long have you found difficulty in distinguishing colours ? 2. What colours do you confuse ? 3. What effect has gaslight upon colours ? 4. Does distance make any difference in the appear- ance of colours ? 5. Are you ...
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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