Colour-blindness and Colour-perceptionK. Paul, Trench, Trübner & Company, Limited, 1891 - 311 pages |
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Page
... Gray , for the assistance which they have afforded me in making my investigations . Mr. Gray took the greatest interest in colour - blindness , and spared no trouble to obtain efficient tests . It seems remarkable to me that criticism ...
... Gray , for the assistance which they have afforded me in making my investigations . Mr. Gray took the greatest interest in colour - blindness , and spared no trouble to obtain efficient tests . It seems remarkable to me that criticism ...
Page 29
... gray together as exactly alike when the match is markedly incorrect to a normal - sighted person . This defect is not necessarily associated with diminished colour- perception . Thus we may meet with a person who has excellent shade ...
... gray together as exactly alike when the match is markedly incorrect to a normal - sighted person . This defect is not necessarily associated with diminished colour- perception . Thus we may meet with a person who has excellent shade ...
Page 34
... gray . If the per- ception of difference were not quite so defective as this , the extreme ends of the spectrum would appear feebly coloured , and the remainder gray . The spectrum would appear as nearly all gray , but with a tinge of ...
... gray . If the per- ception of difference were not quite so defective as this , the extreme ends of the spectrum would appear feebly coloured , and the remainder gray . The spectrum would appear as nearly all gray , but with a tinge of ...
Page 35
... gray has disappeared ? As I have shown , the colour will be repre- sented by that colour which in the normal - sighted corre- sponds to the centre of each of the two colours . According to the theory , these centre points ought to ...
... gray has disappeared ? As I have shown , the colour will be repre- sented by that colour which in the normal - sighted corre- sponds to the centre of each of the two colours . According to the theory , these centre points ought to ...
Page 42
... gray have to each other , even for the normal- sighted , is shown by the changeable silks of my Pocket Test . Colour to a person seeing the spectrum like Fig . 9 is scarcely a quality of objects at all . The individual from whom this ...
... gray have to each other , even for the normal- sighted , is shown by the changeable silks of my Pocket Test . Colour to a person seeing the spectrum like Fig . 9 is scarcely a quality of objects at all . The individual from whom this ...
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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