Colour-blindness and Colour-perceptionK. Paul, Trench, Trübner & Company, Limited, 1891 - 311 pages |
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... difficulties which he has encountered . I have obtained much valuable information from colour - blind persons relating to facts concerning their colour - perception which they have found inconsistent with the ordinarily accepted views ...
... difficulties which he has encountered . I have obtained much valuable information from colour - blind persons relating to facts concerning their colour - perception which they have found inconsistent with the ordinarily accepted views ...
Page 19
... difficulty as the study of colour without the aid of the spectrum . Taking , for instance ,. odours , we are unable to range these in a series , though . a good deal of light has been thrown upon the subject by Professor Ramsay , who ...
... difficulty as the study of colour without the aid of the spectrum . Taking , for instance ,. odours , we are unable to range these in a series , though . a good deal of light has been thrown upon the subject by Professor Ramsay , who ...
Page 23
... difficulty from other absolute psycho - physical units occupying a position adjacent to them in the series , and so in practice the approximate psycho - physical units are the only ones which receive definite names . To look at the ...
... difficulty from other absolute psycho - physical units occupying a position adjacent to them in the series , and so in practice the approximate psycho - physical units are the only ones which receive definite names . To look at the ...
Page 30
... difficulty in comprehending the theory as described in the foregoing chapter , let him consider that the whole theory is one of perception of difference , and work out on paper the effects of a lessened perception of difference ...
... difficulty in comprehending the theory as described in the foregoing chapter , let him consider that the whole theory is one of perception of difference , and work out on paper the effects of a lessened perception of difference ...
Page 33
... difficulty in indicating the right position . There are , therefore , six definite points of difference in the spectrum , to a normal- sighted observer , corresponding to the centre of each of the colours , red , orange , yellow , green ...
... difficulty in indicating the right position . There are , therefore , six definite points of difference in the spectrum , to a normal- sighted observer , corresponding to the centre of each of the colours , red , orange , yellow , green ...
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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