Colour-blindness and Colour-perceptionK. Paul, Trench, Trübner & Company, Limited, 1891 - 311 pages |
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Page 28
... distance between the adjacent psycho - physical units increases so does the means of recognition diminish . A picture may be inaccurate in colour , form , size , or shade , and a person with ability for perceiving differences of form ...
... distance between the adjacent psycho - physical units increases so does the means of recognition diminish . A picture may be inaccurate in colour , form , size , or shade , and a person with ability for perceiving differences of form ...
Page 29
... distance is too great , etc. In the perception of 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 ...
... distance is too great , etc. In the perception of 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 ...
Page 59
... distance apart . If we now walk backwards from these three lights we shall notice that the yellow - green and blue - green begin to get more and more allied , and at a certain distance the three become almost indistinguish- able from ...
... distance apart . If we now walk backwards from these three lights we shall notice that the yellow - green and blue - green begin to get more and more allied , and at a certain distance the three become almost indistinguish- able from ...
Page 96
... distance from each other in the spectral scale . Thus blue is the true complementary of yellow , but the coloured after - image obtained by looking at a blue object is orange . The after - image obtained by looking at a yellow object is ...
... distance from each other in the spectral scale . Thus blue is the true complementary of yellow , but the coloured after - image obtained by looking at a blue object is orange . The after - image obtained by looking at a yellow object is ...
Page 97
... distance . With regard to shadows coloured by contrast . If we take a piece of ruby - red glass and interpose a pencil between it and a piece of paper , the paper will be coloured red by the transmitted light which passes through the ...
... distance . With regard to shadows coloured by contrast . If we take a piece of ruby - red glass and interpose a pencil between it and a piece of paper , the paper will be coloured red by the transmitted light which passes through the ...
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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