Colour-blindness and Colour-perceptionK. Paul, Trench, Trübner & Company, Limited, 1891 - 311 pages |
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Page 16
... , so many vibrations per second . But the second itself is quite an arbitrary standard of time , and it is quite possible , and appears to me probable , that there are innumerable degrees 16 COLOUR - BLINDNESS AND COLOUR - PERCEPTION .
... , so many vibrations per second . But the second itself is quite an arbitrary standard of time , and it is quite possible , and appears to me probable , that there are innumerable degrees 16 COLOUR - BLINDNESS AND COLOUR - PERCEPTION .
Page 17
... standard of time , and suppose that there are only 59 seconds in a minute instead of 60 , and then estimate the vibrations per second according to this scale of time . It is evident that nearly every one of the units will have ...
... standard of time , and suppose that there are only 59 seconds in a minute instead of 60 , and then estimate the vibrations per second according to this scale of time . It is evident that nearly every one of the units will have ...
Page 19
... standard length of a psycho - physical series having been found for the majority of persons , any increase in this length for any individual will be a gain , and any decrease a loss for the person examined . When the psycho - physical ...
... standard length of a psycho - physical series having been found for the majority of persons , any increase in this length for any individual will be a gain , and any decrease a loss for the person examined . When the psycho - physical ...
Page 56
... standards of colour for comparison with other classes of persons . A normal - sighted person sees six definite colours , and a little consideration will convince a normal - sighted person that this is the case . These colours are red ...
... standards of colour for comparison with other classes of persons . A normal - sighted person sees six definite colours , and a little consideration will convince a normal - sighted person that this is the case . These colours are red ...
Page 107
... standard saw too much blue . In order to ascertain quan- titatively the degree of the defect we must first exclude colour - blindness due to defective psycho - physical percep- tion , and colour - blindness due to a shortened spectrum ...
... standard saw too much blue . In order to ascertain quan- titatively the degree of the defect we must first exclude colour - blindness due to defective psycho - physical percep- tion , and colour - blindness due to a shortened spectrum ...
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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