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Raamatud Books 1 - 8 of 8 on II. b of the plate, rather towards yellowish red. " Rule. — This test, which is....
" II. b of the plate, rather towards yellowish red. " Rule. — This test, which is applied only to those completely color-blind, should be continued until the person examined has placed beside the specimen all the skeins belonging to this shade or the... "
Annual Report of the Board of Regents of the Smithsonian Institution - Page 186
by Smithsonian Institution, Smithsonian Institution. Board of Regents - 1878
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COLOR-BLINDNESS: ITS DANGERS AND ITS DETECTION

B. JOY JEFFRIES - 1879
...color-blindness with the signal-colors, and especially to convince, if necessary, the railway employ^s and others who are not specialists, the examination...color, like the red flag used as signals on railways. The color should be that of II. b of the plate, rather towards yellowish red. " Rule. — This test,...
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Color-blindness: Its Dangers and Its Detection

Benjamin Joy Jeffries - 1879 - 312 lehte
...But to be more entirely convinced of the relation of complete color-blindness with the signal-colors, and especially to convince, if necessary, the railway...only serves to corroborate the investigation. " TEST IH. — The red skein is presented to the subject. It is necessary to have a vivid red color, like...
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Color-blindness

Benjamin Joy Jeffries - 1880 - 316 lehte
...green-bliud, and vice versa. places a violet or blue skein side of ITS DANGERS AND ITS DETECTION. 215 ploye's and others who are not specialists, the examination...color, like the red flag used as signals on railways. The color should be that of II. 6 of the plate, rather towards yellowish red. " Rule. — This test,...
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Transactions of the Kansas Academy of Science, 7. köide

Kansas Academy of Science - 1881
...test selects with purple only green and gray, or one of them, is completely greenblind. Test third : The red skein is presented to the subject. It is necessary...color, like the red flag used as signals on railways. This test, which is applied only to those completely color-blind, should be continued until the person...
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Color-blindness: Its Danger & Its Detection

Benjamin Joy Jeffries - 1885 - 335 lehte
...color-blindness with the signal-colors, and especially to convince, if necessary, the railway employe"s and others who are not specialists, the examination...only serves to corroborate the investigation. " TEST HI. — The red skein is presented to the subject. It is necessary to have a vivid red color, like...
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System of diseases of the eye, 2. köide

William Fisher Norris - 1897 - 672 lehte
...and serves only as a confirmation of it. " Test III. — The red skein is presented to the examinee. It is necessary to have a vivid red color, like the red flag used as signals on railways. The color should be that of lib of the plate, rather towards yellowish red. " Rule. — This test,...
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A Handbook of the diseases of the eye and their treatment

Sir Henry Rosborough Swanzy - 1897 - 318 lehte
...trial may be made. It only serves to corroborate the diagnosis. Test lib. The red skein is presented. It is necessary to have a vivid red color, like the red flag used as signals on railways. This test, which is applied only to those either " completely red-blind," or " completely green-blind,"...
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Transactions of the Annual Meetings of the Kansas Academy of Science, 4–7. köide

Kansas Academy of Science - 1906
...test selects with purple only green and gray, or one of them, is completely greenblind. Test third : The red skein is presented to the subject. It is necessary...color, like the red flag used as signals on railways. This test, which is applied only to those completely color-blind, should be continued until the person...
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