Researches in colour vision and the trichromatic theory (1913)
Abney, William de Wiveleslie, Sir, 1843-1920 · London : Longmans, Green · leaf 313
COMPLETE RED AND GREEN BLINDNESS 291 the extinction and dividing by 100, which gives the extinction value when every ray is made of the lumi¬ nosity of 1 candle at 1 foot. The figure gives this value for the red and green blind and for normal vision. It shows the difference in the extinction values. … Fig. 89. — Red and Green Blind Extinction Curves, each ray having originally to them the luminosity of one candle. Normal vision extinction is shown as a dotted line. The extinctions for the “ one-candle luminosity” of each ray is practically the same in the violet for the normal colour vision as…
Color Perception · Color blindness · Color vision
Internet Archive · Wellcome Library · Public domain (published before 1931). Free to use for anything.
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