Researches in colour vision and the trichromatic theory (1913)
Abney, William de Wiveleslie, Sir, 1843-1920 · London : Longmans, Green · leaf 209
EXTINCTION OF COLOUR AND LIGHT 189 … Fig. 65. The extinction of the light depends on the size of spot of light, and appears to follow the same law as when the eye is dark adapted.
Color Perception · Color blindness · Color vision
Internet Archive · Wellcome Library · Public domain (published before 1931). Free to use for anything.
