Colour vision : being the Tyndall lectures delivered in 1894 at the Royal Institution (1895)
Abney, William de Wiveleslie, Sir, 1843-1920 · London : S. Low, Marston & Company · leaf 98
82 Colour Vision. normal curve. That these differences do exist is fully shown in Fig. 19. One of the most striking experi- Fig. 19. … ments in colour vision is to place a bright red patch on the screen, and to ask a red-blind to make a match in
Color vision
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