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 107
Absorption by the Yellow Spot. 91 the part of the retina, on which the axis of the eye falls, as is the case in ordinary vision, and then Ije observed Fig. 21.
Color vision
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