Vision and Colour-Vision


    THE difference in physiological effect between incident and reflected light is a commonplace to those who have investigated the influence of surroundings on sensitive animals. The influence du fond is a function of the altered light reflected from these surroundings upon the eyes or skin of animals capable of assuming variable coloration. The direct incident light has little or no effect in producing the result.

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    Vision and Colour-Vision . Nature 78, 90–91 (1908).

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