An introduction to the study of colour vision (1915)
Parsons, John Herbert, Sir, 1868-1957 · Cambridge [Eng.] University Press; New York, G. P. Putnam's Sons · leaf 32
ofrhodopsin in both fowls and pigeons, but in far less amount than in man,ox, frog, etc. There was more present in the hawk, buzzard, goose andduck. Amongst reptiles the crocodile possesses many rods and is richin visual purple. Electrical Changes. The retina, connected through…
Color vision
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