Abstract
ABSTRACT In the February issue of the ‘Annals and Magazine of Natural History ‘I published an outline sketch of a new theory of vision. It was suggested that eyes arose as local modifications of tissue induced by the excessive crowding of pigmented granules at spots most frequently and brilliantly illuminated, and that this crowding of the pigmented granules might be made to explain both the origin of the eye as a structure and its functions as an organ. I now propose, as time and opportunity allow, to compare a few eyes with the tissues out of which they have, or according to the theory they should have, arisen, in order to ascertain how far such comparisons support the theory.
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