...Ten distinct layers are described ascomposing the thickness of the retina... 
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Then let us try red, the brightestcolour to our retina and probably also to the Spiders'...
J. H. Fabre 「The Wonders of Instinct」
...Immediately under the sclerotic we find a very delicate, dark-red membrane,very rich in blood-vessels—the choroid coat—and inside thisthe retina (o), the expansion of the optic nerve (i)...
Ernst Haeckel 「The Evolution of Man」
...separated from it), x thickeningof the horny plate at the point where the lens has severed itself, glcorpus vitreum, r retina, u pigment membrane...
Ernst Haeckel 「The Evolution of Man」
...Some of these rayspassing through a point situated behind the lenses of the eye,strike the retina...
Harold Speed 「The Practice and Science Of Drawing」
...But even from the point of view of the true visualperception (if there is such a thing) that modern art has heard somuch talk of, the copying of the retina picture is not so great asuccess...
Harold Speed 「The Practice and Science Of Drawing」
...But the wordsof Professor Maniel were limned onthe retina of his brain in letters of fire...
Various 「Astounding Stories of Super-Science April 1930」
...The arrangement so far described depicts things on the retina theunaccustomed way up...
Oliver Lodge 「Pioneers of Science」
...Ifyou can not see them at first, turn your eye toward oneside of the field of view, and thus, by bringing their imagesupon a more sensitive part of the retina, you may glimpsethem...
Garrett Serviss 「Pleasures of the telescope」
...Each is individually too small to excite our retina, but as a whole,curiously enough, they are perfectly visible...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...The rays of light which imprint an image on theprepared plate are not exactly the same as those which are chieflyconcerned in the production of the image on the retina of the human eye...
Robert Stawell Ball 「The Story of the Heavens」
...This was a precaution that occurred to me, as there was a possibility that the vertical diameter of the retina might be more or less sensitive than the horizontal one...
Edward Singleton Holden 「Sir William Herschel: His Life and Works」
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