Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 146
f the optic nerve, en-tering the back of the eye, and communicating with the brain. A front view and section through the axis of the eye, shownin the annexed figure, will convey a popular idea of its structure. Itis, as it were, a small camera obscura, by means of which the pic-tures of external… … This wonderful organ may be considered as the sentinel whichguards the pass between the worlds of matter and of spirit, andthrough which all their communications are interchanged. The opticnerve is the channel by which the mind pursues the handwriting ofnature on the retina, and through which it…
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