object, and the left side when the eye is at rest. The letters indicate the same parts on both sides; those on the right side are marked with a stroke. A, left, B, right half of the lens: 0, cornea S, sclerotic; cs, canal of Schlemm; vk, anterior chamber J, iris; P, margin of the pupil V, anterior surface H, posterior surface of the lens; R, margin of the lens F, margin of the ciliary processes; A B, space between the two former; the line Z X indicates the thick ness of the lens during accommodation for a near object; Z Y the thickness of the lens when the eye is passive.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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