James Wood
Published: 2015-07-21
Total Pages: 506
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Excerpt from The Elements of Optics: Designed for the Use of Students in the University Art. 1. By Optics we understand that branch of Natural Philosophy which treats of the nature and properties of Light, and the Theory of Vision. 2. Modern Philosophers have made two hypotheses to explain the manner in which vision is produced by luminous objects. Des Cartes, Huygens and Euler, suppose that there is a subtile, elastic medium which penetrates all bodies, and fills all space; and that vibrations, excited in this fluid by the luminous body, are propagated thence to the eye, and produce the sensation of vision, in the same manner that the vibrations of the air, striking against the ear, produce the sensation of sound. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.