The Journal of the Quekett Microscopical Club, 1904-1906, Vol. 9 (Classic Reprint)

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Excerpt from The Journal of the Quekett Microscopical Club, 1904-1906, Vol. 9 In general, a ray, passing from the point P to the point Q, and undergoing a total deviation equal to the sum of the angles a and 8, would suffer, in any practical optical system, many refractions, which, however, it is not necessary for our purpose to consider. All that we are concerned with is the total devia tion, and this may be looked upon as though produced by a single refraction only, at the point C, obtained by producing the incident ray and its conjugate ray until they meet as shown. To the point C the name chief point has been given by Professor S. P. Thompson. 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.