Excerpt from The Philosophical Magazine and Journal, Vol. 60: Comprehending the Various Branches of Science, the Liberal and Fine Arts, Agriculture, Manufactures, and Commerce; For July, August, September, October, November, and December, 1822 Sir, your correspondent Dr. Reade having, in the Num ber for March, favoured us with another paper illustrative of his new System of Optics, I beg to offer a few more observa tions on that interesting subject. 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.