Excerpt from The Philosophical Magazine, Vol. 31: Comprehending the Various Branches of Science, the Liberal and Fine Arts, Agriculture, Manufactures, and Commerce; For June, July, August and September, 1808 Julien LE roy was born at Tours in 1686, and died at Paris in 1759. He had hardly attained his twelfth year when his taste for clo'ck and watch-work first showed itself. His hours of recreation were constantly employed in finish ing some pieces of mechanism, and in reading with avidity all books relating' to-that subject and natural philosophy. About the age of thirteen, he constructed some small pieces of clock-work; and finding the day not sufficiently long for him, he sat up during the night, to study how he might im prove their morions. 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.