Excerpt from A Manual of Natural Philosophy: Compiled From Various Sources, and Designed for Use as a Text-Book in High Schools and Academies The compiler of the following pages deems no apology necessary for offering to the public another work on Natural Philosophy. Of the several works on this subject now before the public, and with the same general design as the present, each one, no doubt, possesses its own peculiar excellencies, and is adapted, more or less, to aid in advancing the great cause of education; but in the multitude of seminaries of learning, of different grades, in our country, considerable variety in the text-books used is absolutely necessary. Without claiming for the pres ent work, therefore, superiority in every respect over others that have appeared before it, it is believed that an appropriate place will be found for it, as an assistant in promoting the cause of general education. 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.