Excerpt from A Text-Book on Natural Philosophy, for the Use of Schools and Colleges: Containing the Most Recent Discoveries and Facts Compiled From the Best Authorities It will, therefore, be seen that the plan of this work is essentially the same as that of the text-book on Chem iatry. It gives an abstract of the leading points of each lecture - three or four pages containing the matter gone over in the class-room in the course of an hour. The lengthened explanations and demonstrations which must always be supplied by the teacher himself are, therefore, except in the more difficult cases, here omitted. The object marked out has been to present to the student a clear view of the great facts of physical science, and avoid perplexing his mind with a multiplicity of details. 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.