Excerpt from Essays on the Microscope: Containing a Practical Description of the Most Improved Microscopes; A General History of Insects, Their Transformations, Peculiar Habits, and Economy; An Account of the Various Species, and Singular Properties, of the Hydre and Vorticelle The first chapter contains a Short history of the invention and improvements that have been made on the micros_cope, and Father Di Torre's method of making his celebrated glass globules. The second treats of vision, in which I have endeavoured to expla' in a familiar manner the reason of those advantages which are obtained by the use of magnifying lenses; but as the reader is supposed to be unacquainted with the elements of this science, so many intermediate ideas have been necessarily omitted, as must in some degree lessen the force, and weaken the perception of the truths intended to be inculcated: to have given these, would have required a treatise on optics. 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.