Excerpt from Treatises on Electricity, Galvanism, Magnetism, and Electro-Magnetism For the many deficiencies which I fear the reader will discover in the completion of this design, I have to plead, in extenuation, the very scanty portion of leisure which the continual pressure of my professional duties leaves at my disposal. When I undertook this task, at the request of the Society, above four years ago, I was far from anticipating the extent of the labour it has imposed upon me; and from the multiplied interruptions to which I have been subject, I have been compelled to prosecute the work in a desultory manner, and at irregular and uncertain intervals. 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.