Excerpt from The Elementary Theory of Direct Current Dynamo Electric Machinery The present book does not cover much ground, but the authors have attempted to present as logical a treatment as is possible in so elementary a work. It is of course intended to be used only as a note book accompanying a course of experimental lectures; many paragraphs require amplification, this being especially the case where the treatment is of the generally accepted type. Where however the treatment difl'ers from that usually adopted, as in the chapter on the magnetic circuit, the notes have been given more fully. 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.