Excerpt from Principles of Direct-Current Electrical Engineering, Vol. 3 IN lecturing on Electrical Engineering to Second Year Students the author has realised the want in recent years of a really suitable text-book - one which he could recommend as adequately bridging the gap between the several elementary manuals and the many excellent works on specialised branches of the subject. This treatise has been written primarily for the intermediate class-work of Universities and Technical Colleges, the basis being a series of the author's Lectures to second-year Students, with a selection of problems systematically arranged in the order of treatment of the subject. A knowledge of the elementary principles of electrical physics and mathematics has been assumed. In writing the book it has been an aim to give a clear and concise account of the fundamental principles of direct current electrical engineering. The work deals essentially with principles, and whenever possible the methods of applying them are illustrated with numerical and descriptive examples. Only those theories and methods of solving problems have been discussed which experience in design and operation has shown to be of practical utility. 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.