Excerpt from Hydro-Electric Power Electrical Equipment and Transmission, Vol. 2 This volume forms a companion to, and is, in fact, a continua tion Of Volume I. There is no definite point Of division between the two volumes and this treatise was divided into two sections solely to make it less cumbersome and more convenient for reference. The treatments Of many Of the subjects are new and some Of the formulae have never previously been published. Like Vol ume I, this book is founded on experience and accepted practice, and is in no wise an academic treatise. The fundamentals Of electric circuits, discussed - from a physical instead Of a mathematical standpoint, have been included after careful consideration, in the belief and expectation that this portion of the text will be useful and convenient for engineers who already understand the principles of electrical circuits and alternating currents. The author is glad to be enabled to include Mr. H. B. Dwight's chart for the solution of transmis sion line problems, as it constitutes an admirable method Of quick computation and saves both time and labor. With the generally accepted practice Of using steel towers for transmission lines, the author is compelled to take issue. The economical reasons for supporting transmission lines on wood or concrete poles in preference to steel towers seem clear and unescapable. That the Short discussion on this subject will turn the tide Of conventional design from a practice which seems almost universal, is not to be expected and, undoubtedly, the use of steel towers will still continue. For the use Of such engineers as prefer conventionality to economy, a complete discussion of steel towers is included. Much labor has been expended in an attempt to make all mathematical discussions clear and simple. Wherever equations are given, the significance Of the symbols used will be found in close proximity to the equation. 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.