Excerpt from Cyclopedia of Applied Electricity, Vol. 3 of 6: A General Reference Work on Dynamo-Electric Machinery, Generators, Motors, Storage Batteries, Electric Wiring, Electrical Measurements, Electric Lighting, Electric Railways, Power Stations, Power Transmission, Alternating Current Machinery, Telephony Etc Of Thomas Neal]. Electrical Engineers. New York City Formerly Chief Electrician. Cooper Hewitt Electric Co. 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.