Excerpt from Telephony, Vol. 5 of 6: A Manual of the Design, Construction, and Operation of Telephone Exchanges; The Substation It w proposed to examine what appears to be the best current practice in the construction of sub-stations, and the lines along which development. Seems likely to take place. The history of the telephone and the theory of the interconvertibility of sound and electricity will only be touched upon collaterally in so far as it may be wise to the development of the subject. 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 techlogy 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.