Theory and Practice of the Electric Telegraph - A Manual for Operators and Students (Classic Reprint)
by Charles Henry Churchill (9781330174944)

Theory and Practice of the Electric Telegraph - A Manual for Operators and Students (Classic Reprint)
Charles Henry Churchill
Format: Paperback / softback
Pages: 164
Category: Electronics Engineering
Publisher: Forgotten Books
ISBN: 9781330174944
ISBN-10: 1330174941

Excerpt from Theory and Practice of the Electric Telegraph: A Manual for Operators and Students The number of very Admirable works published of late, on the subjects treated in this manual, might seem to render its appearance quite unnecessary. The particular form, however, in which it Is written, has been asked for by skillful teachers in the Telegraphic Colleges, and the work meets, therefore, only an Imperative demand. To students not already trained by a thorough general acquaintance with scientific subjects, the form of question and answer presents the readiest means of Investigation, and of satisfaction, also, provided the questions are arranged In n natural and progressive order. At the same time it precludes the construction of those condensed and comprehensive sentences that are often the delight of the advanced scholar. At the risk of some repetitions, the answers in nearly all oases are so worded that the cursory reader may omit the questions entirely without losing the sense or the connection. As to the subject matter a few departures from common method may be noted. First, language adapted only to theories not. now generally received, is, as far as possible, discarded. Second. The idea of polar forces, and the principle of inductive action are made prominent early in the work so that each phenomenon may be explained as it occurs rather than in a general chapter at the end. A little more attention is given to the secondary current than is usual in telegraphic manuals, the discoveries of Mr. Elisha Gray having brought the subject into new prominence. Historical details have been for the most part omitted or briefly touched as the limit of such a work would permit. In the chapters on practical telegraphy I have drawn freely from the works.of Fond, Mattison, Pope and others who have written with much acceptance in this department. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at 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.

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