Excerpt from The Propagation of Electric Currents: In Telephone and Telegraph Conductors
This book is a reproduction, with some amplifications, of the notes prepared by the Author for two Courses of Postgraduate Lectures given by him before the University of London in the Pender Electrical Laboratory in 1910 and 1911, on the Propagation of Electric Currents in Telephone and Telegraph Conductors and on Electrical Measurements in connection with Telephonic and Telegraphic work. These Lectures had their origin in a request made to the University to provide a course of instruction for Telegraphic and Telephonic Engineers which should enable them to keep abreast of the most recent scientific and technical researches in these branches of Electrical Technology.
These Lectures were attended by a large class composed chiefly of practical Telegraphic and Telephonic Engineers and experts; and at the request of many who attended, and some who did not, the Author has written them out for publication.
As a considerable portion of the subject-matter included has not yet found its way into text-books, although distributed through various technical Journals and Proceedings, it seemed probable that a service would be rendered to Electrical Engineers generally if this material were collected and placed in an easily accessible form. Students of this subject are well aware of the great value of the pioneer work of Mr. Oliver Heaviside and of Prof. Pupin in laying the sound theoretical and practical foundations for improvements of great importance in telephony, and of the classical labours of Lord Kelvin in connection with submarine telegraphy. But the study of the writings of these originators makes a demand for mathematical knowledge which is generally beyond the attainments of the practical telegraphic and telephonic engineer.
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