Excerpt from The Bell System Technical Journal, 1927, Vol. 6: A Journal Devoted to the Scientific and Engineering Aspects of Electrical Communication With the rapid development of electro-technics an increasing number Of problems is being encountered where the application Of classical electric circuit theory is Of doubtful validity, or where the conclusions derived from it must be interpreted with great care. Such problems are the result not only Of the use of very high frequency in radio transmission but arise also in connection with the need Of a more precise theory Of wire transmission. 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.