Excerpt from Advanced Laboratory Practice in Electricity and Magnetism The electron tube, because of the multiplicity Of its uses, finds many applications, not only in the art of radio communication, but also in engineering practice and in the general research laboratory. Considerable space has been devoted to this device, as well as to the fundamentals Of the electron theory and the passage Of electricity through gases. 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.