Excerpt from Bulletin of the Bureau of Standards, 1915-1916, Vol. 12 The resistance standards are each connected in series with a mutual inductance, as indicated in Fig. 1 and excited by alter nating currents substantially in quadrature. The constants of the circuits and the relative phase and magnitude of the two currents are then adj usted so that no current flows in either galvanometer. 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.