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Excerpt from Bureau of Standards Journal of Research, Vol. 12: January 1934 The development of the piezoelectric frequency standard provided a great improvement in the accuracy Of the transmissions. Schedules were arranged so that all transmitted frequencies were multiples Of a 100 or 200-kc/s standard. The oscillator was adjusted to the desired frequency by the method Of beats between the transmitter and harmonics Of the standard. A fine adjustment Of the circuit capacitance made possible an accurate frequency setting. 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.