Excerpt from The Theory of Coupled Circuits Professor Braun,1 in seeking for some method whereby he could increase the amount of energy available for radiation in wireless telegraphy, without employing excessively high voltages, conceived the idea of using coupled circuits. The advantages of this method over the old method - direct excited antennae - are quite obvious, and are familiar to all students of this subject. By the use of an auxiliary circuit of low resistance and large capacity, we can store up a large amount of energy, and at the same time produce a more prolonged oscillation, which is very important for syntonization. The coupling may be accomplished in two different ways, electromagnetically or direct, as indicated in Figs. 1 and 2. In either case the advantages to be gained are the same. 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.