Excerpt from Works on Wireless Telegraphy and Allied Subjects The Preface of a book is the place in which the Author makes his excuses for writing it, or his explanations of its scope and purpose. Following this practice, it may be mentioned that the writer published in 1902 a little book entitled "Waves and Ripples in Water, Air, and AEther," through The Society for Promoting Christian Knowledge, which was a reprint, with some amplifications, of a Course of Christmas Lectures given at the Royal Institution, London. The last chapter of that book contains a brief reference to the then young art of radiotelegraphy. In the years that have since elapsed, this branch of telegraphy has developed with wonderful rapidity into a unique and most valuable means of communication. The importance of it is shown by the fact that three International Conventions and two Parliamentary Committees have deliberated at length on its regulation and condition within the short space of ten years. A large and highly technical literature has grown up around it, and an industry of considerable dimensions been created by it. Its astonishing achievements have raised a desire in the minds of the general public to know something of its mode of operation and possible future development, but in a form divested as far as possible of unexplained technicalities or abstruse formulae. Many of the popular books written with this object seem to the writer to give insufficient explanations of the physical processes involved. 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."