Wireless Telegraphy And Telephony Without Wires

Excerpt from Wireless Telegraphy and Wireless Telephony: An Understandable Presentation of the Science of Wireless Transmission of Intelligence Wireless telegraphy was the subject of earnest experimentation as early as 1838, but as far as the public mind is concerned the science began when Marconi sent his first message across the Atlantic from Cornwall to Nova Scotia in 1902. This wonderful accomplishment, like the startling application of the X-rays by Roentgen, had so much of the spectacular element in it, that wireless telegraphy and Marconi became famous at once. The notable rescues of the passengers of the Republic and the Titanic by the aid of wireless messages have only heightened this interest, and it was to satisfy the demand for a practical and understandable presentation of the subject that this little book has been published. The development of the wireless telegraph is carried out logically from the early forms to the latest adaptations of the most important systems. The discussion also includes its application to the aeroplane and dirigible. Wireless Telephony, seemingly even more mysterious than telegraphy, is being rapidly developed, the entire absence of the disturbing noises, so characteristic of the land telephone, making this mechanism especially attractive. Its use between ship and shore for considerable distances has long since passed the experimental stage. 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.

Excerpt from Manual of Wireless Telegraphy and Telephony The tremendous strides in wireless during the past ten years have necessitated a revision of this Manual. In the matter of improved apparatus the alternating current transformer has largely taken the place of the induction coil and the auto receptor has all but superseded the coherer receptor in practical installations, with the result that both the working and the efficiency of stations have been greatly improved. Due to these and other advances it has been found expedient to segregate the chapter on The Apparatus of a Commercial Station and treat the transmitting and the receiving instruments separately. Aerials is a subject to which much new text has been added since the flat-tops or T aerial has come into general use together with better methods of suspension than those treated of in the previous editions of this Manual. Furthermore, considerable useful data have been appended under the caption of Suggestions to Operators relating to the management of stations. 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.

Includes "Literature".

First published in 1921, this book was originally intended to supplement the knowledge of electrical engineers with limited experience of wireless telegraphy. Turner examines various branches of the technology's development, focusing especially on the thermionic method of wireless, and compares telegraphy to telephony. This book will be of value to anyone with an interest in the history of science, telegraphy in particular.