Excerpt from Elements of Radio Telephony The phenomenal popularity into which radio telephonic broadcasting has sprung has been the means of interesting thousands in radio transmission. To the non-technical reader the transmission of speech and music with no visible means of intercommunication is somewhat of a mystery. While it is mysterious it is no more mysterious than the production and recognition of light, for radio and light waves are of exactly the same nature. The relation of radio and light waves is the same as that existing between red and blue light, it is merely a matter of frequency. Of course the "colors" of the radio spectrum are invisible as far as the human eye is concerned and the radio receiver is nothing more than an artificial eye sensitive to these extremely low-frequency "colors." This little volume has a three-fold purpose: first, to present in simplified form a brief discussion of what happens when messages are sent and received by radio; secondly a brief, simplified description of the apparatus required to produce these effects and how it operates; and lastly, practical unbiased information for the experimenter who desires certain results but who does not know what apparatus is necessary. The use of mathematics has been almost entirely avoided and the treatment in most cases is qualitative rather than quantitative. 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 Radio Telephony for Amateurs Truly Of the making Of many books there is no end and in view Of the large number Of radio books already existant and advertised as in the process Of preparation or printing, perhaps some justification is necessary for the appearance Of another. My apologia is a simple one, and possibly one engendered by ideas and aspirations not un familiar to all other radio amateurs. Since connecting up my first receiving apparatus in 1908 I have longed for the appearance of a certain type Of radio book; a book issuing preferably from the pen Of an amateur, radiating the true amateur Spirit Of inquest and investigation, a book chock full Of practical information and suggestions for new things to do and instructions for going about it, in a word, a book which would at once ignite the spark Of my enthusiasm and furnish the material for its combustion. Such a book has never appeared, nor ever shall for the great majority Of us, for we have all our own ideas as to what the ideal radio book for amateurs Should be like. But intercourse extending over a number Of years with kindred spirits and frequent discussions with them on this subject has induced the belief that in the main our ideas converge in a common channel. This book represents my conception Of the direc tion and breadth Of this channel. 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 Radio Telephony Since the publication of Dr. Erskine-Murray's excellent translation of Ruhmer's "Drahtlose Telephonie," there has appeared no complete exposition in any language, so far as the author is aware, of the important and growing field of radio telephony. The date of publication of Ruhmer's book was 1907, and in the succeeding decade advances have been made which render the methods there described obsolete. Accordingly the author has accepted the considerable task of writing a full description of the radio telephonic methods of the present in the thought that he might thus contribute to progress in that valuable art. Wherever possible, sufficiently complete descriptions of the apparatus employed have been given to enable the person skilled in the art to duplicate the results and to judge their value. In this connection, the ranges of transmission and the output power of the radiophonic stations have been presented. It has been thought, too, that the arrangement of apparatus in the set was of value in that it indicated how the various designers had attacked the problem of making radiophonic apparatus readily usable. It need hardly be stated that a good working knowledge of the methods and principles of modern radio telegraphy is necessary for the full appreciation of the material here set forth, though certain questions. common to both types of communication have been here considered in detail. The author desires to express his deep indebtedness for the valuable assistance in the form of information, illustrations, and diagrams which he has received from the following gentlemen and the organizations with which they are connected: Atlantic Communication Company and Messrs. Boehme, Brockmann and Reuthe; Compagnie Generale de Radiotelegraphie, and Lieutenants Colin and Jeance of the French Navy; Lieutenant W. Ditcham of the British Army; Mr. William Dubilier; Federal Telegraph Company and Mr. Leonard F.Fuller; General Electric Company and Messrs. E.F. W. Alexanderson, Albert W. Hull, and William C.White; Mr. W. Hanscom; Marconi Wireless Telegraph Company of America and Mr. Roy A. Weagant; National Electric Signaling Company and Mr. John L.Hogan, Jr.; Radio Telephone and Telegraph Company and Dr. Lee de Forest; Mr. Bowden Washington; Mr. Eitaro Yokoyama. Through their kindness he has been enabled to present here much important information and previously unpublished material. He also desires to commend highly the painstaking efforts of the editors of The Wireless Press to make this book measure up to the high aims of that organization. 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.

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Excerpt from Radio-Telephony for Everyone; The Wireless: How to Construct and Maintain Modern Transmitting and Receiving Apparatus The author has therefore accepted the task of writing a simple explanation of the working theory of radio in general, and the radiophone transmitter and receiver in particular, so that the boy of sixteen and the man of sixty will read it with equal interest and satisfaction. The work will deal in detail with the different types of receiving sets, antenna construction, data on crystal and vacuum tube detectors, and the care of apparatus; in fact, all the data necessary to install and keep in operation a modern radio phone. 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.