Preface
Wireless Telegraph is mentioned in almost every publication of to-day, and enters into conversation between all; yet how few really know what it means.
There have been several books written on the subject for the expert or technical man, but so far nothing has been written that explains it in a way that every one may understand.
In this book the authors use simple expressions, containing no technical words, so that all may obtain a clear idea of the inception and development of this much-talked-of art.
We here describe the substance through which signals are sent, the theory of the propagation of waves, method of generating and receiving the waves, the apparatus used, and, finally, the uses, limitations, and possibilities of wireless telegraphy both commercially and financially.
Providence, R. I.
New York.
Walter W. Massie.
Charles R. Underhill
- July 15, 1908.
iii
