
By Dr. J. A. FLEMING, F.R.S., - PROFESSOR OF ELECTRICAL ENGINEERING, UNIVERSITY COLLEGE, LONDON.
This work offers a clear, step‑by‑step guide to the science behind wireless telegraphy using Hertzian waves, aimed at readers who know the basics of electricity but aren’t specialists. It begins by explaining how a transmitter creates rapid electrical disturbances—much like a siren generates sound—so that a wave can travel across the ether without wires. The author then describes the essential components of the transmitting apparatus, especially the radiator that shapes and launches the wave.
The second part turns to the receiving side, detailing how the faint signals are captured and interpreted back into Morse code. It also touches on practical questions of privacy and signal isolation, showing how early engineers tackled interference and security. Throughout, the language stays accessible, using familiar analogies to demystify a technology that captured the public’s imagination at the turn of the century.
Language
en
Duration
~4 hours (278K characters)
Publisher of text edition
Project Gutenberg
Credits
Produced by Robert Cicconetti, Tim Madden and the Online Distributed Proofreading Team at https://www.pgdp.net (This file was produced from images generously made available by The Internet Archive/American Libraries.)
Release date
2012-01-08
Rights
Public domain in the USA.

1849–1945
A pioneer of electronics, he helped lay the groundwork for modern radio with the 1904 invention of the Fleming valve, one of the first practical vacuum tubes. He also taught generations of engineers and became closely associated with the early growth of wireless communication.
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