Abstract
THE object of this work is to provide a connecting link between the various elementary textbooks, intended for those taking up the study of wireless telegraphy, and advanced treatises dealing with particular aspects or branches of the subject. It does not aim at completeness, but usefully develops certain parts of the theory and practice involved. The author insists upon an adequate appreciation of the structure of the atom and the part played by its constituents for a clear understanding of the phenomena met with in wireless working, and puts forward conceptions which, if not presenting a perfectly true scale model of the atom, at any rate are helpful in fixing the ideas. Another theoretical chapter leads up to explanations of some of the methods used in spark and continuous-wave transmission; and perhaps the most important sections of the book deal with the thermo-ionic valve and the modern methods of its employment for both reception and transmission, upon which so much of the recent advances depends. Other developments dealt with are high-speed automatic transmission and direction finding. A considerable portion of the book is devoted to systems of measurement of electrical quantities adapted to wireless telegraph testing. The author concerns himself only with up-to-date methods, and historical matter does not form part of his scheme.
Wireless Telegraphy and Telephony: First Principles, Present Practice, and Testing.
H. M.
Dowsett
By. Pp. xxxi + 331. (London: The Wireless Press, Ltd., 1920.) Price 9s.
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Wireless Telegraphy and Telephony: First Principles, Present Practice, and Testing . Nature 105, 483 (1920). https://doi.org/10.1038/105483b0
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DOI: https://doi.org/10.1038/105483b0