Abstract
THIS book gives a fairly complete account of the practical development of radio-telephony. Accurate descriptions are given of very many types of apparatus. The book, therefore, is more useful for reference than for learning the principles of the art. Little space is devoted to theoretical considerations, but the author mentions some of the difficulties encountered, and indicates possible lines of advance. The bibliography is very complete, some 700 references being given to original papers on the subject.
Telephony without Wires.
By Philip R. Coursey. Pp. xix + 414. (London: The Wireless Press, Ltd., 1919.) Price 15s. net.
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Telephony without Wires . Nature 105, 5 (1920). https://doi.org/10.1038/105005a0
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DOI: https://doi.org/10.1038/105005a0