Abstract
THIS is a work written with the primary object of forming a manual of instruction for those in the wireless branch of the U.S. Navy, but on account of the clear sketch of the subject it gives, it will probably appeal to a wider circle. The way in which the elementary principles are set forth should be appreciated on both sides of the Atlantic. Details are given of several systems better known in America than here, but French and German methods, as well as some originating from this country, are also dealt with. The book has a breadth of outlook which is refreshing after some works which tend towards making one think that all wireless progress is due to one group of investigators. The author does not favour any one system unduly, although naturally he has to base a certain proportion of his remarks upon the various systems employed in the American Fleet. This includes a good deal of interest regarding the recent developments of the Poulsen arc system, and apparatus up to 1000 kw. is illustrated. We only regret that considerations of space have rather curtailed the treatment of the thermoionic valve, or “electron tube,” and that wireless telephony, as distinct from telegraphy, receives only a passing reference, for it is well known that the American Navy made early advances in this direction. The treatment throughout is non-mathematical; the range covered embraces elementary principles as well as up-to-date methods, and the illustrations are excellent.
Elements of Radiotelegraphy.
Lieut.
Ellery W.
Stone
By, U.S.N.R.F. Pp. vii + 267 + xxxiii plates. (London: Crosby Lockwood and Son, 1920.) Price 16s. 6d. net.
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Elements of Radiotelegraphy . Nature 106, 143 (1920). https://doi.org/10.1038/106143a0
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DOI: https://doi.org/10.1038/106143a0