Abstract
IN preparing a new edition of his well-known study of the propagation of telegraph and telephone currents, Prof. Fleming has taken the opportunity of bringing it in line with both the latest theoretical and the latest practical work in this field. The subject presents a very fine example of mathematical investigation leading to results of far-reaching practical utility, and the author conducts his reader along a logically continuous path from the point where he introduces him in the first chapter to hyperbolic functions of complex angles, to the page near the end where he pauses to show him a picture of a telephone cable with loading coils being laid across the Channel. Telegraph and telephone engineers owe a giseat debt of gratitude to Prof. Fleming for the way he has, at first in his lectures and then in the volume now before us, brought together 50 much valuable work in this complicated subject, to which he himself has been no mean contributor. Perhaps the most valuable feature of the treatment is the way in which he has simplified, so far as possible, the mathematical results of the original Investigators, while at the same time facilitating the building of the bridge from the other end by providing the material to extend the students mathematical resources in the required direction.
The Propagation of Electric Currents in Telephone and Telegraph Conductors.
Prof.
J. A.
Fleming
By. Third edition, revised and extended. Pp. xiv + 370. (London: Constable and Co., Ltd., 1919.) Price 21s. net.
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The Propagation of Electric Currents in Telephone and Telegraph Conductors . Nature 105, 611 (1920). https://doi.org/10.1038/105611a0
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DOI: https://doi.org/10.1038/105611a0