Abstract
ALTHOUGH the use of the telephone in everyday life is continually extending, yet the theory of its working is known to very few of its users. Some of them know that it is connected with the name of Graham Bell, but beyond this their knowledge does not extend. The object of this little book is to fill up the gaps in the knowledge of an otherwise well-educated man. The subject is much wider than is commonly understood by the public. In a book of this size, therefore, it is only possible to give a very brief account of the physical and mathematical difficulties that had to be overcome before the telephone attained its present perfection.
La téléphonie.
Par Robert Dreyfus. (Collection Armand Colin: section de physique, No. 125.) Pp. 199. (Paris: Armand Colin, 1931.) 10.50 francs.
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La téléphonie . Nature 129, 600 (1932). https://doi.org/10.1038/129600d0
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DOI: https://doi.org/10.1038/129600d0