Présentation de l'éditeur
Jh the present Edition I have not only taken advantage, as far as poaeible, of the many friendly snggestions which have been made to me especially by Dr. A. Mnirhead) for the improvement of the Cfriginal work, but have added a considerable amount of new matter, besides thoroughly revising the old. I have to thank Messrs. Elliott Brothers, Messrs. Latimer Clark, Muirhead and Co., Mr. B. Pell (of Messrs. Johnson and Phillips s), Messrs. Nalder Brothers, and Mr. P. Jolin, for many of the illustrations of apparatus. I am also indebted toM essrs. W. T. Glover and Co. for permission to insert their Table (III.) of theW eights, Resistances, c., of Pure Copper Wire, and toM r. Herbert Taylor for the Table (XII.) of data of recent Submarine Cables. H. H. K. KK lK Tkician sD epartment, General Post Office. London, October
(Typographical errors above are due to OCR software and don't occur in the book.)
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