NEW YORK
FREDERICK A. STOKES COMPANY
PUBLISHERS
Printed in Great Britain
PREFACE
I gladly take this opportunity of acknowledging the generous assistance I have received in the preparation of this book.
I am indebted to the following firms for much useful information regarding their various specialities:—
Chloride Electrical Storage Co. Ltd.; General Electric Co. Ltd.; Union Electric Co. Ltd.; Automatic Electric Co., Chicago; Westinghouse Cooper-Hewitt Co. Ltd.; Creed, Bille & Co. Ltd.; India Rubber, Gutta Percha, and Telegraph Works Co. Ltd.; W. Canning & Co.; C. H. F. Muller; Ozonair Ltd.; Universal Electric Supply Co., Manchester; and the Agricultural Electric Discharge Co. Ltd.
For illustrations my thanks are due to:—
Marconi’s Wireless Telegraph Co. Ltd.; Chloride Electrical Storage Co. Ltd.; Harry W. Cox & Co. Ltd.; C. H. F. Muller; W. Canning & Co.; Union Electric Co. Ltd.; Creed, Bille & Co. Ltd.; Ozonair Ltd.; Kodak Ltd.; C. A. Parsons & Co.; Lancashire Dynamo and Motor Co. Ltd.; Dick, Kerr & Co. Ltd.; Siemens Brothers Dynamo Works Ltd.; Vickers Ltd.; and Craven Brothers Ltd.
Mr. Edward Maude and Mr. J. A. Robson have most kindly prepared for me a number of the diagrams, and I am indebted to Dr. Myer Coplans for particulars and a diagram of the heat-compensated salinometer.
I acknowledge also many important suggestions from Miss E. C. Dudgeon on Electro-Culture, and from Mr. R. Baxter and Mr. G. Clark on Telegraphy and Telephony.