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Electricity

Chapter 2: PREFACE
By W. H. McCormick
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About This Book

A popular survey traces the development of electrical science from early observations of lightning through foundational experiments and apparatus such as electrostatic machines and the Leyden jar, then explains fundamental concepts—electric current, magnetism, induction, accumulators, dynamos—and describes technologies built on them, including motors, lighting, heating, telegraphy, telephony, wireless, submarine cables, and electrochemical processes. It also examines medical uses, X-rays, ozone, agricultural electro-culture, industrial electrolysis, ignition systems, and wartime applications, combining technical descriptions, diagrams, and practical examples for a general readership.

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.

Amongst the many books I have consulted I am indebted specially to Electricity in Modern Medicine, by Alfred C. Norman, M.D.; Growing Crops and Plants by Electricity, by Miss E. C. Dudgeon; and Wireless Telegraphy (Cambridge Manuals), by Prof. C. L. Fortescue. I have derived great assistance also from the Wireless World.

Finally, I have to thank Mr. Albert Innes, A.I.E.E., of Leeds, for a number of most valuable suggestions, and for his kindness in reading through the proofs.

W. H. McC.

Leeds, 1915