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
CONTENTS
| CHAPTER | PAGE | |
| I. | The Birth of the Science of Electricity | [1] |
| II. | Electrical Machines and the Leyden Jar | [9] |
| III. | Electricity in the Atmosphere | [18] |
| IV. | The Electric Current | [27] |
| V. | The Accumulator | [38] |
| VI. | Magnets and Magnetism | [44] |
| VII. | The Production of Magnetism by Electricity | [56] |
| VIII. | The Induction Coil | [61] |
| IX. | The Dynamo and the Electric Motor | [66] |
| X. | Electric Power Stations | [75] |
| XI. | Electricity in Locomotion | [83] |
| XII. | Electric Lighting | [93] |
| XIII. | Electric Heating | [109] |
| XIV. | Electric Bells and Alarms | [116] |
| XV. | Electric Clocks | [124] |
| XVI. | The Telegraph | [128] |
| XVII. | Submarine Telegraphy | [144] |
| XVIII. | The Telephone | [154] |
| XIX. | Some Telegraphic and Telephonic Inventions | [171] |
| XX. | Wireless Telegraphy and Telephony—Principles and Apparatus | [179] |
| XXI. | Wireless Telegraphy—Practical Applications | [203] |
| XXII. | Electroplating and Electrotyping | [213] |
| XXIII. | Industrial Electrolysis | [224] |
| XXIV. | The Röntgen Rays | [228] |
| XXV. | Electricity in Medicine | [241] |
| XXVI. | Ozone | [247] |
| XXVII. | Electric Ignition | [253] |
| XXVIII. | Electro-Culture | [258] |
| XXIX. | Some Recent Applications of Electricity—An Electric Pipe Locator, etc. | [266] |
| XXX. | Electricity in War | [274] |
| XXXI. | What is Electricity? | [287] |
| Index | [295] |
LIST OF PLATES
| Plate in Colour:The Marconi Transatlantic Wireless Station at Glace Bay, Nova Scotia [Frontispiece] | |
| FACING PAGE | |
| Hydro-Electric Power Station | [30] |
| (a) Experiment to show Magnetic Induction | [48] |
| (b) Experiment to show the Production of Magnetism by an Electric Current | [48] |
| (a) Lines of Magnetic Force of Two Opposite Poles | [50] |
| (b) Lines of Magnetic Force of Two Similar Poles | [50] |
| A Typical Dynamo and its Parts | [70] |
| Lots Road Electric Power Station, Chelsea | [76] |
| Power Station Battery of Accumulators | [80] |
| Electric Colliery Railway | [86] |
| Typical Electric Locomotives | [90] |
| Night Photographs, taken by the Light of the Arc Lamps | [96] |
| Where Electrical Machinery is made | [120] |
| Specimen of the Work of the Creed High-Speed Printing Telegraph | [140] |
| Large Electric Travelling Crane at a Railway Works | [164] |
| (a) Marconi Operator Receiving a Message | [188] |
| (b) Marconi Magnetic Detector | [188] |
| Röntgen Ray Photograph of British and Foreign Fountain Pens | [240] |
| Bachelet “Flying Train” and its Inventor | [272] |
| (a) Cavalry Portable Wireless Cart Set | [280] |
| (b) Aeroplane fitted with Wireless Telegraphy | [280] |