| | PAGE |
| List of Illustrations | [v] |
| Foreword | [ix] |
| Chronology of Electric Light | [xi] |
| Early Records of Electricity and Magnetism | [1] |
| Machines Generating Electricity by Friction | [2] |
| The Leyden Jar | [3] |
| Electricity Generated by Chemical Means | [3] |
| Improvement of Volta’s Battery | [5] |
| Davy’s Discoveries | [5] |
| Researches of Oersted, Ampère, Schweigger and Sturgeon | [6] |
| Ohm’s Law | [7] |
| Invention of the Dynamo | [7] |
| Daniell’s Battery | [10] |
| Grove’s Battery | [11] |
| Grove’s Demonstration of Incandescent Lighting | [12] |
| Grenet Battery | [13] |
| De Moleyns’ Incandescent Lamp | [13] |
| Early Developments of the Arc Lamp | [14] |
| Joule’s Law | [16] |
| Starr’s Incandescent Lamp | [17] |
| Other Early Incandescent Lamps | [19] |
| Further Arc Lamp Developments | [20] |
| Development of the Dynamo, 1840–1860 | [24] |
| The First Commercial Installation of an Electric Light | [25] |
| Further Dynamo Developments | [27] |
| Russian Incandescent Lamp Inventors | [30] |
| The Jablochkoff “Candle” | [31] |
| Commercial Introduction of the Differentially Controlled Arc Lamp | [33] |
| Arc Lighting in the United States | [33] |
| Other American Arc Light Systems | [40] |
| “Sub-Dividing the Electric Light” | [42] |
| Edison’s Invention of a Practical Incandescent Lamp | [43] |
| Edison’s Three-Wire System | [53] |
| Development of the Alternating Current Constant Potential System | [54] |
| Incandescent Lamp Developments, 1884–1894 | [56] |
| The Edison “Municipal” Street Lighting System | [62] |
| The Shunt Box System for Series Incandescent Lamps | [64] |
| The Enclosed Arc Lamp | [65] |
| The Flame Arc Lamp | [67] |
| The Constant Current Transformer for Series Circuits | [69] |
| Enclosed Series Alternating Current Arc Lamps | [69] |
| Series Incandescent Lamps on Constant Current Transformers | [70] |
| The Nernst Lamp | [71] |
| The Cooper-Hewitt Lamp | [72] |
| The Luminous or Magnetite Arc Lamp | [74] |
| Mercury Arc Rectifier for Magnetite Arc Lamps | [77] |
| Incandescent Lamp Developments, 1894–1904 | [78] |
| The Moore Tube Light | [79] |
| The Osmium Lamp | [82] |
| The Gem Lamp | [82] |
| The Tantalum Lamp | [84] |
| Invention of the Tungsten Lamp | [85] |
| Drawn Tungsten Wire | [87] |
| The Quartz Mercury Vapor Arc Lamp | [88] |
| The Gas-Filled Tungsten Lamp | [89] |
| Types and Sizes of Tungsten Lamps Now Made | [91] |
| Standard Voltages | [93] |
| Cost of Incandescent Electric Light | [93] |
| Statistics Regarding the Present Demand for Lamps | [94] |
| Selected Bibliography | [95] |