Transcriber’s Notes In this Plain Text version of this eBook, italics are enclosed within ~tildas~, superscripts and subscripts are enclosed in curly braces and preceded by a caret ^{superscript} or an underscore _{subscript}. Other notes will be found at the end of this eBook. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 76, NUMBER 2 HISTORY OF ELECTRIC LIGHT BY HENRY SCHROEDER Harrison, New Jersey [Illustration: FOR THE INCREASE AND DIFFVSION OF KNOWLEDGE AMONG MEN SMITHSONIAN INSTITVTION WASHINGTON 1846] (PUBLICATION 2717) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION AUGUST 15, 1923 The Lord Baltimore Press BALTIMORE, MD., U. S. A. CONTENTS 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