Chapter I: Introduction: v

I. THE AUTHOR'S DESIGN 1
II. HISTORY OF ELECTRICAL SCIENCE 6
III. HISTORY OF MAGNETISM 20
IV. THEORY AND NATURE OF MAGNETISM 25
V. THEORY OF ELECTRICITY 39
VI. ELECTRICAL CURRENTS 49
VII. ELECTRIC GENERATORS 62
VIII. ATMOSPHERIC ELECTRICITY 77
IX. ELECTRICAL MEASUREMENT 83
X. THE ELECTRIC TELEGRAPH 88
XI. RECEIVING MESSAGES 103
XII. MISCELLANEOUS METHODS 108
XIII. MULTIPLE TRANSMISSION 114
XIV. WAY DUPLEX SYSTEM 129
XV. THE TELEPHONE 134
XVI. HOW THE TELEPHONE TALKS 145
XVII. SUBMARINE TELEGRAPHY 154
XVIII. SHORT-LINE TELEGRAPHS 159
XIX. THE TELAUTOGRAPH 165
XX. SOME CURIOSITIES 171
XXI. WIRELESS TELEGRAPHY 176
XXII. NIAGARA FALLS POWER--INTRODUCTION 186
XXIII. NIAGARA FALLS POWER--APPLIANCES 190
XXIV. NIAGARA FALLS POWER--APPLIANCES 199
XXV. ELECTRICAL PRODUCTS--CARBORUNDUM 209
XXVI. ELECTRICAL PRODUCTS--BLEACHING-POWDER 218
XXVII. ELECTRICAL PRODUCTS--ALUMINUM 223
XXVIII. ELECTRICAL PRODUCTS--CALCIUM CARBIDE 228
XXIX. THE NEW ERA 234