CONTENTS 11 



BOOK XII. 

 HISTORY OF MAGNETISM. 



PAGE 



CHAPTER I. DISCOVERY OF LAWS OF MAGNETIC PHENOMENA 217 



CHAPTER II. PROGRESS OF MAGNETIC THEORY 



Theory of Magnetic Action 220 



Theory of Terrestrial Magnetism 224 



Conclusion . 232 



BOOK XIII. 



HISTORY OF GALVANISM, OR VOLTAIC ELECTRICITY. 

 CHAPTER I. DISCOVERY OF VOLTAIC ELECTRICITY 237 



CHAPTER II. RECEPTION AND CONFIRMATION OF THE DIS- 

 COVERY OF VOLTAIC ELECTRICITY 240 



CHAPTER III. DISCOVERY OF THE LAWS OF THE MUTUAL 

 ATTRACTION AND REPULSION OF VOLTAIC CURRENTS. 

 AMPERE 242 



CHAPTER IV. DISCOVERY OF ELECTRO-MAGNETIC ACTION. 



OERSTED 243 



CHAPTER V. DISCOVERY OF THE LAWS OF ELECTRO-MAG- 

 NETIC ACTION 245 



CHAPTER VI. THEORY OF ELECTRODYNAMICAL ACTION. 



Ampere's Theory 246 



Reception of Ampere's Theory 249 



CHAPTER VII. CONSEQUENCES OF THE ELECTRODYNAMIC 



THEORY 250 



Discovery of Diamagnetism 252 



