CONTENTS. 



PAGE 



INTKODUCTION 1 



CHAPTER I. 



SEAECH AFTEB A CENTEAL LAW IN THE PHENOMENA OP AETIFI- 

 CIAL FOECE. 



The connexion between artificial electricity, magnetism, light, 

 heat, chemical action, and motion, not separable ... 8 



This connexion indicates a concealed central law ... 8 



Search after this central law in the phenomena of electricity . 9 



Identity of the different kinds of electricity .... 9 



Identity of voltaic and ordinary electricity .... 9 



Apparent difference a difference of quantity, and not of kind . 16 

 A 3 



248203 



