CONTENTS. 



CHAPTER VI. 



MEASUREMENT OF CURRENTS, ETC. 



LESSON PAGE 



XXIX. Ohm's Law and its Consequences . . . 307 



XXX. Electrical Measurements 316 



Note on the Ratio of the Electrostatic to the Electro- 

 magnetic Units ...... 326 



CHAPTER VII. 

 HEAT, LIGHT, AND WORK, FROM ELECTRIC CURRENTS. 



XXXI. Heating effects of Currents .... 328 



XXXII. The Electric Light 333 



XXXIII. Electromotors (Electromagnetic Engines) . 337 



CHAPTER VIII. 



THERMO-ELECTRICITY. 



XXXIV. Thermo-Electric Currents .... 342 



CHAPTER IX. 

 ELECTRO-OPTICS. 

 XXXV. General Relations between Light and Electricity 



