CONTENTS. xv 



PAGE 



NOTE C. THE CRITERIA OF THE ELECTRIC LIGHT ... 309 



NOTE D. ON A NEW ARRANGEMENT OF THE WERDER- 



MANN LAMP 312 



NOTE E. ON EDISON'S NEW DISCOVERY 313 



TRANSLATOR'S APPENDIX. No. I. 



ENGLISH EQUIVALENTS OF THE FRENCH DENOMINA- 

 TIONS USED IN THIS VOLUME 314 



TRANSLATOR'S APPENDIX. No. 2. 



RECENT INVENTIONS 315 



Incandescent Lamps 315 



Swan's Lamp 316 



Maxim's Lamp ,, 317 



Edisorts Lamp and Fox-LanJs Lamp ... ... 317 



The Faure Secondary Battery ... 317 



