xiv CONTENTS. 



FAGK 



Application of the Electric Light to Fishing 281 



Application to Submarine Working 283 



Applications to the Projections on a Screen 

 of Optical Experiments, Photographic 



Transparencies, &c 283 



Public Trials of the Electric Light 289 



Application of the Electric Light to Theatri- 

 cal Representations ... 290 



PART VI. CONCLUSION. 



REVIEW OF FOREGOING STATEMENTS ... ... ... 293 



NOTES AND APPENDICES. 



NOTE A. ON THE INDUCTIVE ACTIONS IN THE NEW 



DYNAMO-ELECTRIC MACHINES 296 



NOTE B. ON THE DUTY OF GRAMME MACHINES ACCOR- 

 DING TO THE RESISTANCE OF THE EXTERNAL 



CIRCUIT 302 



Internal Resistance of the Machine ... 304 



Electro-motive. Force ... 304 



Intensity of the Current ... ... .. 304 



Work transformed into Electricity 305 



Utilizable Work in the External Circuit 306 



Duty 306 



Tension and Quantity Machines 308 



Elements. of the working of Gramme Machines ... 308 



