How to Make a Small Battery Rheostat for Regulating the Speed of Small Motors, Etc. .............................................. CHAPTER VIII. HOW TO MAKE A TELEGRAPH KEY AND SOUNDER AND INSTALL A TELEGRAPH LINE. ................................................... CHAPTER IX. HOW TO MAKE AND INSTALL A TELEPHONE. .................. CHAPTER X. MEDICAL COILS AND SHOCKING COILS. ...................... CHAPTER XI. THE CONSTRUCTION OF SPARK COILS. ...................... Experiment 1—An Imitation Gassiot’s Cascade. .................... Experiment 2—A Ghostly Light .................................... Experiment 3—Lighting Geissler Tubes. ........................... Experiment 4—Flickering Light. .................................. Experiment 5—Rotating a Geissler Tube. .......................... Experiment 6—Fluorescent Writing. ............................... Experiment 7—An Electric Bomb. .................................. Experiment 8—Electrifying the Garbage Can. ...................... Experiment 9—How to Make an Electric Spark Photograph Itself. ... CHAPTER XII. HOW TO MAKE A DYNAMO-MOTOR ........................... CHAPTER XIII. AN ELECTRIC BATTERY MOTOR. .......................... CHAPTER XIV. HOW TO BUILD AN ELECTRIC ENGINE. ..................... CHAPTER XV. MINIATURE BATTERY LIGHTING. ........................... CHAPTER XVI. COHERER OUTFITS FOR WIRELESS TELEGRAPHY. ............. CHAPTER XVII. HOW TO BUILD A TESLA HIGH FREQUENCY COIL. ........... CHAPTER XVIII. AN EXPERIMENTAL WIRELESS TELEPHONE. ................ CHAPTER XIX. MISCELLANEOUS EXPERIMENTS AND APPARATUS. ............. ELECTROLYSIS. ................................................... ELECTROPLATING. ................................................. ELECTRIC CURRENT GENERATED BY HEAT. ............................. A HANDY LIGHT. .................................................. AN EXPERIMENTAL ARC LAMP. ....................................... A MAGNETIC DIVER. ............................................... THE MAGNETIC FISH. .............................................. A MAGNETIC CLOWN. ............................................... AN ELECTRIC BREEZE. ............................................. A STATIC MOTOR. .................................................