Chapter IX—HOW TO MAKE AND INSTALL A TELEPHONE.
Chapter X—MEDICAL COILS AND SHOCKING COILS.
Chapter XI—THE CONSTRUCTION OF SPARK COILS. A one-quarter inch Coil, a one-half inch Coil, a one inch Coil. Experiments with Spark Coils.
VOLUME III, No. 9—80 Pages—73 Illustrations
Chapter XII—HOW TO MAKE A DYNAMO-MOTOR.
Chapter XIII—HOW TO MAKE A TOY BATTERY MOTOR.
Chapter XIV—HOW TO BUILD AN ELECTRIC ENGINE.
Chapter XV—MINIATURE BATTERY LAMP LIGHTING.
Chapter XVI—COHERER OUTFITS FOR WIRELESS TELEGRAPHY.
Chapter XVII—HOW TO BUILD A TESLA HIGH FREQUENCY COIL. Experiments with High Frequency Currents.