HOME-MADE ELECTRICAL TOYS 117
An Electro-magnet Derrick--The Electro-magnet--A
Home-made Switch--The Derrick--The Windlass--The
Hoisting Cables--How the Derrick Works--A Toy Shocking
Machine--The Induction-coil--The Primary-coil--The
Secondary-coil--The Handles--An Interrupter--How the
Interrupter Works--A Toy Electric Motor Truck--The
Wheels--The Upper Shaft--The Belts--The Battery--The
Bi-chromate Battery Fluid--Amalgamating a Zinc
Pencil--The Seat and Canopy-top--The Seat-arms--The
Steering-wheel--The Levers.