Abstract :
A series of new products on the subject of electricity has been announced by Product Design Company, Redwood City, Calif., designers of science teaching aids for elementary and junior high schools. The focal point of the new series is a model Hydroelectric Dam and Generator Kit. The dam reservoir is molded from sturdy polystyrene, and materials are provided for pupils to construct their own dam. Extensive use of clear plastic in the generator unit permits full observation of all working parts. An intake tower controls the flow of water through the penstock to operate the turbine generator. The generator unit will also work independently off any faucet outlet. Six volts a-c current are generated — sufficient to light a lamp, ring a bell, or operate a small d-c motor. Accessories include a rectifier and d-c motor, transmission lines and transformer, ammeter, voltmeter, a hydraulic kit, and a kit for teaching magnetism.
