Electricity

by World Book Encyclopedia and Margaret Whalley

Published 12 December 1961
Presents information on the nature and properties of electricity and magnetism and describes experiments to demonstrate how they work. Includes a multimedia disk containing activities, puzzles, games, and more experiments.

Volcanoes

by World Book Encyclopedia

Published 12 December 1961
Presents information on the different types of volcanoes, where they are located, and what causes them to erupt. Includes a multimedia disk containing activities, puzzles, games, and experiments.

Presents information on the nature of the solar system, discussing its planets, sun, comets, asteroids, and meteors. Includes a multimedia disk containing activities, puzzles, games, and experiments.