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TECHNOLOGY
Royston, Angela

Pulleys and Gears

32 pp. | Heinemann | November, 2000 | Library ISBN 1-57572-320-4 $$21.36
(4) 4-6 Machines in Action series. These books introduce simple mechanisms, explain their basic scientific principles, and show how they are used in almost every aspect of civilization, including transportation, architecture, and farming. The simply written texts include instructions for pertinent projects and experiments; questions are scattered throughout each volume. Photos, illustrations, and blocks of text with colored backgrounds contribute to the books' crowded layouts. Bib., glos., ind.
Reviewer: Peter D. Sieruta

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