LOCKS AND KEYS by Gail Gibbons


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Like last year's Clocks and How They Go, this is a generally colorless explanation, which could interest mechanically-minded kids simply by virtue of the subject matter. Gibbons starts with ancient Egyptain and Greek precursors and concentrates on basic types of locks in use today: the ward lock invented by the Romans about 2000 years ago, the lever-tumbler lock first made in England about 200 years ago, and the 100-year-old Yale lock which goes back to the principle of a 4000-year-old Egyptian version. The pictures help to demonstrate how each one works, but like the text they are plodding and uninspired.

Pub Date: Sept. 3rd, 1980
Publisher: T.Y. Crowell