01311cam a2200325 4500 9769517 TxAuBib 20040929120000.0 ||||||s2004||||||||||||||||||||||||und|u 2002156680 9780823989935 lib. bdg. 0823989933 lib. bdg. 9780823989171 pbk. 0823989178 pbk. TxAuBib Levy, Janey. Keeping time through the ages : the history of tools used to measure time / Janey Levy. New York : PowerKids Press, 2004. 32 p : ill. (some col) ; 23 cm. PowerMath Includes index. Measuring time with the sun -- Water clocks and sand clocks -- Candle clocks and incense clocks -- Mechanical clocks -- Quartz clocks and atomic clocks. Examines how time has been measured through history, by such methods as observation of natural cycles and different kinds of clocks and watches. 4.8 Follett Library Resources. 3-6. Time measurements Instruments Juvenile literature. Time measurements. Clocks and watches. PowerMath.