Timekeeping (Discoveries & Inventions S.) - Tapa blanda

Series; Discoveries and inventions. Physical description; 64 pages : illustrations, facsimiles, portraits ; 25 cm. Notes; Includes bibliography and index. Summary; Describes the changing ways of thinking about time, the emergence of the calendar, and the quest for a more accurate means of measuring time. A history of the measurement of time, from earliest attempts to atomic clocks. The book covers changing concepts of time; emergence of the calendar; sundials; water clocks; sandglasses; calibrated candles; water escapements; and pendulum, mechanical, electrical, quartz and atomic clocks. Subjects; Time - History. Clocks and watches - History. Time. Clocks and watches - History - Juvenile literature. Time - Juvenile literature. Time measurements - History. Clocks and watches - History. Timepieces: horology. Clocks - History. Clocks & chronometers ; Science ; History of science. Technology & Engineering / Manufacturing. Juvenile Non-fiction / Science & Nature / General. Science / History. Genre; Illustrated.