Did you ever see a clepsydra? Several thousand years ago these water clocks were almost as common as the kitchen clock.
As far back as 1500 B.C. man tried to measure those hours filled with sunlight with the aid of a sundial. But that wasn't very accurate. As the seasons changed, the number of day light hours changed, too.
Over the centuries time took on greater importance, and clocks became more precise and complex. The clepsydra was followed by the hourglass, fire clocks, and mechanical clocks of many shapes and sizes. From these early timepieces came today's atomic clock, the time-teller of the space age.
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Seller: Hammonds Antiques & Books, St. Louis, MO, U.S.A.
hardcover. B006063; 62 pp, black felt pen mark inside front cover, price sticker on back end page hardcover, good dustjacket w/edge tears, contents very good. Seller Inventory # 6063
Seller: New Story Community Books, Marshall, MI, U.S.A.
Hardcover. Condition: Very Good. Seller Inventory # 978069541432U
Seller: Time Tested Books, Sacramento, CA, U.S.A.
Hardcover. Condition: Near Fine. Dust Jacket Condition: Near Fine. 1st Edition. "First Printing E" stated. Near fine plus, if not fine 'Titan' bound hardback in near fine plus, if not fine price-clipped dust jacket. Only trivial signs of age/wear/previous use to book and dust jacket: primarily to head and heel of spine and to fore-edge folds of dust jacket. Seller Inventory # 106346