Items related to Clocks, from Shadow to Atom

Clocks, from Shadow to Atom - Hardcover

Kathryn Kilby Borland; Helen Ross Speicher

 
9780695414320: Clocks, from Shadow to Atom

Synopsis

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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