 Description:
The history of timekeeping from ancient to modern methods. Features illustrations and information on sun clocks and water clocks, mechanical clocks and quartz clocks, and atomic beam clocks. The site also has information on Greenwich Mean Time and world time zones. From the National Institute of Standards and Technology (NIST) Physics Laboratory.
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| Resource Specification | | Site URL: | http://physics.nist.gov/GenInt/Time/time.html | | Sponsors: |
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| Category: | Reference :: Time | | Date Added: | April 28, 2007 02:10:31 AM |
| Number Hits: | 24 | | Link Owner: | Dovie Rocha | | Page Rank: |
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