clepsydra: References & Edit History
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Jonathan D. Betts
Curator of Horology, Royal Observatory Greenwich, National Maritime Museum.
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Article revised and updated. | Jul 13, 2026 | ||
| Add new Web site: Ancient World Magazine - Water clocks. | Aug 05, 2019 | ||
| Add new Web site: Ancient Origins - The Ancient Invention of the Water Clock. | Jul 29, 2019 | ||
| Added new Web site: UBR, Inc. - Clepsydra. | Sep 12, 2007 | ||
| Article revised and updated. | Jan 25, 2007 | ||
| Article added to new online database. | Jul 20, 1998 |
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