File:Clepsydra-Diagram-Fancy.jpeg
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Clepsydra-Diagram-Fancy.jpeg (375 × 600 pixels, file size: 57 KB, MIME type: image/jpeg)
Summary
Diagram of a fancy clepsydra, this type being an automaton or self-adjusting machine. Water enters and raises the figure, which points at the current hour for the day. Spillover water operates a series of gears that rotates a cylinder so that hour lengths are appropriate for today's date. The ancient Greeks and Romans had twelve hours from sunrise to sunset; since summer days are longer than winter days, summer hours were longer than winter hours.
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 07:53, 3 January 2017 | ![]() | 375 × 600 (57 KB) | 127.0.0.1 (talk) | <p>Diagram of a fancy clepsydra, this type being an automaton or self-adjusting machine. Water enters and raises the figure, which points at the current hour for the day. Spillover water operates a series of gears that rotates a cylinder so that hour lengths are appropriate for today's date. The ancient Greeks and Romans had twelve hours from sunrise to sunset; since summer days are longer than winter days, summer hours were longer than winter hours. </p> |
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