Art Resource - AR925752

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Clepsydra (water clock) indicating hours and chiming, 1617-1619.

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The death of Archimedes at the capture of Syracuse by the Romans, 212 BC (late 19th century).

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Reconstruction of a clepsydra (water clock), invented by Ctesibius of Alexandria, c270 BC (1857).

Reconstruction of a clepsydra (water clock), invented by Ctesibius of Alexandria, c270 BC (1857). Ctesibius (fl270 BC) was an inventor and mathematician who initiated a tradition of great engineers in ancient Alexandria. None of his writings have survived, and his inventions are only known about from references to them made by others. This clock worked by water dripping at a constant rate and raising a float with a pointer. It was only superseded in terms of the accuracy of its timekeeping in the 17th century when Christiaan Huyghens showed how the pendulum could be applied to clocks

Unique Identifier AR925752

Type Image

Purpose Public

Size 2841px × 3684px

Photo Credit HIP / Art Resource, NY

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