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Su Song
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Water Clock
A water clock, or clepsydra, measures time by the regulated flow of water into or out of a vessel. Known in Egypt by the New Kingdom and described by Vitruvius, the device was refined into float-driven dials in the Greek and Roman world, into great water-drive…
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Water Clock
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Science Museum
explored by
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Armillary Sphere
built by
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Water ClockA water clock, or clepsydra, measures time by the regulated flow of water into or out of a vessel. Known in Egypt by the New Kingdom and described by Vitruvius, the device was refined into float-driven dials in the Greek and Roman world, into great water-drive…