Oldest Water Clock Illustration

The oldest printed illustration of a water clock (clepsydras) in any culture, from a Sung edition of the Liu Ching T'u of Yang Chia (c A.D. 1155), enlarged by Mao Pang-Han (c. A.D. 1170). This is a drawing of the archaic inflow type of camp clepsydra described in the Chou Li, with a torch beside it to ward off the frost

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Ching Clepsydra Diagram Horology Keeper Keeping Measure Oldest Sung Telling Time Keeper Time Keeping Time-keeper Time-keeping Time-telling Timekeeping Wang Waterclock

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