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Research on Scale and Precision of the Water Clock in Ancient China
International Astronomical Union Colloquium
The instruments of measuring time have been closely related to astronomy, especially to astrometry. In ancient China, before mechanical clocks were imported from European countries, accurate Water Clocks, main tools for measuring time, had been developed two thousand years ago.In this paper the sizes (mainly the height) of five single vessel-type Clocks of Western Han Dynasty (206 B.C.-25 A.D.), which were either unearthed in recent years or recorded in some historical documents, are taken as adoi:10.1017/s025292110010586x fatcat:ajoz5nvqdrckrazloyjj4z4zsi