clepsydra

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Ancient Egyptian alabaster water clock with a cylindrical shape and 12 carved columns, each containing 11 small false holes representing the hours of the night. The pale stone vessel is carved inscriptions and dates to the reign of Amenhotep III (1386 to 349 BCE).

A 14th-century Chinese clepsydra, or water clock, consisting of connected vessels used to measure time through the controlled flow of water. The device demonstrates an early method of timekeeping in China.

clepsydra: Media

timekeeping device

Images

Ancient Egyptian alabaster water clock with a cylindrical shape and 12 carved columns, each containing 11 small false holes representing the hours of the night. The pale stone vessel is carved inscriptions and dates to the reign of Amenhotep III (1386 to 349 BCE).

The clepsydra of Karnak

This ancient Egyptian alabaster water clock used in a temple at Karnak dates to the...

© Werner Forman—Universal Images Group/Getty Images

A 14th-century Chinese clepsydra, or water clock, consisting of connected vessels used to measure time through the controlled flow of water. The device demonstrates an early method of timekeeping in China.

A 14th-century Chinese clepsydra

This device, which was used to measure time through the controlled flow of water...

© Chronicle/Alamy

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