History of timekeeping devices in Egypt information
Ancient Egyptian sundial (c. 1500 BC), from the Valley of the Kings, used for measuring work hour. Daytime divided into 12 parts.
The ancient Egyptians were one of the first cultures to widely divide days into generally agreed-upon equal parts, using early timekeeping devices such as sundials, shadow clocks, and merkhets (plumb-lines used by early astronomers).[1][2]
Obelisks were also used by reading the shadow that they make[citation needed]. The clock was split into daytime and nighttime, and then into smaller hours.
^"Early Clocks". A Walk Through Time - The Evolution of Time Measurement through the Ages. National Institute of Standards and Technology. 12 August 2009. Retrieved 2022-10-13.
^Whitrow, G. J. (1989). Time in History: Views of Time from Prehistory to the Present Day. Oxford University Press. p. 28. ISBN 978-0-19-285211-3.
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