The Water Clock of pharaoh Amenhotep 1390 – 1350 BC


It is one of the oldest clocks in the world. Plaster cast vessel with sloping sides that allowed water to drip or drain out at a constant rate from a small hole near the bottom indicating the passage of hours .The inside of the vessel has 12 columns or scales each marked with the name of the month. It was used by priests to determine the time at night so that the temple rites could be performed at the correct hour. It may have been used in daylight as well. It was found at Karnak Temple of Luxor in 1904. Original now in the Egytian Museum. The passage of hours differed according to the month and whether day or night. 


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