Egyptian Water Clock of the Outflow Type, 1390-1352 BC.
Egyptian Water Clock of the Outflow Type, 1390-1352 BC.
Plaster cast of early Egyptian water clock or 'clepsydra' from original dating from between 1415-1380 BCE, reign of Amenhotep III, found at Karnak Temple in 1904. Original now in Cairo Museum. It was filled with water, which leaked out slowly indicating the passage of hours. The passage of hours differed according to the month and whether day or night.