By Jacqueline Engel
.
Fragment of a water clock, with an image of various stars from ten-day periods.
A waterclock or clepsydra (Greekκλεψύδρα from κλέπτειν kleptein, ‘to steal’; ὕδωρ hydor, ‘water’) is any timepiece by which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel, and where the amount is then measured.
Grauwak .
Origin unknown.
Greek Period. 332-30 BC
Egyptian Museum Turin.
LA CIVILTA' EGIZIA 