Woraus water clock (clepsydra) besteht
Measuring time by the outflow of water.
- Vessel with an outflow hole — hat als Teil. Water flows out at a nearly constant rate.
- Water level markings — hat als Teil. Hour marks on the wall.
- Gravity flow — nutzt. Water flows out at a constant rate under gravity.
- Stone — ist hergestellt aus. The clepsydra from Karnak is a stone vessel.