Samuel Halevi, scientist at the court of Alfonso X and inventor of a water-clock, 594.
The water-clock marked the third hour when I had finished my journey.
Sends the two clocks, or rather perhaps the celestial globe and the water-clock.
It was the water-clock, the chronometer, and the weather guide of Athens.
The water-clock, or clepsydra, has been known to the Chinese for centuries.
Notice carefully that this is partly a water-clock and partly a weight-clock.
Another ancient invention for measuring time was the water-clock.
The Djyotisha also teaches the art of constructing a clepsydra, or water-clock.
Even in the seventeenth century scientists in their experiments preferred some form of water-clock.
Cicero having to mention a water-clock is obliged to call it a water sundial (solarium ex aqu).