Little did Ctesibius know, but he was perfecting a water system that would eventually be used many years later. Although not the exact version, but the overall concept derived from Ctesibius perfections of the Egyptian idea. His one project that we recognize today is the clock. However it was not the typical clock that we think of, but a water clock, clepsydra. This water clock was made of stone vessels with sloping sides that allowed water to drip at a nearly constant rate from a small hole near the bottom. Hours were marked on
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