Ad
related to: clepsydra water clock
Search results
Results From The WOW.Com Content Network
A water clock or clepsydra (from Ancient Greek κλεψύδρα (klepsúdra) 'pipette, water clock'; from κλέπτω (kléptō) 'to steal' and ὕδωρ (hydor) 'water'; lit. ' water thief ' ) is a 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 ...
A water clock or clepsydra is a 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 of liquid can then be measured. Water clocks are one of the oldest time-measuring instruments. [2]
A limestone Egyptian water clock, 285–246 BC (Oriental Institute, Chicago). The oldest description of a clepsydra, or water clock, is from the tomb inscription of an early 18th Dynasty (c. 1500 BC) Egyptian court official named Amenemhet, who is identified as its inventor. [27]
Ctesibius' water clock, as visualized by the 17th-century French architect Claude Perrault. Ctesibius or Ktesibios or Tesibius (Ancient Greek: Κτησίβιος; fl. 285–222 BCE) was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. [1] Very little is known of Ctesibius' life, but his inventions were well known in his ...
Clepsydra, an alternative name for a water clock. In ancient Greece, a device (now called a water thief) for drawing liquids from vats too large to pour, which utilized the principles of air pressure to transport the liquid from one container to another. Clepsydra Geyser in the Lower Geyser Basin of Yellowstone; Clepsydra, a genus of protists
Zhang Sixun (10th century AD), Chinese engineer, clepsydra with water wheel. Su Song (11th century AD), Chinese engineer, clepsydra with water wheel and ratchet. Al-Dschazarī, Arabic engineer and author of the 12th century, elephant clock.
Periods during night or day were measured by a water clock (clepsydra) that dripped at a steady rate and other methods. Whereas the day in the Gregorian calendar commences after midnight, the Greek day began after sunset.
An inflow clepsydra. A clepsydra is a clock that measures time by the flow of water. It consists of a pot with a small hole at the bottom through which the water can escape. The amount of escaping water gives the measure of time.