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 ...
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 ...
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]
Category:Egyptian hieroglyphs: fishes and parts of fishes (0) L § Invertebrata and lesser animals: Category:Egyptian hieroglyphs: invertebrates and lesser animals (3) M § Trees and plants: Category:Egyptian hieroglyphs: trees and plants (6) N § Sky, earth, water: Category:Egyptian hieroglyphs: sky-earth-water (16) NU § Upper nile
Clepsydra may refer to: 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.
Water clocks or clepsydra measure a gain or loss of water by using drops of uniform size and frequency. The Persian fenjaan made use of the constant time it took for the sinking of a floating bowl with a hole in its underside. It is unknown when or where the oil-lamp clock was first introduced. This clock was mainly used during the mid-18th ...
The Egyptian screw, used to lift water from the Nile, was composed of tubes wound round a cylinder; as the entire unit rotates, water is lifted within the spiral tube to the higher elevation. A later screw pump design from Egypt had a spiral groove cut on the outside of a solid wooden cylinder and then the cylinder was covered by boards or ...
"Book Review: Korean Water-Clocks: "Chagyongnu", the Striking Clepsydra, and the History of Control and Instrumentation Engineering". Technology and Culture . 39 (3): 553– 555.