Ctesibius of Alexandria
This article has been reviewed by the following Topic Editor: Tom Lawrence
Ctesibius' Water Organ.
Ctesibius of Alexandria (c. 285-222 BC), a Greek physicist and inventor, regarded as the first great figure of the ancient engineering tradition of Alexandria, Egypt. Ctesibius discovered the elasticity of air and invented several devices using compressed air, including force pumps and an air-powered catapult. He also improved the water clock, in which water dripping at a constant rate raised a float with a pointer; and a hydraulus (water organ), in which the weight of water forced air through the organ pipes.
Cutler J. Cleveland (Lead Author);Tom Lawrence (Topic Editor) "Ctesibius of Alexandria". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth August 24, 2008; Last revised Date August 24, 2008; Retrieved May 19, 2013 <http://www.eoearth.org/article/Ctesibius_of_Alexandria>