Guericke, Otto von

(redirected from Guericke)
Also found in: Dictionary, Wikipedia.

Guericke, Otto von

(ô`tō fən gā`rĭkə), 1602–86, German physicist, noted for his study of pneumatics. He carried out his most important researches while burgomaster (1646–81) of Magdeburg. In the course of his attempts to create a vacuum he made the first air pump (c.1650). To demonstrate the pressure of air he devised the so-called Magdeburg hemispheres—two hollow copper hemispheres fitted together to form a globe c.14 in. (36 cm) in diameter from which the air could be pumped. A famous woodcut depicts the claim that it required two opposing eight-horse teams to pull the hemispheres apart. He invented (1660) a machine to generate electricity from the friction of the hand held against a rotating sulfur ball; he also predicted the periodicity of comets.

Guericke, Otto Von

 

Born Nov. 20, 1602, in Magdeburg; died May 11, 1686, in Hamburg. German physicist. Mayor of Magdeburg from 1646.

In trying to prove the existence of the vacuum, Guericke invented the air pump in 1650. In a series of experiments he proved the existence of air pressure (the experiment with the “Magdeburg hemispheres”), determined the elasticity of air, its ponderability, its ability to support combustion and to conduct sound, and the presence in it of water vapor. Guericke created one of the first electrical machines, a rotating sulfur sphere polished by hand, and discovered the phenomenon of electrical repulsion as well as electrical luminescence. In 1660 he was the first to build a water barometer and use it to predict the weather.

WORKS

Experimenta nova (ut vocantur) Magdeburgica de vacuo spatio. Amsterdam, 1672.

REFERENCES

Lebedev, V. I. Istoricheskie opyty po fizike. Moscow-Leningrad, 1937. (Contains translations of excerpts from Guericke’s works.)
Hoppe, E. Otto von Guericke. Berlin, 1927.
Mentioned in ?
References in periodicals archive ?
Most people prefer to hire people from a trusted contact," says Guericke.
Guericke also showed that candles could not burn in a vacuum and that animals could not live.
1715), knew of the power of the vacuum as demonstrated by Guericke (see 1645).
Air pumps such as those devised by Guericke and Hooke (see 1645 and 1657) did not produce very good vacuums.
LinkedIn Co-Founder Konstantin Guericke Joins as CEO
Guericke, president and CEO, Essex Property Trust, Inc.
They were called Magdeburg hemispheres because Guericke was mayor of Magdeburg.
Chair of Medical Psychology, Otto von Guericke University of Magdeburg in Magdeburg, Germany.
Confirmed moderators and panelists include: Walt Mossberg, Personal Technology Columnist, Wall Street Journal; Don MacDonald, VP Digital Home, Intel; Konstantin Guericke, Co-Founder & VP Marketing, LinkedIn; Yogesh Gupta, CTO, Computer Associates; and Ron Sege, CEO & President, Tropos Networks.
LinkedIn's Vice President for Marketing and a co-founder of the company, Konstantin Guericke, will be on hand to teach a session on "How to Make the Most of Social Networking Tools.