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Magdeburg hemispheres

Line breaks: Mag¦de|burg hemi|spheres

Definition of Magdeburg hemispheres in English:

plural noun

A pair of copper or brass hemispheres joined to form a hollow globe from which the air can be extracted to demonstrate the pressure of the atmosphere, which then prevents them from being pulled apart.
Example sentences
  • Magdeburg hemispheres from the latter part of the nineteenth century and the early part of the twentieth century were rarely marked with the name of the maker.
  • n this demonstration 16 horses could not pull apart the two halves of an evacuated sphere, which became known as Magdeburg hemispheres.

Origin

early 19th century: named after the city of Magdeburg, home of the inventor, Otto von Guericke (1602–86).

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