Magdeburg Hemisphere, laboratory of the Abbé Nollet, Musée des Arts et Métiers

DSCN2016Two copper bowls would be joined to form a hollow sphere. After the air was removed from this sphere, two teams of horses were hitched to pull on the two bowls in order to separate them – which they would fail to do. When air was again allowed into the sphere, the bowls would come apart by themselves.

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