Otto von Guericke, inventor of the Magdeburg hemispheres demo, was a German scientist and engineer in addition to mayor of Magdeburg. The Magdeburg hemispheres demo was part of a series of experiments ...

May 8, 1654.—One of the most striking demonstrations in physical science made during the seventeenth century was that of Otto von Guericke, who on May 8, 1654, before the assembled princes at ...