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Signature	Maker	Instruments	Comments	Location	References
GUERICKE, OTTO VON	Germany, 1602-86, PHIM	Magdeburg Hemispheres, 1657 = X; Friction Electrical Machine, 1660 = X.	Bürgermeister of Magdeburg; physicist, and amateur instrument maker; invented the air pump; made a water barometer, c.1654.	Magdeburg.	Daumas 1; DSB; G.L'E. Turner 24; Middleton 1.
GUERICKE, OTTO VON	Germany, 1602-86, PHIM	Magdeburg Hemispheres, 1657 = X; Friction Electrical Machine, 1660 = X.	Bürgermeister of Magdeburg; physicist, and amateur instrument maker; invented the air pump; made a water barometer, c.1654.	Magdeburg.	Daumas 1; DSB; G.L'E. Turner 24; Middleton 1.

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