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Signature	Maker	Instruments	Comments	Location	References
SCHALL, JOHANN ADAM, VON BELL	Germany; China, 1591-1666, MIM	Sundial, ivory = Stonyhurst College, Lancaster, England.	Jesuit; chief astronomer and President of the Mathematical Tribunal, Beijing.	Cologne; Beijing (1618-66).	H.J. Jones; D. Rowe 1.
SCHALL, JOHANN ADAM, VON BELL	Germany; China, 1591-1666, MIM	Sundial, ivory = Stonyhurst College, Lancaster, England.	Jesuit; chief astronomer and President of the Mathematical Tribunal, Beijing.	Cologne; Beijing (1618-66).	H.J. Jones; D. Rowe 1.

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