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Signature	Maker	Instruments	Comments	Location	References
LANGLOIS, CHARLES FRANCIS	France, c.1700, MIM	Butterfield-type Sundial = DRE; Pantograph = DRE; Graphometer = DRE.		Paris.	Grötzsch 2.
LANGLOIS, CHARLES FRANCIS	France, c.1700, MIM	Butterfield-type Sundial = DRE; Pantograph = DRE; Graphometer = DRE.		Paris.	Grötzsch 2.

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