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Signature	Maker	Instruments	Comments	Location	References
SPENCER, CHARLES A.	USA, 1813-81, MIM OIM PHIM	Telescope = Hamilton College, Clinton, N.Y. (1858); Microscopes = USNM, St. Barnard College, Alabama; Microscope Objective = USNM.	made the first American microscopes; partner with A.K. Eaton, c.1854 for a few years; had Robert B. Tolles as apprentice and collaborator, 1843-58; later in business with his sons until 1873; after his shop burned he moved to Geneva, N.Y. (1877-80).	Canastota (1813-75); Geneva (1877-80); both in N.Y.	USNM; Ashbrook 2; Moskowitz 103.
SPENCER, CHARLES A.	USA, 1813-81, MIM OIM PHIM	Telescope = Hamilton College, Clinton, N.Y. (1858); Microscopes = USNM, St. Barnard College, Alabama; Microscope Objective = USNM.	made the first American microscopes; partner with A.K. Eaton, c.1854 for a few years; had Robert B. Tolles as apprentice and collaborator, 1843-58; later in business with his sons until 1873; after his shop burned he moved to Geneva, N.Y. (1877-80).	Canastota (1813-75); Geneva (1877-80); both in N.Y.	USNM; Ashbrook 2; Moskowitz 103.

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