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Signature	Maker	Instruments	Comments	Location	References
ROBINSON, THOMAS CHARLES	England, 1792-1841, MIM NIM PHIM SIM	Mountain Barometer = X; Dip Circle = RGO; Balances = WHI, RSM, Cambridge University Mining Dept.; Theodolite, miniature = Yorkshire Museum, York; Universal Instrument, 1857 = BRO.	developed a type of beam balance; made rock crystal prisms; Henry Barrow bought the business in 1842 and continued it as Robinson and Barrow.	38 Devonshire Street, Portland Place, London.	Taylor 2(1687); Goodison 1; USNM; Bryden 8; G.L'E. Turner 24; Stock 1; Dewhirst; Darius 4.
ROBINSON, THOMAS CHARLES	England, 1792-1841, MIM NIM PHIM SIM	Mountain Barometer = X; Dip Circle = RGO; Balances = WHI, RSM, Cambridge University Mining Dept.; Theodolite, miniature = Yorkshire Museum, York; Universal Instrument, 1857 = BRO.	developed a type of beam balance; made rock crystal prisms; Henry Barrow bought the business in 1842 and continued it as Robinson and Barrow.	38 Devonshire Street, Portland Place, London.	Taylor 2(1687); Goodison 1; USNM; Bryden 8; G.L'E. Turner 24; Stock 1; Dewhirst; Darius 4.

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