THOMAS, CHARLES XAVIER, CHEVALIER |
France, 1785-1870, MIM |
Arithmometers = KEN, Christie 12/21/71, Phillips 11/16/88 (o. 1778). |
Charles Xavier Thomas de Colmar; invented the Arithmometer, a multiplication machine, c.1820; showed in the Great Exhibition of 1851 in London. |
Colmar, Alsace; 13 Rue du Helder, Paris. |
G.L'E. Turner 24; RSW. |
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