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厄文‧托馬許藏書: 運算的歷史

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Jettons
A COLLECTION OF 3 WORKS, COMPRISING:
i. Barnard, Francis Pierrepont (1854-1931). The casting-counter and the counting board. A chapter in the history of numismatics and early arithmetic. Oxford: Clarendon Press, 1916, 4to, first edition, plates, original cloth gilt, preserved in folding cloth box, (bought from Spink, 1981), [T&W B94]
ii. Smith, David Eugene (1860-1944). Computing Jetons. New York: American Numismatic Society, 1921, 8vo, original paper covers, plates, preserved in cloth folding box, (bought from Spink, 1975), [T&W S131]
iii. Florange, Jules Michel Marie (1863-1937). Armorial du Jetonphile. Guide de l'amateur des jetons armories. Paris: J. Florange, 1902 & 1907, 4to, 2 volumes in 1, original wrappers bound in, modern quarter brown morocco, patterned boards, (bought from Jonathan Hill, 1989), [T&W F79]
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相關資料

Jettons are the counters that are used on the European table abacus. Barnard's work - which is still the standard reference work on Jettons - expanded interest in the use of these counters, used on counting boards as the principal mechanical aid to calculation in Europe in the Middle Ages. Smith's lecture approaches the subject from a mathematical perspective.

厄文‧托馬許藏書: 運算的歷史

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倫敦