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The art of numbring by speaking rods, vulgarly termed Nepeirs bones by which the most difficult parts of arithmetick, as multiplication, division, and extracting roots both square and cube, are performed with incredible celerity and exactness (without any charge to the memory) by addition and subtraction only.
Leybourn, William, 1626-1716. EEBO The Huntington Library records - unstructured. [7], 86, [2] p. London: Printed by T.B. for H. Sawbridge .., 1685.
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