Rare Books

The art of numbring [sic] by speaking-rods: vulgarly termed Nepeirs bones. : By which the most difficult parts of arithmetick, as multiplication, division, and extracting of roots both square and cube, are performed with incredible celerity and exactness (without any charge to the memory) by addition and subtraction only

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Type: Rare Books(Opens in new tab)
Publication date: 1685.
Call number: 430999
Creator: Leybourn, William (1626-1716)(Opens in new tab)
Dimensions: 12mo
Associated people: Braddyll, Thomas,; Sawbridge, H.
Find out more: View in the Library catalog(Opens in new tab)

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Arithmetick: vulgar, decimal, instrumental, algebraical, : in four parts. I. Vulgar arithmetick, in whole numbers and fractions, in a plain and easie method. II. Decimal arithmetick, the ground and reason thereof, and its use illustrated by divers examples. III. Instrumental arithmetick, performing, by decimal scales, all kind of reductions ... Also new scales, whereby the square and cube roots may be extracted by inspection only: both of them new artifices; ... with the description of Nepair's Bones ... and the use of them in multiplication, division, and extracting of roots. IV. Algebraical arithmetick, containing an abridgment of the precepts of that art, and its use, illustrated by questions of divers kinds. Whereunto is added, the construction and use of several tables of interest and annuities, weights and measures, both of our own and other countries. The fourth edition, corrected and enlarged
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