## quadratures

Noun

- plural form of
*quadrature*

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- To these curves, which were also applied to effect some
**quadratures**, Evangelista Torricelli gave the name of "Robervallian lines." - In 1649 he accompanied the mission of Henry, count of Nassau, to Denmark, and in 1651 entered the lists of science as an assailant of the unsound system of
**quadratures**adopted by Gregory of St Vincent. - It has not indeed proved practically available; but his system of calculating cometary perturbations by means of "mechanical
**quadratures**" has formed the startingpoint of all subsequent researches on the subject. - Of less interest nowadays are Robins's more purely mathematical writings, such as his Discourse concerning the Nature and Certainty of Sir Isaac Newton's Methods of Fluxions and of Prime and Ultimate Ratios (1735), "A Demonstration of the Eleventh Proposition of Sir Isaac Newton's Treatise of
**Quadratures**" (Phil. - The only geometry known to the Egyptian priests was that of surfaces, together with a sketch of that of solids, a geometry consisting of some simple
**quadratures**and elementary cubatures, which they had obtained empirically.

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