- The windows in the outer walls are filled with pierced stone screens of
**geometrical**design. - LORENZO MASCHERONI (1750-1800), Italian geometer, was professor of mathematics at the university of Pavia, and published a variety of mathematical works, the best known of which is his Geometria del compasso (Pavia, 1797), a collection of
**geometrical**constructions in which the use of the circle alone is postulated. - The main work of Descartes, so far as algebra was concerned, was the establishment of a relation between arithmetical and
**geometrical**measurement. - In mathematics, he was the first to draw up a methodical treatment of mechanics with the aid of geometry; he first distinguished harmonic progression from arithmetical and
**geometrical**progressions. - By
**geometrical**consideration it can be shown that the angle subtended by p, as seen from F, must be inversely as the square of its distance r.

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