Torricelli (Evangelista) Opera Geometrica[De sphæra et Solidis Sphæralibus; De Motu Gravium; De Dimensione Parabolæ], 3 parts in one, first edition, general half-title, part I title with imprint, section titles to parts II & III, dedication to Grand Duke Ferdinand II de' Medici, part III separately signed & paginated with separate dedication to Prince Leopold de' Medici, imprimatur leaf at end, numerous small woodcut diagrams, one full-page engraving, letterpress tables, occasional light spotting and browning, contemporary vellum with old ms. mathematical notations on covers, 4to, [Honeyman VII 2991; Norman II 760 (2086); PMM 145; Riccardi II 542], small 4to, Florence, Amadoro Massa and Lorenzo de Landis, 1644.

***The first edition of the only work published during Torricelli's lifetime. In the first half Torricelli elucidated and diffused the difficult geometry of Cavalieri, thereby garnering widespread recognition throughout Europe. Torricelli is perhaps most well-known for his discovery of the barometer and his work on hydrodynamics ('Torricelli's Theorem'), also examined in the present work; he succeeded Galileo as grand ducal mathematician and professor of mathematics in the Florentine Academy..