To these curves, which were also applied to effect some quadratures, Evangelista Torricelli gave the name of "Robervallian lines."
Benedetto Castelli (1577-1644), and Evangelista Torricelli (1608-1647), two of the disciples of Galileo, applied the discoveries of their master to the science of hydrodynamics.
The theorem of Torricelli was employed by many succeeding writers, but particularly by Edme Mariotte (1620-1684), whose Traite du mouvement des eaux, published after his death in the year 1686, is founded on a great variety of well-conducted experiments on the motion of fluids, performed at Versailles and Chantilly.
Incited by the discoveries of Galileo, Pascal and Torricelli, he attempted the, creation of a vacuum.
The cycloid was a famous curve in those days; it had been discussed by Galileo, Descartes, Fermat, Roberval and Torricelli, who had in turn exhausted their skill upon it.
Evangelista Torricelli, in the first regular dissertation on the cycloid (De dimensione cycloidis, an appendix to his De dimensione parabolae, 1644), states that his friend and tutor Galileo discovered the curve about 1599.
Torricelli, by employing the "method of indivisibles," deduced that the area was exactly three times that of the generating circle; this result had been previously established in 1640 in France by G.
The trochoids were studied by Torricelli and F.
EVANGELISTA TORRICELLI (1608-1647), Italian physicist and mathematician, was born at Faenza on the 15th of October 1608.
Its communication by Castelli to Galileo in 1641, with a proposal that Torricelli should reside with him, led to Torricelli repairing to Florence, where he met Galileo, and acted as his amanuensis during the three remaining months of his life.
After Galileo's death Torricelli was nominated grand-ducal mathematician and professor of mathematics in the Florentine academy.
345; Ghinassi, Lettere fin qui inedite di Evangelista Torricelli (Faenza, 1864); Tiraboschi, Storia della lett.
He continued his scientific correspondence with unbroken interest and undiminished logical acumen.