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tôrəchelē; *It* tppēchellē

1608-47; It. physicist & mathematician: discovered principle of the barometer.

proper name

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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.

In particular, for a jet issuing into the atmosphere, where p=P, q 2 /2g = h - z, (9) or the velocity of the jet is due to the head k-z of the still free surface above the orifice; this is Torricelli's theorem (1643), the foundation of the science of hydrodynamics.

Incited by the discoveries of Galileo, Pascal and Torricelli, he attempted the, creation of a vacuum.