Evangeliste, an illustrious Italian mathematician and philosopher, born at Faenza in 1608. He was trained in Latin literature by his uncle a monk; and after cultivating mathematical knowledge for some time without a master, he studied it under Father Benedict Cafelli, professor of mathematics at Rome. Having read Galileo's dialogues, he composed a treatise on motion, on his principles, which brought him acquainted with Galileo, who took him home as an affiant: but Galileo died in three months after. He became professor of mathematics at Florence, and greatly improved the art of making telescopes and microscopes: but he is best known for finding out a method of ascertaining the weight of the atmosphere by quicksilver; the barometer being called, from him, the Torricellian tube. He published Opera Geometrica, 4to, 1644; and died in 1647.