Torricelli

Torricelli EVANGELISTA (1608-47), mathematician and natural philosopher was born at Piancaldoli and educated by the Jesuits. In 1641 be was appointed mathematician to the Grand Duke of Tuscany in succession to Galileo. From his discoveries in connection with the barometer that instrument has been called the Torricellian tube, and its vacuum the Torricellian vacuum. He a1so laid down the primary principles of hydromechanics, and made many discoveries in pure mathematics. His Trattato del Moto (Treatise on Motion) appeared about 1641.