CASATI, PAUL, a learned Jesuit (1617-1707), born at Placentia. After having taught mathematics and divinity at Rome, he was sent into Sweden to Queen Christina, and prevailed on her to embrace the popish religion. He afterwards presided over the university of Parma. He wrote, 1. Vacuum proscriptum; 2. Terra machinis mota, Rome, 1668, 4to; 3. Mechanicorum libri octo; 4. De Igne Dissertationes, Parma, 1686 and 1695, 2 vols. 4to; 5. De Angelis Disputatio Theologica; 6. Hydrostatica Dissertationes; 7. Opticae Disputationes. The last mentioned treatise he wrote at the age of 88, and after he was blind.