CASATI, PAUL, a learned Jesuit, born at Placentia in 1617, entered early among the Jesuits; and after having taught mathematics and divinity at Rome, was sent into Sweden to Queen Christina, whom he prevailed on to embrace the Popish religion. He wrote, 1. Vacuum proscriptum. 2. Terra machinis nota. 3. Mechanicorum, libri octo. 4. De Igne Dissertationes, which is much esteemed. 5. De Angelis Disputatio Theolog. 6. Hydrostaticæ Dissertationes. 7. Opticæ Dissertationes. It is remarkable that he wrote this treatise on optics at 88 years of age, and after he was blind. He also wrote several books in Italian.