Jews at that time were devoted adherents of Averroes. When the friars began to take their place in the work of the universities we note two striking changes: (i.) the friars cut loose entirely from the timid policy of conservatism and begin to make free use of all the works of Aristotle and of the Arabic commentators, and also make efforts to procure newer and more correct translations of the Aristotelian text from the original Greek; under this leadership the universities gradually became more modern and enterprising in their scientific work, though not without evidence of strong opposition in certain quarters. (ii.) As a natural corollary a more correct appreciation was made of the tendencies of the several commentators. The leader in these newer studies was the Franciscan Alexander Hales (d. 1245), who was the first to make free use of Aristotle outside the logical Organon. His _Summa_, which was left unfinished and continued by the Franciscan William of Melitona, was based on the _Sentences_ of Peter Lombard, and serves as a commentary to it. Peter Lombard, however, had not quoted Aristotle at all, whilst Alexander uses the metaphysical and scientific works as well as the logic. From this time forth the Franciscans begin to use the Arabic commentators. The more accurate study of Aristotle in mediæval scholasticism begins with Albertus Magnus (1206-1280), the Dominican friar who first really perceived the importance of careful and critical versions of the text, and thus introduced a strictly scientific standard of method. He studied at Padua, a daughter university of Bologna, but became a Dominican in 1223. His methods were followed and developed by his pupil, St. Thomas Aquinas (d. 1274), who arranged his work on the lines already indicated in Albertus’ commentary on Aristotle’s _Politics_, lines which became the regulation method in Latin scholastic writers, and he was at pains to get new translations made directly from the Greek, which was now freely accessible; a new translation direct from the Greek was made by William de Moerbeka at the request of St. Thomas. But there is a significant change from the time when Albertus delivered his lectures: in the work of Albertus the commentator chiefly used was Ibn Sina, but in that of St. Thomas there is a free use of Averroes (Ibn Rushd), although St. Thomas shows that he is perfectly well aware of the peculiar doctrines held by this latter philosopher, and guards himself carefully from them.