BOOK REVIEWS 939 the invention of the microscope. And in the " Brief Catalogue of Authentic Works" at the end Weisheipl frequently makes the notation "No English translation" when in fact such translations do exist: for example, the Sententia de caelo et mundo, Sententia super libros de generatione et corruptione , and Sententia super Meteora have all been translated into English by R. F. Larcher and P. H. Conway, Columbus: College of St. Mary of the Springs, 1963-1964; the polemical treatise De aeternitate mundi contra murmurantes has been done by Cyril Volaert et al., Milwaukee: Marquette University Press, 1964; and the De mixtione elementorum, by V. R. Larkin in Isis, 51 (1960), pp. 67-7~. Yet these are but minor defects, hardly worthy of mention, that in no way detract from what is obviously the best biography of Aquinas now available, in English or in any language. The Catholic University of America Washington, D. C. WILLIAM A. WALLACE, O.P. Pia IX e La Rinascita del Tomismo. By ANTONIO ProLANTI. Citta del Vaticano: Libreria Editrice Vaticana, 1974. Pp. 113. The sixth centenary of the death of St. Thomas (1874) was hailed by the then Pontiff, Pius IX, as paralleling the significant celebration of a few years earlier (1867) of the 18th centenary of the deaths of Saints Peter and Paul: Hos inter laetos eventus sicut iam anno millesimo octingentesimo sexagesimo septimo celebravimus decimi octavi saecularis anni, quo Principes Apostolorum proprii sanguinis testimonio traditam confirmavit Evangelii doctrinam, sic celebraturi nunc sumus sextum saecularem annum depositionis Angelici Doctoris, Sancti Thomas Aquinatis, a Divina Providentia largiti ad eamdem doctrinam miro modo illustrandum.... These words of Pope Mastai express the genuine high value in which throughout his life he held the Angelic Doctor and for the rebirth of whose teaching he labored unceasingly. For this reason it should be noted that the later encyclical Aeterni Patris of Leo XIII, together with his proclamation of St. Thomas as Patron of Catholic Schools, were the fruits of the long period of promotion and encouragement on the part of Pius IX to reawaken in the Church and in the world an appreciation of St. Thomas and his teaching. The author of this brief account of the rather forgotten relationship of Pio Nono to the rebirth of Thomism is Postulator of the Cause of canonization of Pius IX, Secretary of the Pontifical Roman Theological Academy, Vice President of the Pontifical Acardemy of St. Thomas Aquinas, and, 940 BOOK REVIEWS among other achievements of publication, founder and director of the Biblioteca per la Storia del Tomismo, of which this monograph is number 8. His study is based on hitherto unknown or forgotten or undervalued and thus not previously considered testimonies. It is divided into nine chapters. Chapter I introduces us to the thomistic formation of Giovanni Maria Mastai Ferretti. His early acquaintance with St. Thomas was augmented and deepened in his further studies at the Collegio Romano and the Accademia Ecclesiastica where he had as professor the convinced Thomist Canon Giuseppe M. Graziani. The latter's influence on the Thomistio:: orientation of Mastai as theological student and as pontiff was immense. Chapter II surveys the magisterial documents of the thirty-two year pontificate. The first, the encyclical Qui Pluribus (1846) , was the charter of the pontificate, the leitmotiv of the papal teaching: the concord and mutual assistance of reason and faith. By means of the many documents of Pius IX the teaching of St. Thomas found its way into the Constitutions of Vatican I. Pius IX (Ch. III) defended the value of the scholastic and thomistic methods (cf. Denz.-Schon. fl814, fl880, fl876-2880, fl918). Monsignor Piolanti (Ch. IV) singles out the Dominican Order as one of the recipients of the papal encouragement in the revival of Thomism and the Jesuit Order with its role in the Civilta Cattolica. Chapter V describes the efforts of the pope to protect, develop, and increase Thomistic centers both in Rome and throughout Italy, such as the schools of Perugia under Cardinal Gioacchino Pecci (Leo XIII) and Naples under Cardinal Sisto Riario Sforza. His interest naturally extended to the doctrinal formation of the clergy. Chapter VI relates the pontiff's promotion of the sixth...