Roger Bacon's 'Opus Tertium' was a seminal text in the development of modern science. In this edition, Andrew Little includes a fragment of the text that has never before been printed, shedding new light on this important figure from the 13th century. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

An Irish quarterly review.

Christian-Muslim Relations, a Bibliographical History 4 (CMR 4) is a history of all the known works on Christian-Muslim relations in the period 1200-1350. It comprises introductory essays and detailed entries containing descriptions, assessments and compehensive bibliographical details of individual works.

During the later Middle Ages (twelfth to fifteenth centuries), the study of chronology, astronomy, and scriptural exegesis among Christian scholars gave rise to Latin treatises that dealt specifically with the Jewish calendar and its adaptation to Christian purposes. In Medieval Latin Christian Texts on the Jewish Calendar C. Philipp E. Nothaft offers the first assessment of this phenomenon in the form of critical editions, English translations, and in-depth studies of five key texts, which together shed fascinating new light on the avenues of intellectual exchange between medieval Jews and Christians.