I. Islam.- Recommencements de l'algebre aux XIe et XIIe siecles.- Discussion.- The Influence of Stoic Logic on Al-Ja????'s Legal Theory.- Discussion.- The Beginnings of Islamic Theology.- Discussion.- Science, Philosophy, and Religion in Alfarabi's Enumeration of the Sciences.- Comments.- II. The Twelfth and Thirteenth Centuries in the Latin West.- The Organization of Sciences and the Relations of Cultures in the Twelfth and Thirteenth Centuries.- Discussion.- La nouvelle idee de nature et de savoir scientifique au XIIe siecle.- Discussion.- Experience, Praxis, Work, and Planning in Bernard of Clairvaux: Observations on the Sermones in Cantica.- Discussion.- III. The Fourteenth, Fifteenth, and Sixteenth Centuries in the Latin West.- From Social into Intellectual Factors: An Aspect of the Unitary Character of Late Medieval Learning.- Discussion.- Autonomous and Handmaiden Science: St. Thomas Aquinas and William of Ockham on the Physics of the Eucharist.- Discussion.- Reformation and Revolution: Copernicus's Discovery in an Era of Change.- Discussion.- Reflexions sur les rapports entre theorie et pratique au moyen age.- Discussion.- Philosophy and Science in Sixteenth-Century Universities: Some Preliminary Comments.- Discussion.