"Yet there has always in generous souls who have some tincture of philosophy, subsisted a curious kind of sympathy and yearning over the work of these generations of mainly disinterested scholars, who, whatever they were, were thorough, and whatever they could not do, could think. _And there, have even, in these latter days, been some graceless ones who have asked whether the Science of the nineteenth century, after an equal interval, will be of any more positive value--whether it will not have even less comparative interest than that which appertains to the Scholasticism of the Thirteenth."_ In the light of this it has seemed well to try to show in terms of present-day science some of the important reflections with regard to such problems of natural history, as magnetism, the composition of matter, and the relation of things physical to one another, which we now include under the name science, some of the thoughts that these scholars of the Thirteenth Century were thinking and were developing for the benefit of the {37} enthusiastic students who flocked to the universities. We will find in such a review though it must necessarily be brief many more anticipations of modern science than would be thought possible. To take the example for the moment of magnetism which is usually considered to be a subject entirely of modern attention, a good idea of the intense interest of this century in things scientific, can be obtained from the following short paragraph in which Brother Potamian in his sketch of Petrus Peregrinus, condenses the references to magnetic phenomena that are found in the literature of the time. Most of the writers he mentions were not scientists in the ordinary sense of the word but were literary men, and the fact that these references occur shows very clearly that there must have been wide-spread interest in such scientific phenomena, since they had attracted the attention of literary writers, who would not have spoken of them doubtless, but that they knew that in this they would be satisfying as well as exciting public interest.