"Abbot Neckam, the Augustinian (1157-1217), distinguished between the properties of the two ends of the lodestone, and gives in his De Utensilibus, what is perhaps the earliest reference to the mariner's compass that we have. Albertus Magnus, the Dominican (1193-1280), in his treatise De Mineralibus, enumerates different kinds of natural magnets and states some of the properties commonly attributed to them; the minstrel, Guyot de Provins, in a famous satirical poem, written about 1208, refers to the directive quality of the lodestone and its use in navigation, as do also Cardinal de Vitry in his Historia Orientialis (1215-1220), Brunetto Latini, poet, orator and philosopher (the teacher of Dante), in his Tresor des Sciences, a veritable library, written in Paris in 1260; Raymond Lully, the enlightened Doctor, in his treatise, De Contemplatione, begun in 1272, and Guido Guinicelli, the poet-priest of Bologna, who died in 1276." [Footnote 4] [Footnote 4: The letter of Petrus Peregrinus on the Magnet, A. D. 1269, translated by Bro. Arnold, M. Sc., with an Introductory Note by Bro. Potamian, N. Y., 1904.] {38} The metaphysics of the medieval universities have come in for quite as much animadversion, not to say ridicule, as the dialectics. None of its departments is spared in the condemnation, though most fun is made of the gropings of the medieval mind after truth in the physical sciences. The cosmology, the science of matter as it appealed to the medieval mind, is usually considered to have been so entirely speculative as to deserve no further attention. We have presumably, learned so much by experimental demonstration and original observation in the physical sciences, that any thinking of the medieval mind along these lines may, in the opinion of those who know nothing of what they speak, be set aside as preposterous, or at best nugatory. It will surely be a source of surprise, then, to find that in the consideration of the composition of matter and of the problem of the forces connected with it, the minds of the medieval schoolmen were occupied with just the same questions that have been most interesting to the Nineteenth Century and that curiously enough the conclusions they reached, though by very different methods of investigation, were almost exactly the same as those to which modern physical scientists have attained by their refined methods of investigation.