Abstract
A concise study in Thomistic theory of knowledge and philosophy of science, aiming primarily to mediate the controversy, within the Thomist camp, between Maritain and his opponents over "the Science-Philosophy problem": is science a field of knowledge distinct from philosophy, and if so wherein? Against both Maritain and his opponents the author argues for a more basic distinction between metaphysics and philosophy of nature; but in favor of Maritain he supports the separation of certain empiriological sciences, along with mathematics, from philosophy of nature. -- L. K. B.