Joseph Bobik offers a translation of Aquinas’s De Principiis Naturae (circa 1252) and De Mixtione Elementorum (1273) accompanied by a continuous commentary, followed by two essays: “Elements in the Composition of Physical Substances” and “The Elements in Aquinas and the Elements Today.” The Principles of Nature introduces the reader to the basic Aristotelian principles such as matter and form, the four causes so fundamental to Aquinas’s philosophy. On Mixture of the Elements examines the question of how the four elements (earth, air, fire, and water) remain within the physical things composed from them.

In Aquinas on Being and Essence: A Translation and Interpretation, Joseph Bobik interprets the doctrines put forth by St. Thomas Aquinas in his treatise On Being and Essence. He foregrounds the meaning of the important distinction between first and second intentions, the differing uses of the term “matter,” and the Thomistic conception of metaphysics.

“The pedagogical aim which we have before us in this little book forces us to limit ourselves to the consideration of the great and central doctrines of Thomism, and to leave aside the innumerable applications of those doctrines which may be found scattered up and down the extensive works of Thomas Aquinas”

"In the brief span of some 140 pages Pere Gardeil succeeds remarkably well in the simple presentation of the Aristotelian principles of mobile being, quantity, motion, causation, place, time, inanity, the first mover, and astronomical theory. A second section (of some forty-five pages) selects five capital texts from the classic commentary of St. Thomas upon Aristotle's Physics and the full text of his model synopsis of Aristotelian cosmology in the early Paris opuscule, De Principiis Naturae. The translation of the original French work of 1953 has been accomplished with sober clarity and served editorially with a useful index and notes. Its frank, working language should attract both philosophical novice and pragmatic scientist alike and effect their working contact with a classic vision of the universe."--Philosophical Studies

Offers more the reader more aids -- including notes and a commentary -- than does any other translation.