Aquinas on Matter and Form and the Elements

<p>Joseph Bobik offers a translation of Aquinas's <i>De Principiis Naturae</i> (circa 1252) and <i>De Mixtione Elementorum</i> (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. <i>The Principles of Nature</i> introduces the reader to the basic Aristotelian principles such as matter and form the four causes so fundamental to Aquinas's philosophy. <i>On Mixture of the Elements</i> examines the question of how the four elements (earth air fire and water) remain within the physical things composed from them.</p>