{Introduction to the Categories of Aristotle { (Isagoge), Porphyry. (1) The "Old" Logic {Categories, and On Interpretation, { Aristotle. {Divisions, and Topics except Bk. IV, { Boethius. {Prior and Posterior Analytics, Aristotle. (2) The "New" Logic {Sophistical Refutations, " {Topics, " (3) Moral Philosophy: Ethics, 4 Bks., " {Physics, Aristotle. {On the Heavens and the Earth, " {Meteorics, " {On Animals, " {" the Soul, " (4) Natural Philosophy {" Generation, " {" Sense and Sensible Things, " {" Sleep and Waking, " {" Memory and Recollection, " {" Life and Death, " {" Plants, " (?) (5) Metaphysics: Metaphysics, " {On the Six Principles, Gilbert de la Porree {Barbarismus (Bk. 3, Larger Grammar), { Donatus. (6) Other Books {Grammar (Major and Minor), Priscian. {On Causes, Costa Ben Luca. {On the Differences of Spirit and Soul { (another translation of On Causes).[71] An interesting part of the Statute of 1254 relates to the length of time to be given to the various books, or groups of books, prescribed. The entire Old Logic is to be read in about six months (October 1-March 25); the New Logic and Priscian's Grammar in the same length of time; the Physics, the Metaphysics and On Animals, together, in somewhat more than eight months (October 1-June 25); the four books of the Ethics, alone, in six weeks; On Life and Death is to be completed in one week, and several of the other treatises in the same group are to be read in periods varying from two to five weeks. Knowledge of these facts renders the list as a whole considerably less imposing than it might otherwise appear. 2. Books required at Paris in 1366. In this and all the following examples the books are by Aristotle unless otherwise specified. For the A.B.: (1) Grammar: Doctrinale, Alexander da Villa Dei. (2) Logic: The Old and the New Logic, as above. (3) Natural Philosophy: On the Soul.