Porphyry's Commentary on Ptolemy's Harmonics

Porphyry''s Commentary, the only surviving ancient commentary on a technical text, is not merely a study of Ptolemy''s Harmonics. It includes virtually free-standing philosophical essays on epistemology, metaphysics, scientific methodology, aspects of the Aristotelian categories and the relations between Aristotle''s views and Plato''s, and a host of briefer comments on other matters of wide philo...