Magister guillelmus ockam super librum predicabilium, predicamentorum et elenchorum [fenestratitel]

Manuscript 499 is a collection of four commentaries by William Ockham on parts of Aristotle's Organon. The first text (ff. 1r-17r) is Ockham's commentary on the Isagoge of Porphyrius (c. 234-305). The Isagoge is an introduction to Aristotle's Praedicamenta. Ockham's commentary on this latter text is followed immediately afterwards (ff. 17r-47r). The Praedicamenta or Categoriae discusses Aristotle'…