Consists of an exposition and discussion of philosophy, mainly Aristotelian. Page 1 of the paginated section (f. 15r) begins with the following inscription: "Philosophia Peripatetica juxta mentem divi Thomae elucubrata rationibus inconcessis et clarissimis nec non invalidissimis Argumentis roborata." This appears to be intended as a heading for the entire work. The text is divided into part I (p. 1-339) and part II (p. 341-465). On pp. [2]-[7] of the second unpaginated section, after the end of the body of the text (ff. 241r-243r), there is a short index prepared by Jordan.
