Fundamentals of Arithmetic; Fundamentals of Music

III. Definition and division of number, and definition of even and odd.
IIII. Definition of even and odd number according to Pythagoras.
5 V. Another division of even and odd according to the older method.
VI. Definition of even and odd by one another.
VII. On the principality of unity.
VIII. Division of even number.
VIIII. On the "equally even" number and its properties.
10 X. On the "equally odd" number and its properties.
XI. On the "unequally even" number and its properties, and concerning its relationship to the "equally even" and "equally odd."
XII. Exposition of a description pertaining to the nature of the "unequally even."
15 XIII. On the odd number and its division.
XIIII. On the prime and incomposite number.
XV. On the secondary and composite number.
XVI. On that which is secondary and composite in itself, but prime and incomposite in relation to another.
20 XVII. On the generation of the prime and incomposite, the secondary and composite, and that which is secondary and composite to itself but prime and incomposite to another.
XVIII. On the discovery of those numbers which are secondary and composite to themselves, but prime and incomposite when related to others.
25 XVIIII. Another partition of the even number according to perfect, imperfect, and super-perfect numbers.
XX. On the generation of the perfect number.
XXI. On quantity related to something.