[31]See Bk. IV., Chapters XIV. and XV.
[32] See Bk. I., Ch. III.
[33] See Bk. I., Ch. XX.
[34] See Bk. I., Ch. XXV.
[35] See Bk. I., Chap. III.
[36] See Book V., Ch. XI.
[37] See Book V., Chapters XIV., XV., and XVI.
[38] See Chap. V.
[39] See Bk. III., Chaps. XIX., XXI., XXIV., XXV., XXVI., XXVII. and XXVIII.
[40] I am speaking of the difference between positive quantities; for with regard to other quantities we may express an infinite difference algebraically. Let the two quantities be (∞ - a) and (-a). The difference between them will be expressed in this equation, D=(∞ - a) - (-a) = ∞ - a + a = ∞.