[65] "First Principles," Part I, Chap. V, § 31, p. 108.
[66] Part II, Book I, Chap. II.
[67] N. Y., 1889, pp. 62-63.
[68] Pp. 68-69.
[69] P. 70.
[70] Pp. 71 and 72.
[71] Chap. III, p. 75.
[72] "Seeing and Thinking," London, Macmillan & Co., 1879.
[73] Professor Clifford has used the word number in two senses, a quantitative and a qualitative. By number in the latter sense he means simply unlimited units.
[74] Ueberweg, Hist. of Philos., Vol. I, § 20. N. Y., 1877, pp. 57-58.