[116] "The Principles of Psychology," by Herbert Spencer, third edition. New York: D. Appleton & Co., 1885.

[117] "Principles of Psychology," i, p. 162.

[118] "Principles of Psychology," ii, p. 503.

[119] "Principles of Psychology," ii, p. 503.

[120] Revised version.

[121] Darwin, "Descent of Man," Part I, chap. iv.

[122] "Descent of Man," Part I, chap. iv.

[123] Quoted in Darwin's "Descent of Man," p. 123.

[124] "Principles of Sociology," i, p. 433, § 202.

[125] Ibid., chap. xxv, p. 414 et seq.