[15] Lotze, Microcosmus, E. T., ii. p. 718.
[16] Lotze, Microcosmus, E. T., ii. p. 718.
[17] Mill, Inductive Logic, bk. iii. ch. vi.
[18] Mill, Inductive Logic, bk. iii. ch. vi.
[19] Claude Bernard, quoted in L'Année Sociologique, première année.
[20] Principles of Biology, v. § 30.
[21] Principles of Sociology, vol. i. part ii.
[22] Ibid., § 260.
[23] First Principles, § 127.
[24] Ibid., § 153.