[4] Balfour, Comparative Embryology, i. 2.
[5] Part of an address before the Brooklyn Ethical Association, May 31, 1891.
[6] See, for example, Principles of Psychology, second edition, 1870-72, vol. ii. pp. 145-162.
[7] See also Excursions of an Evolutionist, 1883, pp. 274-282.
[8] First Principles, second edition, 1867, p. 217.
[9] Id. p. 558.
[10] See, e. g., Principles of Psychology, second edition, vol. i. pp. 158-161, 616-627.
[11] Vol. i. p. 158. Cf. my Cosmic Philosophy, vol. ii. p. 444.
[12] "If thou wouldst press into the infinite, go but to all parts of the finite."
[13] An address before the Brooklyn Ethical Association, March 23, 1890.