[14] Topinard, Éléments d'Anthropologie, 1885, p. 612.
[15] Ibid., p. 568.
[16] La Forma del Cervello umano e le variazioni correlative del Cranio, Siena, 1886.
[17] For chemical formulæ of some of the compounds, see Ladd, Outlines of Physiological Psychology, p. 13.
[18] For the opinions of investigators, as Mosso, Lombard, Maggiora, Kraeplin, and others, see Pedagogical Seminary, vol. ii, No. 1, pp. 13-17; Scripture, The New Psychology, chapter xvi; and Educational Review, vol. xv, pp. 246 et seq.
[19] Microcosmus, p. 162.
[20] Descent of Man, p. 66.
[21] Mental Evolution in Man, pp. 218 et seq.
[22] Darwinism, p. 469.
[23] Destiny of Man in the Light of his Origin.