[1578] v. Humboldt, ‘Political Essay,’ p. 141.
[1579] Cf. Lawrence, ‘Lectures on Physiology,’ &c., p. 474.
[1580] Godron, ‘De l’espèce et des races,’ vol. ii. p. 310.
[1581] Ibid., vol. ii. pp. 175, et seq.
[1582] Quetelet, loc. cit. pp. 59, et seq. Cf. Ranke, ‘Der Mensch,’ vol. ii. pp. 77-79, 116, et seq.
[1583] Waitz, ‘Introduction to Anthropology,’ p. 86.
[1584] Geoffroy Saint-Hilaire, ‘Histoire des anomalies,’ vol. i. pp. 158, 159, 182-185. Cf. Ranke, loc. cit. vol. ii. pp. 131-136.
[1585] Lawrence, loc. cit. p. 400.
[1586] Virchow, ‘Untersuchungen über die Entwickelung des Schädelgrundes,’ p. 121.
[1587] Spencer, ‘Essays,’ vol. ii. pp. 153, et seq.