[178] Wappäus, loc. cit. vol. i. p. 242. Bertillon, ‘Natalité (démographie),’ in ‘Dictionnaire encyclopédique des sciences médicales,’ ser. ii. vol. xi. p. 479.
[179] Beukemann, loc. cit. p. 59.
[180] Hill, in ‘Nature,’ vol. xxxviii. p. 250.
[181] Professor Nicholson says (‘Sexual Selection in Man,’ p. 9) that Darwinism fails to assign any adequate cause for this.
[182] Waitz, ‘Introduction to Anthropology,’ p. 113.
[183] Oldfield, in ‘Trans. Ethn. Soc.,’ N. S. vol. iii. pp. 269, et seq.
[184] Darwin, ‘The Variation of Animals and Plants under Domestication,’ vol. ii. p. 255.
[185] Wappäus, loc. cit. vol. i. p. 247.
[186] Ibid., vol. i. p. 246. Quetelet, loc. cit. p. 20. Bertillon, in ‘Dictionnaire encyclopédique des sciences médicales,’ ser. ii. vol. xi. p. 480.
[187] Wappäus, vol. i. p. 343.