[14] The cephalic index by which we measure the head-form is merely the breadth of the head in percentage of its length from front to back. The index rises as the head becomes relatively more broad.
[15] Verneau, 1881 a, p. 500.
[16] Pruner Bey, 65 b; Gillebert d'Hercourt, 1868, p. 9; and especially Collignon, 1887 a, pp. 326-339; Bertholon, 1892, p. 41; also Collignon, 1896 b.
[17] Eliséev, 1883.
[18] Bertholon, 1892, p. 43; Sergi, 1897 a, chapter i, and even more recently Fouquet, 1896 and 1897, on the basis of De Morgan's discoveries.
[19] Compare Brinton, 1890 a, p. 132, and 1890 b, for interesting linguistic data on the Semites.
[20] 1877, pp. 88-90; 1885, p. 84.
[21] Centralblatt für Anthropologie, vol. iii, p. 66.
[22] Virchow, 1886 b, p. 364; Schimmer, 1884, p. xxiii.
[23] Weissenberg, 1895, p. 567, finds brunettes twice as frequent among the south Russian Jewesses as among the men.