28 : 19. Davenport, passim; Ripley, passim; and any general book on anthropology.
28 : 24–29: 17. Ripley, pp. 80, 81, 84, 108–109, 131, 132, 252, 271, 307. Also see Davenport and Conklin, passim, and the notes to p. 18 of this book.
30 : 18–31: 8. For a very interesting discussion of this question see Conklin, 2, vol. IX, no. 6, pp. 492–6; Deniker, 2, p. 18; Haddon, 2, chap. IV; and Louis R. Sullivan, The Growth of the Nasal Bridge in Children, are other authorities. Some special studies of the nose have been made by Majer and Koperniki, Weisbach, and Olechnowicz, for which see Ripley, pp. 39 4–395. Jacobs, pp. 23–62, is particularly good on nostrility.
31 : 9. Deniker, 2, p. 83.
31 : 13. On the shape of the foot as a racial character see Rudolf Martin, Lehrbuch der Anthropologie, pp. 317 seq.; and Beddoe, 4, pp. 245 seq.; W. K. Gregory, 2, p. 14, and John C. Merriam, vol. IX, pp. 202 seq., have both discussed the evolution of the foot and the hand, and the anatomical differences which distinguish those of man from those of the apes.
31 : 16. P. Topinard, 2, chap. X, and Rudolf Martin, pp. 367 seq.
32 : 4. Beard lighter than head hair. Darwin, Descent of Man, p. 850.
32 : 8. The red-haired branch of the Nordics. On red hair see Beddoe, 4, pp. 3, 151–156; Fleure and James, Anthropological Types in Wales, pp. 118 seq.; Ripley, pp. 205–207, based on Arbo; T. Rice Holmes, Cæsar’s Conquest of Gaul, p. 337; and F. G. Parsons, Anthropological Observations on German Prisoners of War, pp. 32 seq.
32 : 21. See notes to p. 66.
33 : 7. Haddon, 1, p. 9 seq.; Deniker, Races of Man; Ratzel, History of Mankind; etc.