[40] W.Z.  Ripley, Races of Europe, pp. 79-86, 96, 100.  New York, 1899.

[41] T. Waitz, Anthropology, pp. 57-58.  Edited by J.F.  Collingwood.  London, 1863.

[42] Schoolcraft, Indian Tribes of the United States, Vol.  I, pp. 198-200, 219.  Philadelphia, 1853.

[43] Darwin, Descent of Man, p. 33.  New York, 1899.

[44] D. Livingstone, Missionary Travels, p. 266.  New York, 1858.

[45] Alaska, Eleventh Census Report, pp. 54, 56.  Washington, 1893, and Albert P. Niblack, The Coast Indians of Southern Alaska and Northern British Columbia, p. 237.  Washington, 1888.

[46] Fitz-Roy, Voyage of the Beagle, Vol.  II, pp. 130-132, 137, 138.  London, 1839.

[47] H. Bancroft, Native Races, Vol.  I, pp. 88-89.  San Francisco, 1886.

[48] S. Stanhope Smith, Essay on the Causes of the Variety of Complexion and Figure in the Human Species, pp. 103-110.  New Brunswick and New York, 1810.

[49] For full discussion see A.R.  Wallace’s article on acclimatization in Encyclopedia Britanica, and W.Z.  Ripley, Races of Europe.  Chap.  XXI.  New York, 1899.

[50] D.G.  Brinton, Races and Peoples, pp. 39-41.  Philadelphia, 1901.

[51] Darwin, Descent of Man, pp. 34-35.  New York, 1899.

[52] E.F.  Knight, Where Three Empires Meet, pp. 137-138.  London, 1897.

[53] W.Z.  Ripley, Races of Europe, pp. 58-71, Map.  New York, 1898.

[54] Ibid., p. 566.  D.G.  Brinton, Races and Peoples, pp. 29-30.  Philadelphia, 1901.

[55] D. Livingstone, Missionary Travels, p. 607.  New York, 1858.

[56] Williams and Calvert, Fiji and the Fijians, p. 83, New York, 1859.

[57] P. Ehrenreich, Die Urbewohner Brasiliens, p. 32.  Braunschweig, 1897.

[58] T. Waitz, Anthropology, pp. 46-49.  Edited by Collingwood, London, 1863.

[59] Philippine Census, Vol.  I, p. 552.  Washington, 1903.

[60] F. Ratzel, History of Mankind, Vol.  III, p. 106.  London, 1908.

[61] Major Charles E. Woodruff, The Effect of Tropical Light on the White Man, New York, 1905, is a suggestive but not convincing discussion of the theory.

[62] W.Z.  Ripley, Races of Europe, pp. 74-77.  New York, 1899.

[63] Quoted in G. Sergi, The Mediterranean Race, p. 73.  London and New York, 1901.

[64] Ibid., pp. 63-69, 74-75.

[65] T. Waitz, Anthropology, pp. 44-45.  Edited by J.F.  Collingwood, London, 1863.

[66] W.Z.  Ripley, Races of Europe, p. 76.  New York, 1899.

[67] For able discussion, see Topinard, Anthropology, pp. 385-392.  Tr. from French, London, 1894.

[68] J. Johnson, Jurisprudence of the Isle of Man, pp. 44, 71.  Edinburgh, 1811.

[69] Charles F. Hall, Arctic Researches and Life among the Eskimo, p. 571.  New York, 1866.  Franz Boas, The Central Eskimo, Sixth Annual Report of the Bureau of Ethnology, pp. 588-590.  Washington, 1888.