[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.