The New Stone Age in Northern Europe

by John M. Tyler

[2.] Wilder, H. H. History of the Human Body. New York, 1909.

[3.] Cope, E. D. Primary Factors of Evolution. Chicago, 1895, p. 150.

[5.] Osborn, H. F. Age of Mammals. New York, 1910.

[6.] Loomis, F. B. “Adaptation of Primates,” Amer. Nat., XLV, 1911, 479.

[7.] Gregory, W. K. “Studies in the Evolution of Primates,” Bull. Amer. Mus. Nat. Hist., XXV, 1916, Art. XIX, 239.

[8.] Barrell, J. “Probable Relations of Climatic Changes to Origin of Tertiary Ape-Man,” Sci. Mo., N. S., IV, 1917, 16.

[9.] Matthew, W. D. “Climate and Evolution,” Ann. N. Y. Acad. Sci., XXIV, 1915, 170.

[10.] Pilgrim, G. E. “New Siwalik Primates,” Records of Geol. Survey of India, XLIII, 1913, Part IV, 264.

[11.] Chamberlain, T. C., and Salisbury, R. D. Geology. New York, 1904, Vol. III, 534.