676 THE PLEISTOCENE PERIOD 



stone implements. On the whole, present evidence seems to justify 

 the conclusion of most European archaeological geologists that man 

 was present in southern and central Europe during the later part of 

 the glacial period, and perhaps even early in the period. A recent 

 discovery in Switzerland would seem to place the beginning as far 

 back as the interglacial 1 epoch which may correspond with the North 

 American Yarmouth (p. 634). 



A few references relative to the antiquity of man: Chamberlin, T. C., Jour. Geol., 

 Vol. X; Geikie, James, The Great Ice Age, pp. 616-690; and Prehistoric Europe, 

 pp. 568 et seq.; Gilbert, G. K., Sci. Am. Supp., Vol. XXIII, 1887; Lyell, Sir Charles, 

 Antiquity of Man; McGee, W. J., Am. Geol., Vol. XXII, pp. 96-126; Sci., new ser., 

 Vol. IX, pp. 104-105; Upham, Warren, Science, Vol. XVI, pp. 355-6; Am. Geol., 

 Vols. XXX and XXXI; Whitney, J. D., Am. Jour. Sci., 2d ser., Vol. 43, pp. 265- 

 267, 1867; The Auriferous Gravels of the Sierra Nevada of California, Cambridge, 

 1879. 



1 Science, Vol. XXIX, 1909, p. 359. 



