RELICS OF MAN IX THE GLACIAL PERIOD. 253 



explored by Miss Franc E. Babbitt, who succeeded in find- 

 ing so large a number of the implements as to set at rest 



Fig. 72.— Edge view of the preceding. 



all question concerning their human origin. According 

 to Mr. Warren Upham, the glacial flood -plain of the Mis- 

 sissippi is here about three miles wide, with an elevation of 

 from twenty-fiYe to thirty feet above the river. It is in 

 a stream near the bottom of this glacial terrace that the 

 most of Miss Babbitt's discoveries were made, and Mr. 



