HUMAN RELICS OF LANSING, KANSAS 777 



It thus appears that even if the burying gravels were of glacial 

 aspect, and the burial were a score or two score, or perhaps even 

 three or four score feet deep, it would require careful circum- 

 spection to remove legitimate and necessary doubts arising from 

 this source. This might be done in special cases on geologic 

 grounds, and the nature of the human deposit might in other 

 cases help to eliminate these sources of doubt, but special and 

 strong evidence of this kind is required to make a good case. 



So far as the glacial ages are concerned, evidence of man's 

 presence should be sought rather in the interglacial than in the 

 equivocal fluvial deposits. With careful identification and rea- 

 sonable circumspection, all sources of doubt as to age could 

 be removed from the intercalated deposits of the interglacial 

 epochs, and as these carry the relics of other life, they are com- 

 petent to carry those of man if he really lived in the region at 

 the time. 



I am permitted to add the following notes by Professor Calvin 



and Professor Salisbury, who examined the deposit with me, and 



who have been kind enough to read and criticise my manuscript, 



as prepared before my second visit. The observations of that 



visit strengthened the grounds on which they have indicated 



slight divergencies from my views. 



T. C. Chamberlin. 



STATEMENT OF PROFESSOR CALVIN. 



I thank you for the opportunity you have given me to read 

 the manuscript of your paper on "The Geologic Relations of the 

 Human Relics of Lansing, Kan." I wish to thank you further, 

 not for myself alone, but on behalf of all geologists engaged in 

 the study of problems similar to the one under discussion, for 

 the full and clear presentation of the behavior of rivers of the 

 Missouri type in connection with migrations of their meanders, 

 of their work in degradation and aggradation, in scour-and-fill, 

 while deepening and widening their valleys, and of the chang- 

 ing conditions which they impose on their tributaries. The 

 application of the principles discussed in the preliminary part 



