778 T. C. CHAMBERLIN 



of the paper to the interpretation of the deposit in which the 

 human bones were found near Lansing, Kan., as given in your 

 Interpretation I, seems to fit the case and harmonize all the facts 

 in a very admirable way. If I were to dissent at all from your 

 conclusions as stated in Interpretation I, it would simply be to 

 the extent of saying that a lowering of the Missouri valley since 

 the bones and associated silts were deposited, through a space 

 somewhat less than fifteen or twenty-five feet, would probably 

 be amply sufficient. 



Samuel Calvin. 



STATEMENT OF PROFESSOR SALISBURY. 



With the general conclusion of- the above paper as expressed 

 under the heading, "The most conservative and the most prob- 

 able view," I am in perfect accord. If I have any suggestions 

 to add, they are the following : 



i. Aside from the distinct layer of clay in one wall of the 

 tunnel, I saw no structure which could properly be called strati- 

 fication. 



2. The band of water-laid clay seemed to me to imply stagnant 

 or essentially stagnant water. I am disposed to refer its origin 

 to a time when high water in the Missouri ponded the tributary. 

 Since the level of the clay is but a few feet above the historic 

 hisfh-water mark of the river, the stream need not have been 

 flowing more than a few feet above its present level when the 

 clay was deposited. I see no reason for supposing that the 

 introduction of the skeleton and the deposition of the clay were 

 far separated in time. 



3. The unequivocal layer of water-laid clay seems to me 

 strong evidence against the view that the material in which it 

 occurs is referable to any of the recognized loess epochs. I have 

 seen thousands of sections of loess, but never one with such a 

 seam of clay. 



4. I regard the presence of the unio shell as evidence that 

 the loess in which the tunnel is dug is not in its original posi- 



