DEPARTMENT OF THE INTERIOR 



U. S. GEOGRAPHICAL AND GEOLOGICAL SURVEY OF THE ROCKY MOUNTAIN REGION 

 J. W. POWELL IN Charge 



OIsT 



PREHISTORIC TREPHINING 



CRANIAL AMULETS 



R0BP:RT FLETCHER M. R. C. S. Eng. 



ACT. ASST. SURGEON U. S. AEMr 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1882 



