DEPARTMENT OF THE INTERIOR 



ALBERT B. FALL. SECRETARY 



NATIONAL PARK SERVICE 



STEPHEN T. MATHER. DIRECTOR 



FOSSIL FORESTS OF TM 

 YELLOWSTONE NATIONAL' fM. 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



williaW^L stern 



SCHOOL OF FORHSTY 

 YALE UNIVERSITY 

 NEW HAVEN, CONN., U.S.A. 



NOV 



