BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 3, pp. 1-152, frontispiece, pls. 1, 2 



PROCEEDINGS OF THE SUMMER MEETING HELD AT 

 WASHINGTON AUGUST 24 and 25, 1891 



H. L. FAIRCHILD, Secretary 



ROCHESTER 



PUBLISHED BY THE SOCIETY 



March, 1892 



