BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 3, pp. 453-541, pls. 14-16 



PROCEEDINGS OF THE FOURTH ANNUAL MEETING, HELD 

 AT COLUMBUS, OHIO, DECEMBER 29, 30, AND 31, 1891 



HERMAN LeROY FAIRCHILD, Secretary 



(With Index. Also Contents, etc, of Vol. 3, pp. i-xii) 



ROCHESTEB 



PUBLISHED BY THE SOCIETY 



November, L892 



