(9E747 

 C55 



Entered, for the Commonwealth of Pennsylvania, in the year 1885, according 



to acts of Congress, 



By WILLIAM A. INGHAM, 



Secretary of the Board of Commissioners of Geological Survey, 



In the office of the Librarian of Congress, at 



Washington, D. C. 



Klrctrntypid :i!ic] printed by 



l. \ \ i B. ii m:t. State Printer, 

 Harrisburg, Pa. 



L 



