Entered, for the Commonwealth of Pennsylvania, in the j'ear 1884, according 



to acts of Congreas, 



By WILLIAM A. INGHAM, 



Secretary of the Board of Commissioners of Geological Survey, 



In tlie office of the Librarian of Congress, at 



Washington, D. C. 



Electrotyppfl and printed by 



LANE S. HAUT, State Printer, 



Hairisburjc, I'a. 



