Entered, for the Commonwealth of Pennsylvania, in the year 1889, according 



to acts of Congress, 



By WILLIAM A. INGHAM, 



Secretary of the Board of Commissioners of the Geological Suy^vey^ 



In the office of the Librarian of Congress, at 



Washington, D. C. 



Printed by 



Edwin K. Meyehs, State Printer, 



Harrisburg, Pa. 



