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



to acts of Congress, 



By WILLIAM A. INGHAM, 



Secretary of the Board of Oommissioners of the Geological Survey, 



In the oflace of the Librarian of Congress, at 



Washington, D. C. 



Printed by 



Edwin K. Mbybhs, State Printer, 



Barrlsburg^ Pa. 



