109 
Stated Meeting, April Tth, 1871. 
Mr. Frauey, Vice-President, in the Chair. 
Present, twelve members. 
Donations to the Library werereceived from the Academies 
at Berlin and Leyden, the Royal Society at London, and the 
Editors of Nature, the Old and New, and Penn Monthly, the 
New Bedford Public Library, Medical Journal, Franklin In- 
stitute, College of Pharmacy, Academy of Natural Science at 
Philadelphia, the Engineer Bureau at Washington, Hssex In- 
stitute, Wisconsin Historical Society, and from Prof. Mayer, 
of Bethlehem. 
Prof. Cresson laid before the Society a map of Fairmount 
Park, reduced by photolithography to avery small size, yet ex- 
hibiting every line clearly. 
Prof. Cope described additional new genera and species 
from the Port Kennedy Cavern, nearly one half of which were 
of South American types. 
Mr. Chase read a communication on “The Resemblance of 
Atmospheric, Magnetic and Oceanic Currents.” 
Lieut. Dutton explained his views of the origin of Regional 
Subsidence and Elevation. 
The curators were requested to provide for the proper 
preservation of the Photographs of Lines of Magnetic Force, 
presented to the Society by Prof. Mayer. 
Pending nominations were read and the meeting was ad- 
journed. 
