1886.] 



NATURAL SCIENCES OF PHILADELPHIA. 



371 



Letters of acknowledgment, numbering 

 From British and Colonial Societies, etc., . 

 From Continental European Societies, etc., 

 From American Societies, etc., 

 Letters of transmittal, number in total, 



Representing twentj'-eight foreign societies 



etc., and but two American. 

 Letters asking deficiencies and desiring exchange 



number 



Miscellaneous letters, 



105 

 16 

 18 

 15 

 36 



11 

 11 



The number of societies with which we exchange publications 

 shows an annual increase greatly to the advantage of those who 

 use the library. 



Respectfully submitted, 



George H. Horn, M. D., 



Corresponding Secretary. 



REPORT OF THE LIBRARIAN. 



I have the pleasure of reporting to the Academy that 3765 

 additions have been made to the Library from December 1, 1885, 

 to November 30, 1886, These consist of 481 volumes, 3245 

 pamphlets and parts of periodicals, and 39 maps. 



We are indebted to the following for the additions, a detailed 

 list of which accompanies the report : 



Societies, 1513 



Editors 915 



Isaiah V. Williamson Fund, 648 



Authors, 333 



C. H. Hitchcock, , . . . 46 



Department of the Interior, , 30 



University of Kiel, . . , 30 



Wilson Fund, 24 



War Department 24 



Geological Survey of Sweden, 23 



University of Wurzburg, , . 14 



Stuart Wood, 13 



Thos. Meehan, 11 



Geological Survey of Belgium, 11 

 Geological Survey of Pennsyl- 

 vania, 10 



British Museum, 9 



Dr. Jos. Leidy, 7 



Chas. M. Betts, 7 



Geological Survey of India, , 7 



Her Majesty's Government, . 



Treasury Department, . . . 



Engineer Department, U.S.A. 



Australian Museum, . . . 



Geological Survey of New 



Jersey 



George Vaux, 



Geological Survey of Russia, 



Cambridge Scientific Instru- 

 ment Company, . , , . 



Geological Survey of Rouma- 

 nia, 



United States Commission of 

 Fish and Fisheries, . . . 



Geological Survey of Canada, 



Smithsonian Institution, , , 



Hon. Charles O'Neil, . , , 



J, Stockton Hough, . . . 



George W, Tryon, Jr., . . 



E. Indian Government, . . 



6 

 6 

 5 

 5 



5 

 4 

 4 



3 



3 



3 



2 



2 



2 

 o 



