Natural Sciences of Philadelphia 
Library 
ADMINISTRATION OF THE LIBRARY 
LIBRARY COMMITTEE 
Wither Stone, Chairman, F. J. Keeley 
Henry Tucker T. Chalkley Palmer 
Spencer Trotter. 
Spencer Trotter, Librarian. 
William J. ¥ ox, Assistant Librarian. 
During 1922, the additions to the library total 7,168. The ap¬ 
parent decrease, from the total for 1921, is due to the receipt in the 
former year of 581 autograph letters of the late S. S. Haldeman, so 
that there is an actual increase in the accession of books and pam¬ 
phlets. Pamphlets and parts of periodicals received during the 
year amounted to 6,270. Of these 717 are volumes, 146 maps, 1 
printed sheet, and 34 photographs. 
The sources of accession are as follows: 
Exchange. 3541 
Isaiah V. Williamson Fund. 2122 
United States Department of Agriculture.. 548 
General Appropriation for Purchase of Books. 256 
Authors. 70 
Texas Agricultural Experiment Station. 47 
Pennsylvania Bureau of Topographic and Geologic Survey. 46 
Mr. Clarence B. Moore. 41 
Pennsylvania State Library. 35 
Estate of Frank Thomson. 34 
Trustees of British Museum (Natural Flistory). 30 
Editors. 28 
New York State College of Agriculture. 26 
Cornell University Agricultural Experiment Station. 21 
American Entomological Society. 19 
Provincial Museum, Toronto, Canada. 14 
Department of Archives and History, Alabama. 13 
