1912.] 
NATURAL SCIENCES OF PHILADELPHIA. 
551 
expressing appreciation and signed by the President and Secretaries 
was sent to those institutions, delegates, and correspondents who 
had shown their interest in the anniversary. 
Many letters asking for information were answered by the Corre¬ 
sponding Secretary personally or handed for reply to other members 
of the scientific staff. 
Statistics of the year’s correspondence follow: 
Communications received: 
Acknowledging receipt of the Academy’s publications 144 
Transmitting publications to the Academy. 63 
Requesting exchanges or the supply of deficiencies.. 1 
Invitations to learned gatherings, etc. 20 
Notices of deaths of scientific men 12 
Circulars concerning the administration of scientific institutions, etc.. 41 
Photographs and biographies of correspondents 8 
Letters from correspondents 9.5 
Miscellaneous letters 767 
Total received 1,151 
Communications forwarded: 
Acknowledging gifts to the library 1,198 
Requesting the supply of deficiencies in journals 133 
Acknowledging gifts to the museum 139 
Acknowledging photographs and biographies 10 
Letters of sympathy and congratulation, addresses, etc. 19 
Diplomas and notices of election of correspondents and of appointment 
of delegates 12 
Miscellaneous letters 386 
Annual reports, circulars, etc. 2,185 
Invitations.. 984 
Acknowledgments. 543 
Total forwarded 5,609 
Respectfully submitted, 
J. Percy Moore, 
Corresponding Secretary. 
REPORT OF THE LIBRARIAN. 
The additions to the library received, recorded, and placed during 
the past year have amounted to 8,793. They have been received 
from the following sources: 
Exchanges. 
3,662 
James Aitken Meigs Fund. 
117 
I. V. Williamson Fund 
2,397 
Editors... 
72 
United States Department of 
Colorado Agricultural College 
70 
Agriculture. 
950 
Thomas B. Wilson Fund 
48 
General Appropriation 
786 
Imperial Department of Agricul- 
Authors. 
225 
ture of the British West 
Mrs. Henry C. McCook. 
139 
Indies. 
28 
