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 14-1 



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 95 



M iscellaneous letters 767 



Total received 1,1.51 



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 2,1S5 



In vi t ations 984 



Acknowledgments o4.'! 



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 



36 



