1883.] NATURAL SCIENCES OF PHILADELPHIA. 319 



REPORT OF THE CORRESPONDING SECRETARY. 



The Corresponding Secretary reports that the business of his 

 office presents but little variation from that of preceding years. 



There have been many favorable replies received from corre- 

 sponding societies to our request for an interchange of publications 

 by mail, the result of which will be an earlier acquaintance with 

 the doings of other societies, greatly to the advantage of working 

 naturalists. 



The Museum has received many additions during the year, a 

 detailed account of which will appear in the Curator's report. 

 These have been promptly- acknowledged, to the number of 119. 



There have been seven Correspondents elected during the year, 

 and acknowledgment has been received from but one who was 

 elected during the present ^ear. 



Our corresponding societies generall}' acknowledge the recep- 

 tion of our publications by letter, and accompany their own 

 publications with letters of transmission. 



Letters of acknowledgment have been received num- 

 bering, 67 



Letters transmitting publications have been received 

 numbering, ........ 42 



Letters concerning postal interchange numbering, . 19 

 Ackowledgments from Corresponding Members, . 1 

 Miscellaneous coi'respondence, . . . .21 



In the latter number are many asking for deficiencies in their 

 series of our publications. These have been favorably responded 

 to whenever possible. There has been a considerable accession 

 to our_ exchange list during the current 3'ear. 

 Respectfully submitted, 



George H. Horn, M. D., 



Corresponding Secretary. 



REPORT OP THE LIBRARIAN. 



During the twelve months ending November 30, 1883, 3003 

 additions have been made to the library, an» increase of 208 over 

 the growth of 1882. These additions have consisted of 360 

 volumes, 2615 pamphlets and separate parts of periodicals, and 

 28 maps, sheets, photographs, etc. 



