Ill 



The following table will show the number of these addi- 

 tions by volumes, parts and pamphlets : 



Books presented by individuals 



" purchased 



" deposited by the Republican Institut'n 



" received in exchange for our publica- 

 tions 



" received in exchange from the Smith- 

 sonian Institution for duplicates 

 from our Library 



" received in exchange from the Ameri- 

 can Academy for duplicates from 

 our Library 



Total . 



A careful estimate has also been made of the number of 

 books now in the Library — there are 7,262 volumes, 1,596 

 parts of volumes and 2,333 pamphlets — in all, 11,191. 



Owing to a more liberal policy instituted by the Council 

 about two years since in the distribution of our publications 

 to scientific bodies abroad, we now find our Library rapidly 

 increasing in size in the Transactions of Learned Societies, 

 and every new invoice received through the medium of the 

 Smithsonian Institution (to which we are deeply indebted 

 for their importation free of every expense), adds to their 

 number and value. The ratio of increase has been very 

 great, as may be seen on comparison of the reports of the 

 Librarian for the past few years ; a year ago the Librarian 

 reported the number of volumes and pamj^hlets received 

 during the previous year from this source as 237; the 

 record for the past year shows 953, or four times as many. 

 The number of scientific associations and periodicals at home 

 and abroad with which the Society now exchange their 

 publications is 243.* 



The Library has been weeded of superfluous duphcates dur- 

 ing the past and a portion of the previous year, the accumula- 

 tions of years ; a MS. catalogue of them has been made with 

 prices annexed, and the more important part of them pub- 

 Hshed in the sale catalogue of Messrs. Wm. Wood & Co., 

 our agents in New York ; their sale has already amounted 



A list of these will be found on page 148. 



