EEPOET ON THE OPERATIONS OF EXCHANGES. 



87 



the National Museum, In tbe year 1881, with 407 boxes, only 264 con- 

 tained books, while 45 entire boxes of specimens were sent by the 

 National Museum and Fish Commission. 

 The transmissions of 1882 compare with former years as follows : 



In all cases the number of boxes given in this report includes the 

 boxes sent under the system of Government document exchange to the 

 various Governments specified in the special report apj)ended, and the 

 transmissions to Canada, which will be found specified in the detailed 

 report on domestic exchanges. 



The 422 boxes sent during the year 1882 were distributed as follows: 



