104 



REPORT ON EXCHANGES 



The history and condition of domestic exchanges, from their com- 

 mencement to the present time, are exhibited in the following table: 



Year. 



1846- 



1851. 



1.-52. 



1853 



1854. 



18." 5. 



1856. 



1857 



1858. 



1859 



1830. 



1801. 



1862. 



1863. 



1864. 



1865 



1866. 



1867. 



1868. 



1869 



1870. 



1871. 



1872. 



1873. 



1874. 



1875. 



1876. 



1877. 



1878 . 



1879. 



1880. 



1881. 



1882. 



1883 . 



-1850 



From the foregoing table it will be observed that the addition to the 

 Smithsonian library, during the year 1883 amounted to 12,675 parcels. 

 Of this number 2,432 were received through the regular channels of 

 transmission, while the remaining parcels arrived through the mails. 

 All the additions to the Smithsonian library being the direct results 

 of the system of exchanges, this excess should properly be added to the 

 number of packages received. Heretofore mail parcels for the Smith- 

 sonian library have been entirely ignored by the exchange office, not 

 passing through this channel, but being delivered directly into the 

 library. Tin's method, however, works great injustice to the exchange 



