ADVERTISEMENT. 



This publication contains the names of foreign establishments 

 with which' the Smithsonian Institution is in communication 

 through the medium of the system of International Exchanges. 



There is prefaced to the list of correspondents a statement of 

 the rules governing the transmission of publications and also the 

 names and locations of exchange bureaus and agencies in other coun- 

 tries through which distribution is effected. Following the list 

 of correspondents is an alphabetical index to towns. 



The Institution would deem it a favor if any corrections to 

 the list were reported whenever inaccuracies are discovered. 



S. P. LANGLEY, 



Secretary. 



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