ALL CORRESPONDENCE 
SHOULD BE ADDRESSED 
TO THE SECRETARY 
SMITHSONIAN INSTITUTION 
Wf>s/iwyton, IZS.A. 
UNITED STATES NATIONAL MUSEUM 
INTERNATIONAL EXCHANGES 
BUREAU OF AMERICAN ETHNOLOGY 
NATIONAL ZOOLOGICAL PARK 
ASTROPHYSICAL OBSERVATORY 
INTERNATIONAL CATALOGUE OF 
SCIENTIFIC LITERATURE 
May 2 5 , 1920 
To the Friends of the Smithsonian Institution 
I take pleasure in introducing to you the bearer 
of this letter. Dr. Alexander Wetmore, an Assistant Biologist 
in the Biological Survey of the United States Department of 
Agriculture, who is traveling in Argentina and other South 
American countries for the purpose of studying migratory 
birds. Dr. Wetmore will also make collections of birds, 
mammals and other material for the United States National 
Mus e urn. 
Any courtesies which you may find it possible to 
extend to him, or facilities which you may give him in 
furthering his work will be highly appreciated by this 
Institution. 
Secretary 
