UNITED STATES NATIONAL MUSEUM 
BUREAU OF AMERICAN ETHNOLOGY 
ASTROPHYSICAL OBSERVATORY 
NATIONAL ZOOLOGICAL PARK 
NATIONAL COLLECTION OF FINE ARTS 
FREER GALLERY OF ART 
NATIONAL GALLERY OF ART 
ALL CORRESPONDENCE 
SHOULD BE ADDRESSED 
TO THE SECRETARY 
SMITHSONIAN INSTITUTION 
INTERNATIONAL EXCHANGES 
DIVISION OF RADIATION AND 
ORGANISMS 
February 18, 1939* 
TO WHOM IT MAT CONCERN: 
This will serve to introduce Dr. Alexander 
Yietmore, Assistant Secretary, Smithsonian Institution, 
and head of the United States National Museum, who is 
traveling officially in Mexico for the purpose of making 
collections of birds and other objects for the United 
States National Museum. 
Any courtesies that may be afforded him 
in the course of this work will be much appreciated by 
the Smithsonian Institution. 
