REPORT OF THE SECRETARY XIH 



BUEE.VU OF AMERICAN ETHNOLOGY 



Chief. — Matthew W. Stirling. 



Senior ethnologists. — H. B. Colijns, Jr., John P. Hakbington, John R. Swanton. 



Senior archeologist. — Feank H. H. Robebts, Jr. 



Senior anthropologist. — Julian H. Steward. 



Associate anthropologist. — W. N. Fenton. 



Editor. — M. Helen Palmkb. 



Librarian. — Mikiam B. Kktchum. 



Illustrator. — Edwin G. Cassedy. 



internationaIj exchange service 



Secretary {in charge). — Charles G. Abkot. 



national zoological park 



Director. — Wilijam M. Mann. 

 Assistant Director. — Ernest P. Walker. 



astrophysical observatory 



Director. — Charles G. Abbot. 



Division of Astrophysical Rksearch : Loyal B. Aldrich, assistant director: 



William H. Hoover, senior astrophysicist. 

 Division op Radiation and Organisms : Earl S. Johnston, assistant director ; 



Edward D. JNIcAlister, senior physicist ; Leland B. Clark, senior mechanical 



engineer; Rohert L. Weintraub, junior biochemist. 



