ANNUAL REPORT SMITHSONIAN INSTITUTION, 1937 xV 



ASTROPHYSICAL OBSEKVATOEY 



Director. — Charles G. Abbot, 

 Assistant director. — Loyal B. Aldrich. 

 Research assistant. — Frederick E. Fowle, Jr. 

 Associate research assistant. — Wiu^iam II. Hoover. 



DIVISION OF RADIATION AND ORGANISMS 



Director. — ^Chakles G. Abbot. 



Assistant director. — Eakl S. Johnston. 



Associate research assistant. — Edward D. McAlistek. 



Assistant in radiation research.- — Lbxand B. Cr^iKK, 



Research associate. — Ft.orence E. Meier. 



