BUREAU OF PLANT INDUSTRY. 
Chief of Bureau, BEVERLY T. GALLOWAY. 
Assistant Chief of Bureau, WILLIAM A. TAYLOR. 
Editor, J. HE. ROCKWELL. 
Chief Clerk, JAMES E. JONES. 
SoIL-BACTERIOLOGY AND WATER-PURIFICATION INVESTIGATIONS. ~ 
SCIENTIFIC STAFF. 
Karl F. Kellerman, Physiologist in Charge. 
T. R. Robinson, Assistant Physiologist. 
T. G. McBeth, E. R. Allen, R. C. Wright, and Edna H. Fawcett, Scientific Assistants. 
F. L. Goll and L. T. Leonard, Laboratory Aids. 
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