ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF 
AGRICULTURE 
January 3, 1924. 
Secretary of Agriculture Henry C. Wallace. 
Assistant Secretary '!. Howard M. Gore. 
Director of Scientific Work E. D. Ball. 
Director of Regulatory Work Walter G. Campbell. 
Director of Extension Work C. W. Warburton. 
Solicitor R. W. Williams, 
Weather Bureau Charles F. Marvin, Chief. 
Bureau of Agricultural Economics Henry C. Taylor, Chief. 
Bureau of Animal Industry John R. Mohler, Chief. 
Bureau of Plant Industry William A. Taylor, Chief. 
Forest Service W. B. Greeley, Chief. 
Bureau of Chemistry C. A. Browne, Chief. 
Bureau of Soils Milton Whitney, Chief. 
Bureau of Entomology L. O. Howard, Chief. 
Bureau of Biological Survey E. W. Nelson, Chief. 
Bureau of Public Roads Thomas H. MacDonald, Chief. 
Bureau of Home Economics Louise Stanley, Chief. 
Office of Experiment Stations E. W. Allen, Chief. 
Fixed Nitrogen Research Laboratory F. G. Cottrell, Director. 
Publications L. J. Haynes, In Charge. 
Library Claribel R. Barnett, Librarian. 
Federal Horticultural Board C. L. Marlatt, Chairman. 
Insecticide and Fungicide Board J. K. Haywood, Chairman. 
Packers and Stockyards Administration _1 Chester Morrill, Assistant to 
Grain Futures Administration J the Secretary. 
This bulletin is a contribution from 
Bureau of Animal Industry John R. Mohler, Chief. 
Pathological Division John S. Buckley, Chief. 
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