ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF AGRICULTURE. 
January 28, 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. 
Acting Director of Extension Work C. W. Warburton. 
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. 
Fixed Nitrogen Research Laboratory F. G. Cottrell, Director. 
Division of Accounts and Disbursements A. Zappone, Chief. 
Library Claribel R. Barnett, Librarian. 
Federal Horticultural Board C..L. Marlatt, Chairman. 
Insecticide and Fungicide Board J. K. Haywood, Chairman. 
Packers and Stockyards Administration i Chester Morrill, Assistant to the 
Grain Future Trading Act Administration J Secretary. 
Office of the Solicitor R. W. Williams, Solicitor. 
This bulletin is a contribution from 
Bureau of Soils Milton Whitney, Chief. 
Division of Soil Chemical Investigations. .. P. L. Gile, in Charge, 
42 
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