ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF AGRICULTURE 
December 15, 1924 
Secretary of Agriculture Howard M. Gore. 
Assistant Secretary 
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. 
Bureau of Dairying C. W. Larson, Chief. 
Fixed Nitrogen Research Laboratory F. G. Cottrell, Director. 
Office of Experiment Stations E. W. Allen, Chief. 
Office of Cooperative Extension Work C. B. Smith, Chief. 
Office of Publications L. J. H aynes, Director. 
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 the 
Grain Futures A dministration J Secretary. 
This bulletin is a contribution from— 
Bureau of Plant Industry William A. Taylor, Chief. 
Office of Dry-Land Agriculture I nves- E. C. Chilcott, Senior Agriculturist 
tigations. in Charge. 
28 
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WASHINGTON, D. C. 
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