ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF AGRICULTURE. 
Octob.er 3, 1923. 
Secretary of Agriculture Henby 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. 
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. Howaed, Chief. 
Bureau of Biological Survey E. W. Nelson. Chief. 
Bureau of Public Roads Thomas H. MacDonald, Chi< 
Bureau of Home Economics Louise Stanley, Chief. 
Fued Xitrogen Research Laboratory F. G. Cottrell, Director. 
Division of Accounts and Disbursements A. Zappone, Chief. 
Library : < 'lakibel R. Barnett, Librarian. 
Federal Horticultural Board . C. L. Marlatt, Chairman. 
Insecticide and Fungicide Board J. K. Haywood, Chairman. 
Parkers and Stockyards Administration 1 Chester Morrill, Assistant to the 
Grain Future Trading Art Administration—.} Secretary. 
Office of the Solicitor R. W. Williams. Solicitor. 
This bulletin is a contribution from 
Bureau of Chemistry C. A. Browne. Chief. 
Office of Development Work David J. Price, Engineer in Charge. 
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