! 
ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF AGRICULTURE 
MAY 14, 1929 
Secretary of Agriculture Arthur M. Hyde. 
Assistant Secretary R. W. Dunlap. 
Director of Scientific Work A. F. Woods. 
Director of Regulatory Work Walter G. Campbell. 
Director of Extension Work , C. W- Warburton. 
Director of Personnel and Business Adminis- W. W. Stockberger. 
tration. 
Director of Information M. S. Eisenhower. 
Solicitor R. W. Williams. 
Weather Bureau Charles F. Marvin, Chief. 
Bureau of Animal Industry John R. Mohler, Chief. 
Bureau of Dairy Industry O. E. Reed, Chief. 
Bureau of Plant Industry , William A. Taylor, Chief. 
Forest Service R. Y. Stuart, Chief. 
Bureau of Chemistry and Soils H. G. Knight, Chief. 
Bureau of Entomology C. L. Marlatt, Chief. 
Bureau of Biological Survey Paul G. Redington, Chief. 
Bureau of Public Roads Thomas H. MacDonald, Chief. 
Bureau of Agricultural Economics Nils A. Olsen, Chief. 
Bureau of Home Economics Louise Stanley, Chief. 
Plant Quarantine and Control Administration- C. L. Marlatt, Chief. 
Grain Futures Administration J. W. T. Duvel, Chief. 
Food, Drug, and Insecticide Administration-. Walter G. Campbell, Director of 
Regulatory Work, in Charge. 
Office of Experiment Stations E. W. Allen, Chief. 
Office of Cooperative Extension Work C. B. Smith, Chief. 
Library Claribel R. Barnett, Librarian. 
This bulletin is a contribution from 
Forest Service R. Y. Stuart, Chief. 
Branch of Research Earle H. Clapp, Assistant For- 
ester, in Charge. 
Forest Products Laboratory Carlile P. Winslow, Director. 
Section of Wood Preservation — George M. Hunt, in charge. 
Senior Wood Technologist T. R. Truax. 
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