ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF AGRICULTURE 
March 10, 1928 
Secretary of Agriculture W. M. Jardine. 
Assistant Secretary R. W. Dunlap. 
Director of Scientific Work A. F. Woods. 
Director of Regulatory Work Walter G. Campbell. 
Director of Extension C W. Warburton. 
Director of Personnel and Business Admin- 
istration W. W. Stockberger. 
Director of Information Nelson Antrim Crawford. 
Solicitor R. W. Williams. 
Weather Bureau Charles F. Marvin, Chief. 
Bureau of Animal Industry John R. Mohler, Chief. 
Bureau of Dairy Industry L. A. Rogers, Acting Chief. 
Bureau of Plant Industry William A. Taylor, Chief. 
Forest Service W. B. Greeley, 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 Lloyd S. Tenny, Chief. 
Bureau of Home Economics Louise Stanley, Chief. 
Federal Horticultural Board C. L. Marlatt, Chairman. 
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 
Bureau of Chemistry and Soils H. G. Knight, Chief. 
Chemical and Technical Research C. A. Browne, Chief. 
Chemical Engineering Division David J. Price, Engineer in Charge. 
