ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 
WHEN THIS PUBLICATION WAS LAST PRINTED 
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 Admin- 
istration W. W. Stockberger. 
Director of Information M. S. Eisenhower. 
Solicitor E. L. Marshall. 
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. McDonald, Chief. 
Bureau of Agricultural Engineering S. H. McCrory, Chief. 
Bureau of Agricultural Economics Nils A. Olsen, Chief. 
Bureau of Home Economics Louise Stanley, Chief. 
Plant Quarantine and Control Administration. Lee A. Strong, Chief. 
Grain Futures Administration J. W. T. Duvel, Chief. 
Food and Drug Administration W r alter G. Campbell, Director of 
Regulatory Work, in Charge. 
Office of Experiment Stations James T. Jardine. Chief. 
Office of Cooperative Extension Work C. B. Smith, Chief. 
Library Claribel R. B arnett, Librarian. 
This bulletin is a contribution from 
Bureau of Dairy Industry O. E. Reed, Chief. 
Division of Market-Milk Investigations. Ernest Kelly, Senior Market Milk 
Specialist, Chief. 
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