ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 

 WHEN THIS PUBLICATION WAS LAST PRINTED 



Secretary of Agriculture-- Henry A. Wallace. 



Under Secretary Rexford G. Tugwell. 



Assistant Secretary M. L. Wilson. 



Director of Extension Work C. W. Warburton. 



Director of Personnel ' W. W. Stockberger. 



Director of Information M. S. Eisenhower. 



Director of Finance W. A. Jump. 



Solicitor Mastin G. White. 



Agricultural Adjustment Administration Chester C. Davis, Administrator. 



Bureau of Agricultural Economics A. G. Black, Chief. 



Bureau of Agricultural Engineering S. H. McCrory, Chief. 



Bureau of Animal Industry John R. Mohler, Chief. 



Bureau of Biological Survey- J. N. Darling, Chief. 



Bureau of Chemistry and Soils H. G. Knight, Chief. 



Bureau of Dairy Industry O. E. Reed, Chief. 



Bureau of Entomology and Plant Quarantine- Lee A. Strong, Chief. 



Office of Experiment Stations James T. Jardine, Chief. 



Food and Drug Administration- Walter G. Campbell, Chief. 



Forest Service ,. Ferdinand A. Silcox, Chief. 



Grain Futures Administration J. W. T. Duvel, Chief. 



Bureau of Home Economics _ Louise Stanley, Chief. 



Library Claribel R. Barnett, Librarian. 



Bureau of Plant Industry Frederick D. Richey, Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chief. 



Soil Conservation Service H. H. Bennett, Chief. 



Weather Bureau- Willis R. Gregg, Chief. 



This circular is a contribution from 



Bureau of Plant Industry Frederick D. Richey, Chief. 



Division of Forage Crops and Diseases-- A. J. Pieters, Principal Agrono- 

 mist, in Charge. 



12 



U. S. GOVERNMENT PRINTING OFFICE: 



For sale by the Superintendent: of Documents, Washington, D. C. ----- - Price 5 cents 



