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 Seth Thomas. 



Agricultural Adjustment Administration Chester C. Davis, Administrator. 



Bureau of Agricultural Economics Nils A. Olsen, 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. 



Office of Cooperative Extension Work C. B. Smith, 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. Stlcox, Chief. 



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



Bureau of Home Economics Louise Stanley, Chief. 



Library Clartbel R. Barnbtt, Librarian. 



Bureau of Plant Industry Frederick D. Richey, Chief. 



Bureau of Public Roads : Thomas H. MacDonald, Chief. 



Weather Bureau Willis R. Gregg, Chief. 



This circular is a contribution from 



Forest Service Ferdinand A. Stlcox, Chief. 



Branch of Research Earle H. Clapp, in charge. 



91 



U.S. GOVERNMENT PRINTING OFFICE: 19 35 



For sale by the Superintendent of Documents, Washington, D. C. Price 10 cents 



