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 W alter G. Campbell. 



Director of Extension Work C. W. Warburton. 



Director of Personnel and Business Adminis- W. W. Stockberger. 

 t rat ion. 



Director of Information M. S. Eisenhower. 



Solicitor E. L. Marshall. 



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 Paul G. Redington, 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 C. L. Marlatt, Chief. 



Office of Experiment Stations James T. Jardine, Chief. 



Food and Drug Administration W alter G. Campbell, Director of 



Regulatory Work, in Charge. 



Forest Service R. Y. Stuart, Chief. 



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



Bureau of Home Economies Louise Stanley, Chief. 



Library Claribel R. Barnett, Librarian. 



Bureau of Plant Industry William A. Taylor, Chief. 



Bureau of Plant Quarantine Lee A. Strong, Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chief. 



Weather Bureau Charles F. Marvin, Chief. 



This circular is a contribution from 



Bureau of Plant Industry William A. Taylor, Chief. 



Division of Mycology and Disease Survey C L. Shear, Principal Patholo- 

 gist, in Charge. 



35 



U.S. GOVERNMENT PRINTING OFFICE: 1932 



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



