ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 

 WHEN THIS PUBLICATION WAS LAST PRINTED 



Secretary of Agriculture Abthue 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. Warbubton. 



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

 tration. 



Director of Information M. S. Eisenhower. 



Solicitor E. L. Marshall. 



Weather Bureau Charles F. Marvin, Chief. 



Bureau of Animal Industry John R. Mohleb, Chief. 



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



Bureau of Plant Industry William A. Taylob, Chief. 



Forest Service R. Y. Stuabt, Chief. 



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



Bureau of Entomology C. L. Maelatt, Chief. 



Bureau of Biological Survey Paul G. Redington. Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chief. 



Bureau of Agricultural Economies 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 Walter G. Campbell, Di red or of 



Regulatory Work, in Charge. 



Office of Experiment Stations . Chief. 



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



Library Claribel R. Babnett, Librarian. 



This circular is a contribution from 



Bureau of Animal Industry John R. Mohleb, Chief. 



Zoological Division Maurice C Hall, Principal 



Zoologist, Chief. 



55 



U. S. GOVERNMENT PRINTING OFFICE: 1930 



For sale by the Superintendent of Documents, Washington. D. C. Price 15 cents 



