ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 

 WHEN THIS PUBLICATION WAS LAST PRINTED 



Secretary of Agriculture Henry A. Wallace. 



Assistant 'Secretary Rbxford G. Ttjgwbll. 



Director of Scientific Work . A. F. Woods. 



Director of Extension Work C.W. Warbubton. 



Director of Personnel and Business Admin- W. W. Stockbbhgbr. 

 istration. 



Director of Information M. S. Eisenhower. 



Solicitor.^. ^ Seth Thomas. 



Agricultural Adjustment Administration Chester C. Davis, Administrator. 



Bureau of Agricultural Economics Nils A. Olsbn, CAie/- 



Bureau of Agricultural Engineering S. H. McCroby, CAie/, 



Bureau of Animal Industry John R. Mohler, Chief. 



Bureau of Biological Survey .Iay N. D abling, Chief. 



Bureau of Chemistry and Soils:. H. G. KmasT, Chief. 



Office of Cooperative Extension Work C. B. Suith, Chief. 



Bureau of Dairy Industry O. E. He^d, Chief. 



Bureau of Entomology Lbe A. Strong, Cfe'e/- 



Office of Experiment Stations James T. Jardinb, C^ie/. 



Food and Drug Administration Walter G. Campbell, CWe/. 



Forest Service.-^ Ferdinand A. Silcox, CWe/. 



Grain Futures Administration J. W. T. Dvv^i,, Chief . 



Bureau of Home Economics Louise Stanley, Chief. 



Library _ Clabibel R. Babnbtt, Librarian. 



Bureau of Plant Industry Knowles A. Rybbson, Chief. 



Bureau of Plant Quarantine A. S. Hoyt, Acting Chief. 



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



Weather Bureau Willis R. Gsegg, Chief. 



This circular is a contribution from 



Bureau of Animal Industry John R. Mohler, Chief. 



Zoological Division M. C. Hali,, Chief . 



35 



U.S. GOVERNMENT PRINTING OFFICE: 1934 



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



