ORGANIZATION OF THE UNITED STATES DEPARTMENT OF 

 AGRICULTURE. 



Secretary of Agriculture Henky G. Wallace. 



Assistant Secretary C. W. Ptjgsley. 



Director of Scientific Work E. D. Ball. 



Director of Regulatory Work . 



Weather Bureau Charles F. Marvin, Chief. 



Bureau of Agricultural Economics Henry C. Taylor, Chief. 



Bureau of Animal Industry John R. Mohler, Chief. 



Bureau of Plant Industry William A. Taylor, Chief. 



Forest Service W. B. Greeley, Chief. 



Bureau of Chemistry Walter G. Campbell, Acting Chief. 



Bureau of Soils Milton Whitney, Chief. 



Bureau of Entomology L. O. Howard, Chief. 



Bureau of Biological Survey E. W. Nelson, Chief. 



Bureau of Public Roads Thomas H. MacDonald, Chief. 



Fixed Nitrogen Research Laboratory F. G. Cottrell, Director. 



Division of Accounts and Disbursements A. Zappone, Chief. 



Division of Publications Edwin C. Powell, Acting Chief. 



Library Claribel R. Barnett, Librarian. 



States Relations Service A. C. True, Director. 



Federal Horticultural Board C. L. Marlatt, Chairman. 



Insecticide and Fungicide Board J. K. Haywood, Chairman. 



Packers and Stockyards Administration "I Chester Morrill, Assistant to 



Grain Future Trading Act Administration J the Secretary. 



Office of the Solicitor R. W. Williams, Solicitor. 



This bulletin is a contribution from the — 



Bureau of Biological Survey E. W. Nelson, Chief. 



Division of Food Habits Research W. L. McAtee, in Charge. 



22 



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PURCHASER AGREES NOT TO RESELL OR DISTRIBUTE THIS 

 COPY FOR PROFIT. — PUB. RES. 57, APPROVED MAY 11, 1922 



