﻿ORGANIZATION OF THE UNITED STATES DEPARTMENT OF 

 AGRICULTURE. 



tary of Agriculture Henry C.Wallace. 



Assistant Secretary C. W. Pvgsley. 



Din dor of Scientific Work E. D. Ball. 



Director of Regulatory Work 



Weather Bureau Charles F. Marvin, ( 'h ief. 



Bureau of Agricultural Economics Henry C. Taylor, Chief. 



Bureau,of An imal 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 John L. Cobbs, Jr., 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 [Chester Morrill, Assistant to the 



Grain Future Trading Act Administration J Secretary. 



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



This bulletin is a contribution from — 



Bureau of Chemistry Walter G. Campbell, Acting Chief. 



Microchemical Laboratory B.J. Howard, in Charge. 



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COPY FOR PROFIT.— PUB. RES. 57, APPROVED MAY 11, 1923 



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