L I . BRARY 0F congress 
0 002 811 592 1 
ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF AGRICULTURE. 
Secretary of Agriculture . 
Assistant Secretary . 
Director of Scientific Work . 
Director of Regulatory Work . 
Weather Bureau . 
Bureau of Agricultural Economics . 
Bureau of Animal Industry . 
Bureau of Plant Industry ... 
Forest Service . 
Bureau of Chemistry . 
Bureau of Soils . 
Bureau of Entomology . 
Bureau of Biological Survey . 
Bureau of Public Roads . 
Fixed Nitrogen Research Laboratory . 
Division of Accounts and Disbursements . 
Division of Publications . 
Library . 
States Relations Service . 
Federal Horticultural Board . 
Insecticide and Fungicide- Board . 
Packers and Stockyards Administration 
Grain Future Trading Act Administration... 
Office of the Solicitor 
Henry C. Wallace. 
C. W. Pugsley. 
E. D. Ball. 
Charles F. Marvin, Chief. 
Henry C. Taylor, Chief. 
John R. Mohler, Chief. 
William A. Taylor, Chief. 
W. B. Greeley, Chief. 
Walter G. Campbell, Acting Chief.. 
Milton Whitney, Chief. 
L. 0. Howard, Chief. 
E. W. Nelson, Chief. 
Thomas H. MacDonald, Chief. 
F. G. Cottrell, Director. 
A. Zappone, Chief. 
Edwin C. Powell, Acting Chief. 
Claribel R. Barnett, Librarian. 
A. C. True, Director. 
C. L. Marlatt, Chairman. 
J. K. Haywood, Chairman. 
Chester Morrill, Assistant to the. 
Secretary. 
R. W. Williams, Solicitor. 
:} 
This bulletin is a contribution from 
Bureau of Plant Industry... 
Office of Investigations in 
20 
. William A. Taylor, Chief. 
Forest Pathology. Haven Metcalf, Pathologist in 
Charge. 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAY BE PROCURED FROM 
THE SUPERINTENDENT OF DOCUMENTS 
GOVERNMENT PRINTING OFFICE 
WASHINGTON, D. C. 
AT 
10 CENTS PER COPY 
PURCHASER AGREES NOT TO RESELL OR DISTRIBUTE THIS 
COPY FOR PROFIT.—PUB. RES. 57, APPROVED MAY 11, 1922 
V 
