ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE 
WHEN THIS PUBLICATION WAS LAST PRINTED 
Secretary. .0fn. Agriculture <=. 235. Es eee ARTHUR M. Hype. 
A SStSEQCUNE DS CCK CE OLY ee Ee eee R. W. DUNLAF. 
Director. of Scientific. Work=-22_-- = A. F. Woops. 
Direetor of Regulatory Work__—=-=s~ == 3. ~ WALTER G. CAMPBELL. 
Director of Extension Work __ == C. W. WARBURTON. 
Director of Personnel and Business Adminis- W. W. STOCKBERGER. 
tration. 
Director. of In fOormaion==2 ee M. S. EISENHOWER. 
OUCTEOT Ae x9 aie es Se ete EK. L. MARSHALL. 
Bureau of Agricultural Economics_________~ Nis. A. OLSEN, Chief. 
Bureau of Agricultural Engineering________-_ S. H. McCrory, Chief. 
Bureau of Animal Industry______-________~ JOHN R. MOHLER, Chief. 
Bureau of Biological Survey_.______--__- ___ PAuL G. REpDINeTON, Chief. 
Bureau of Chemistry and Soils_____________ H. G. KnNiIGuT, Chief. 
Office of Cooperative Extension Work____-__ C. B. SmirH, Chief. 
Bureau Of Dairy ndusity. 2 O. E. REEpD, Chief. 
BuUreat_ of Entomology. = 2 a2 eee C. L. Mariatt, Chief. 
Office of Experiment Stations__—_- = JAMES T. JARDINE, Chief. 
Food and Drug Administration_____________ WALTER G. CAMPBELL, Director of 
Regulatory Work, in Charge. 
HORCSENS CTANCE S28 SS ee ee ces eee R. Y. Stuart, Chief. 
Grain Futures Administration______________ J. W. T. DuUVEL, Chief. 
Bureau of Home Hconomics___=——---_--___- LovuIsE STANLEY, Chief. 
UOT EOP a enh A 2 es. GOR So SS ee GA Se CLARIBEL R. BARNETT, Librarian. 
Burcauof Platt indusirys = See WILLIAM A. TAYLOR, Chief. 
Bureaw of Plant -Quarantine. 2 LEE A. STRONG, Chief. 
BUTeCOM Of LUO ROCdss = = as ees THoMAS H. MACDONALD, Chief. 
Weather sBuUreduces ke 5 2 eee CHARLES F’. MARVIN, Chief. 
This circular is a contribution from 
BUREAU. Of. PLONE INOUSE a ee 2 een ee WiLLiam A. Taytor, Chief. 
Division of Tobacco and Plant Nutrition__. W. W. Garner, Principal Physiol- 
ogist, in Charge. 
8 
U.S. GOVERNMENT PRINTING OFFICE: 19383 
For sale by the Superintendent of Documents, Washington, D. C. - - - - Price 5 cents 
