u 

ORGANIZATION OF THE 
UNITED STATES DEPARTMENT OF AGRICULTURE 
November 12, 1924 
SCCLELOLU ROA OMCULLUG ES. eae eens ete Howarp M. Gore, Acting. 
WISSISECIE  SCCTCUUY 2 ue Seer ene see ene 
Director of Scientticaw ork === sees HS DAB AGE, 
Digector of Megulalony: WOrks. 22 ae sae WALTER G. CAMPBELL. 
Director, of Hatension: Work) see C. W. WARBURTON. 
OCU ON Soo 8 a RR aR 3 eR Peco Nes Ce, R. W. WILLIAMS. 
WEGLhCr- BUTCH SEUSS a cia eae ne ean CHARLES F.. MArvin, Chief. 
Bureau of Agricultural Heonomics________- Henry C. Taytor, Chief. 
BUCO Of ANTINVGl LGUs Ey) =e aan ees JOHN R. MOHLER, Chief. 
BUCO Of LLC EROUSULY = Se ees Wixnrtiam A. TAyior, Chief. 
EOF ESE SCP U1 CEL RE ae A ere ean 2 W.B? | GREBGEY= CALE Tx 
BUCO Of - CHEMUSULY 2 ie ie Sia ee eee C. A. Browne, Chief. 
SUG CAAL Of) SOLUS 2 ete Lee eee be eee MILTON WHITNEY, Chief. 
UTE COIL Of IUCONLOLOG Ue ee nem eee es ns L. O. Howarp, Chief. 
Bureau of Biological Survey________-____- E. W. Netson, Chief. 
BULCOUM OfeE LOUC RODS Se eee THomMAS H. MAcDONALD, Chief. 
Bureau of Home Heonomics2: ee eas LOUISE STANLEY, Chief. 
BUTCOL Of GUY 2a ea C. W. LARSON, Chief. 
Fixed Nitrogen Research Laboratory_____.. F. G. CotTRELL, Director. 
Office of Haperiment Stations 222232 BH. W. ALLEN, Chief. 
Office of Cooperative Extension Work_____ C. B. SmirH. Chief. 
Office Of PUOUCEHONnS= =) 2 Sia See eee L. J. Haynes, Director. 
TBH OY) 4) sea ae olsen a ond ge hk BA eles Pelt Baebes CLARIBEL R. BARNETT, Librarian. 
BCCCvOLOTUGULLULOLED OOLO == ne. = eas C. L. Marat, Chairman. 
Insecticide and Fungicide Board_______ a J. K. Haywoop, Chairman. 
Packers and Stockyards Administration__—_- CHESTER MorrILu, Assistant to the 
Grain Futures Administration..___.__----_- Secretary. 
This bulletin is a contribution from the 
Bureau of Plant Industry_________--_____- Witt1AmM A. Taytor, Chief. 
Office of Horticultural Investigations__—_ _L. C. CorBETT, in Charge. 
142 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAY BE PROCURED FROM 
THE SUPERINTENDENT OF DOCUMENTS 
GOVERNMENT PRINTING OFFICE 
WASHINGTON, D. C. 
AT 
30 CENTS PER COPY 
