JOINT COMMITTEE ON POLICY AND MANUSCRIPTS 
FOR THE UNITED STATES DEPARTMENT 
OF AGRICULTURE 
E. W. ALLEN, Chairman 
Chief, Office of Experiment Stations 
C. L. MARLATT 
Chairman, Federal Horticultural Board, and 
Associate Chief, Bureau of Entomology 
C. L. SHEAR 
Senior Pathologist in Charge, Plant Disease 
Survey and Pathological Collections 
FOR THE ASSOCIATION OF LAND-GRANT 
COLLEGES 
J. G. LIPMAN 
Dean, New Jersey College of Agriculture, and 
Director of Experiment Station 
H. W. MUMFORD 
Dean, Illinois College of Agriculture, and 
Director of Experiment Station 
S. B. HASKELL 
Director, Massachusetts Experiment Station 
EDITORIAL SUPERVISION 
M. C. MERRILL 
Assistant Director of Publications, in Charge of Scientific and Technical Manuscripts 
U . S. Department of A gricuUure 
All correspondence regarding articles from State Experiment Stations should be 
addressed to J. G. Lipman, New Jersey Agricultural Experiment Station, New 
Brunswick, N. J. 
Published semimonthly on the first and fifteenth of each month. This volume 
will consist of twelve numbers and the Contents and Index. 
Subscription price: Domestic, $ 4.00 a year, two volumes 
Single numbers, 20 cents 
Foreign, $ 5.00 a year, two volumes 
Single numbers, 25 cents 
If separates are desired they should be ordered at the time the manuscript is sent 
to the printer; they will be supplied at cost. 
Address all correspondence reg arding subscriptions and purchase of numbers and 
separates to the Superintendent of Documents, Government Printing Office, Wash¬ 
ington, D. C. 
