Vol. XXiH FEBRUARY 3,1923 No* S 
CONTENTS 
^ \ . - Page 
Use of Alternating Temperatures in the Germination of 
Seeds - - - - - - - - - - 295 
GEORGE T. HARRINGTON 
(Contribution from Bureau oi Plant Industry) 
Water Content of Barley Kernels during Growth and 
Maturation - - - - _ _ _ - _ 333 
H. V. HARLAN and MERRITT N. POPE 
, (Contribution from Bureau of Plant Industry) 
Bacterial Leaf spot of Geranium in the Eastern United 
States - ■' - - - - , - 36i 
NELLIE A. BROWN 
{Contribution from Bureau of Plant Industry) 
Hydrogen-ion Concentration and Varietal Resistance of 
Wheat to Stemrust and Other Diseases - - - 373 
ANNIE MAY HURD 
(Contribution from Bureau erf Plant Industry) 
Cotton-Wilt, a Seed-Borne Disease - - - - - 387 
JOHN A. ELLIOTT 
(Conttibuttan bom Arkansas Agricultural Experiment Station) 
PUBLISHED BY AUTHORITY OF THE SECRETARY OFAGRICULTURE 
WITH THE COOPERATION OF THE ASSOCIATION 
OF LAND-GRANT COLLEGES 
WASHINGTON, Du, C. 
GOVERNMENT PRINTING OFFICE 
