Vol. IV. 
JULY, 1917 
ITo. 7 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
■'^ J U L J 
4^: 
Fertility in Cichorium intybus: the sporadic occurrence of self-fertile plants 
among the progeny of self -sterile plants A. B. Stout 375 
Inheritance of endosperm color in maize .Orland E. White 396 
The influence of light and chlorophyll formation on the minimum toxic 
concentration of magnesium nitrate for the squash. 
R. B. Harvey and R. H. True 407 
The use of the vibration galvanometer with a 60-cycle alternating current in 
the measurement of the conductivity of electrolytes. Newton B. Green 411 
Immunochemical studies of the plant proteins: proteins of the wheat seed 
and other cereals. Study DC. R. P. Wodehouse 417 
The toxicity of galactose and mannose for green plants and the antagonistic 
action of other sugars toward these Lewis Knudson 430 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At 41 North Queen Street, Lancaster, Pa. 
Entered as second-class matter February 21, 1914, at the post office at Lancaster, Pennsylvania, 
under the act of March 3, 1879. 
