Vol III. 
No. 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
The exchange of ions between the roots of Lupinus albus and culture solu- 
tions containing three nutrient salts. 
Rodney H. True and Harley Harris BartlEtt 47 
On the identity of Blanco's species of Bambusa E. D. Merrill 58 
The region of greatest stem thickness in Raphidophora . . Frank C. Gates 65 
The mechanism of movement and the duration of the effect of stimulation 
in the leaves of Dionaea. William H. Brown 68 
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 Febmary 21, 1914. at the post office at Lancaster, Pennsylvania, 
under the act of March 3, 18^9. 
