







66 BOTANICAL GAZETTE [JANUARY 
also Austrocknung ‘des Keimfadens, fiir das Weiterwachsen 
absolut tédlich ist.” 
I am pleased to express my thanks to Professor Pfeffer for 
his kind advice and encouragement in the progress of this work 
completed in his laboratory at Leipsic. 
CoRNELL UNIVERSITY, 
Ithaca, N. Y. 
