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Vol III. MARCH, 1916 No. 3 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
The specificity of proteins and carbohydrates in relation to genera, species 
and varieties Edward Tyson Reichert 91 
Mechanics of dormancy in plants. William Crocker 99 
The periodicity of freshwater algae Edgar Nelson Transeau 121 
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 ar, 1914. at the post office at Lancaster, Pennsylvania, 
under the act of March 3, 1879. 
