Vol. III. No. 9. 



May 4, 1913. 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 



r 



T 



OF SCIENCES 



BOARD OF EDITORS 

 Frederick Leslie Ransome Carl S. Scofield Fred. Eugene Wright 



GBOLOQICAL SURTBT BURBAtT OF PLANT INDaSTRT QBOPHTSICAL LABORATOBT 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY. AUGUST AND SEPTEMBER, WHEN MONTHLY, 



BT THE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



THE WAVERLY PRESS 



BALTIMORE. WD. 



