Vol. III. No. 5. 



March 4, 1913. 



JOUKNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 Frederick Leslie Ransome Carl S. Scofield Fred. Eugene Wright 



QBOLOQICAL SaRVBT BURBAU OF PLANT INDUSTRY aBOFHTSICAL LABORATOBT 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST AND SEPTEMBER^ WHEN MONTHLY, 



BY THE 



WASHINGTON ACADEMY OF SCIENCES 



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the waverly press 



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