Vol. VIII No. 9 



May 4, 1918 



JOUENAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 Adolph Knopf A. S. Hitchcock J. Franklin Meyer 



OEOLOOICAL 6URVBT BUBEAC OP PLANT INDU6TBT BTTBEACT OF eTANDABDS 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



BY THH 



WASHINGTON ACADEMY OF SCIENCES 



OFFICB OF PUBLICATION 

 WILLIAMS & WILKINS COMPANY 

 BALTIMORB, MD. 



Entered aa eecond-claaa matter July 14, 1911, at tha post o95oa at Baltimore, Maryland, under tha Act of 



July 16, 1894 



