Vol. III. * No. 17 



-October 19, 1913. 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 Frederick Leslie Ransome Carl S. Scofield - Fred. Eugbnb Wright 



OEOLOaiCAL SURVEY BUR^A.n OV PLANT INDD8TBT QEOPHYSICAL LABORATOBT 



PUBLISHED SEMI-MONTHLY 

 BXCBPT IN JULY, AUGUST AND SEPTEMBER, WHEN MONTHLY, 



V BY THE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 

 THE WAVERLY PRESS 



