JOURNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



VOLUME IV, 1914 



BOARD OF EDITORS 

 Frederick Leslie Raxsome Carl S. Scofield Fred. Eugene Wright 



GEOLOGICAL SURVEY BUREAU OF PLAXT INDUSTRY GEOPHYSICAL LABORATORY 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY. 



BY THE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



THE WAVERLY PRESS 



BALTIAIORE, MD. 



