Vol. VII No. 1 



Januaky 4, 1917 



JOUKNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 William R. Maxgn N. Ernest Dorset Apolph Knopf 



NATIONAL MUSEUM BUREAU OP STANDARDS GEOLOGICAL SURVEY 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



WILLIAMS & WILKINS COMPANY 



BALTIMORE, MD. 



Entered as second-class matter July 14, at the post office at Baltimore, Maryland, under the Act of 



July 16,1894 



