Vol. VI No. 10 



May 19, 1916 



JOURNAL 



OP THE 



WASHINGTON ACADEMY 



OF SCIENCES 





BOARD OF EDITORS 

 William R. Maxon Edson S. Bastin N. Ernest Dorse* 



WATJCHAL MUBEtJil CHOI or.IC »■ SCBV8Y IHTBEAU OF 8TAMDABDS 



PUBLISHED SEMI- MONTHLY 

 EXCEPT IN JULY, AUGUST. AND SEPTEMBER. WHEN MONTHLY 



BT THE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE of publication 



WILLIAMS & WILKIN3 COMPANY 

 BALTIMORE, MD. 



Entered as ^eeond-class matter July 14, 1011, at the poet offica at Baltimore. Maryland, under the Act of 



/ 16. 1894 



