Vol. V No. G 



March 19, 1915 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 Frbd. E. Wright . William R. Maxon Edson S. Bastin 



GSOPBTBICAX. LABOBATOBT NATIONAI, MtlBEUM OKOLOQIOAL BXIRVBT 



PUBLISHED SEMI-MONTHLY 

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



BTTHE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



THE WAVERLT PRESS 



BALTIMORE, MD. 



