Vol. V No. .5 



March 4, 1915 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOAKD OF EDITORS 

 Fred, E. Wkiqht William R. Maxon Edson S. Bastin 



OKOPHTBICAIi t.ABORA,TOBT NATIONAfc UDBBUU QEOLOQICAt. STTRVET 



PUBLISHED SEMI-MONTHLY 

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



BT THE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



THE WAVERLY PJ(iES3 



BALTIMORE, MD. 



