Vol. V No. 3 



Febkuart 4, 1915 



JOURNAL 



OP THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 Fred. E. Wright William R. Maxon Edson S. Bastdi 



GEOLOGICAL SUBVET 

 QEOPBYBICAL LABORATORY NATIONAL MUSEUM 



PUBLISHED SEMI-MONTHLY 

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



BT THE 



WASHINGTON ACADEMY OF SCIENCES 



OFFICB OP PUBLICATION 



THE WAVERLY PRESS 



BALTIMORE, MD, 



