Vol. VIII 



No. ^20 



December 4, 1918 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



Adolph Knopf 



QEOLOGICAL SUBVBT 



BOARD OF EDITORS 

 A. S. Hitchcock 



BOBBiD or PLANT INDD8TBT 



ASSOCIATE EDITORS 



N. HOLUSTER 



BIOLOGICAL SOdBTT 



J. B. Norton 



BOTANICAL SOaBTT 



Sidney Paige 



OBOLOGICAL 80CIBTT 



J. Franklin Meter 



BUBEAU OP 8TANDABDS 



F. B, SlLSBEE 



PHILOSOPmOAL 80CIETT 

 R. B. SOSMAN 



CHEMICAL SOCIBTT 

 J. R. Sw ANTON 



AMTBBOPOLOGICAI, SOCIBTT 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



BY THB 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 

 WILLIAMS & WILKINS COMPANY 

 BALTIMORE. MD. 



Entered as aecond-cJass matter July 14, 1911 at the pwstoffica at Baltimore, Maryland, under the Act of 



July 16, 1864. Acceptance for mailing at special rate of poetace provided for in Section 1103, 



Act of October 3, 1917, Authorized on July 3, 1918 



