Vol. VIII No. 14 



August 19, 1918 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



Adolph Knopf 



GEOLOGICAI. SDBVET 



BOARD OF EDITORS 



A. S. Hitchcock 

 bxtbxat; of plant inoustbt 



J. Franklin Meyeb 



BDB£lik.U or BTAM0ABD8 



ASSOCIATE EDITORS 



N. HOLLISTER 



BIOLOGICAL SOCIETT 



J. B. NORTRON 



BOTANICAL SOCIETY 



Sidney Paige 



GEOLOGICAL SOCIETY 



F. B. SlLSBEB 



PHILOSOPHICAL SOCIETY 



R. B, SOSMAN 



CHEMICAL SOCIETY 

 J. R. Sw ANTON 



ANTHBOPOLOGICAL SOCIETY 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST AND SEPTEMBER, WHEN MONTHLY 



BY TBS 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 

 WILLIAMS & WILKINS COMPANY 

 BALTIMORE, MD. 



Entered as second-class matter July 14, 1911 at the postofEce at Baltimore, Maryland, under the Act of 

 July 18, 1881. Acoeptanse for mailing at special rate of posta<;e provided form Section 1103, 

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



