Vol. VIII 



No. 17 



October 19, 1918 



JOUENAL 



OF THE 



WASHINGTON ACADEMY 



■ OF SCIENCES 



Adolph Knopf 



GBOLOaiCAI, SUBVET 



BOARD OF EDITORS 

 A. S. Hitchcock 



BUBBAU OF PI.ANT INDttSTBT 



J. Franklin Meteb 



-aUBEAU OF BTANDABDS 



ASSOCIATE EDITORS 



N. HOLLISTER 



BIOLOGICAI. 80CIBTT 



J. B. Norton 



BOTANICAL 80CIETT 



Sidney Paige 



OBOLOOICAL SOCIETT 



F. B. SiLSBEE 



PHILOSOPHICAL SOCIBTT 



R. B. SOSMAN 



CHEMICAL SOCIETT 



J. R. Sw ANTON 



ANTHBOPOLOGICAL SOCIETT 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY. AUGUST AND gEPTEMBER, WHEN MONTHLY 



BT THB 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



WILLLVMS & WILKINS COMPANY 



BALTIMORE, MD. 



V-- 



Kntered as second-class matter July 14, 1911 at the postoffice,at Baltimore, Maryland, under tbe Act of 

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

 Act of October 3, 1917. Authorixed on July 3, 1918 



