Vol.. lo November 19, 1920 No. 19 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 J. Franelik Mbysk Robbkt B. Sobmam S. P. BtAXS 



BUBBAU Oy BTAMDARDS OBOPBVBICAI. LABOBATOBT BOKBAU OF PLAMT DIDCSTBT 



ASSOCIATE EDITORS 



H. V. Haklam S. a. RohwSk 



BOYAMICAI, BOCISTT BHTOMOUKIICAI. BOCtBTT 



N. H0U.ISTSR P. B. SiLSBBB 



BIObOOICAb BOCUTV PBtII,OSOFBieAL BOCIBTT 



SlDNBY PaIGB J. R. SWANTON 



OVOLOOIGAL BOCISTT AHTKBOPOLOOICAL BOCEBTT 



PUBLISHBD SBm-MONTHLY 

 SXCBPT m JULY, AUGUST, AND SSPTBMBBR, WHBN MONTHI,Y 



BT TBS 



WASHINGTON ACADEMY OF SCIENCES 



09VICB OF PUBUCATION 



ail CHURCH STRBBT 



BASTON, PA. 



Bnttred aa Seccnd CIbm Matter, January 25, 1919. at the poet-effiea at Baataa. Pa., nadar the 

 Act «f Aagntt 24, 1912. Acceptance for mailing at fpccial rate ml paitage pravided far ia 

 Section 1103 Act of October 3. 1917. Aathoriaed aa Jaly 3. 1918 



