Vol. II 



October 4, 1921 



No. 16 



JOURNAL 



OP THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



Robert B. Sosman 



DBOPBVSICAX, LABORATORY 



BOARD OF EDITORS 

 S. F. Blakb 



BDRBAD OP PLANT IMDDSTRT 



SiDNST PaIOB 



080LOOTCAL SUKVBV 



ASSOCIATE EDITORS 



H. V. Harlan 



BOTANICAL SOCISTT 



N. HOLLISTSR 



BIOLOGICAL SOCIBTV 



S. A. ROHWER 



BNTOMOLOOICAL SOCISTT 



P. B. SiLSBSS 



PHILOSOPHICAL SOCIBTV 



G. W- Stose 



OBOLOOICAL SOCIBTV 

 J. R. S WANTON 



ANTBROPOLOOtCAL SOCIBTV 



PUBLISHED semi-monthly 

 except in JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



BY THB 



WASHINGTON ACADEMY OF SCIENCES 



office op PUBLICATION 



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 easton, pa. 



Entered as Second Class Matter, Tanuary 25, 1919, at the post-office at Easton, Pa., under the 



Act of August 24, 1912. Acceptance for mailing at special rate of postage provided for 



'\a Section 1103. Act of October 3, 1917. Authorized on July 3, 1918. 



