Vol. II January 19, 192 1 No. 2 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 Robert B. Sosman S. F. BivAke Sidney Paige 



GBOPHYSICAI. LABORATORY BUREAU OF PLANT INDUSTRY GBOI^OGICAI. SURVBY 



ASSOCIATE EDITORS 

 H. V. Harlan F. B. SilsbeE 



BOTANICAL SOCIBTY PHILOSOPHICAL SOCIBTY 



N. HOI^LISTER G. W. STOSB 



BIOLOGICAL SOCIKTV G80L0GICAL SOCIETY 



S. A. RoHWER J. R- Swanton 



BNTOMOLOGICAL SOCIBTY ANTHROPOLOGICAL SOCIETY 



} 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



BY THE 



WASHINGTON ACADEMY OF SCIENCES 



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OFiflCE OP PUBLICATION 



2 1 1 CHURCH STREET 



EASTON, PA. 



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



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



iu Section 1103, Act of October 3, 1917, Authorized on July 3, 1918. 



