Vol. io March 4, 1920 No. 5 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 J. Franklin Meyer Robert B. Sosman Ai«bxandsr WbtmorA 



BOBBAC OF STANDARDS OBOPHYSICAL LABORATOKT BIOLOGICAL StTRVBT 



ASSOCIATE EDITORS « 



j 



H. V. HARI.AN S. A. Robwbr i 



BOTANICAL SOCIBTT BNTOMOLOOICAL SOCIBTT ) 



N. HOLLISTER F. B. SiLSBEB i 



BIOLOGICAL SOCIBTT * PHILOSOPHICAL SOCIBTT 'i 



Sidney Paige J. R. Swanton i 



OBOLOOICAL SOCIBTT ANTHROPOLOGICAL SOCI8TV ! 



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EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



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Act of August 24, 1912. Acceptance for mailing at special rate of pottage proTided for in J 



Section 1103 Act of October 3. 1917, Authorised on July 3, 1918 ] 



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