Vol,. 9 August 19, 1919 No. 14 



JOURNAL 



OP THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 A. S. Hitchcock J. Frankwn Meyer R. B. Sosman 



BDRBAU OF PLANT INDUSTRY BT7RBAO OP STANDARDS GEOPHYSICAL LABORATOKT 



ASSOCIATE EDITORS 

 H. V. Harlan Sidney Paige 



BOTANICAL SOCIETY GEOLOGICAL SOCIETY 



N. Holuster S. a. Rohwer 



BIOLOGICAL SOCIETY ENTOMOLOGICAL SOCIETY 



E. C. McKelvy F. B. Silsbee 



CHEMICAL SOCIETY PHILOSOPHICAL SOCISTV 



J. R. SWANTON 



ANTHROPOLOGICAL SOCIETY 



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 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



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WASHINGTON ACADEMY OF SCIENCES 



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Entered ai Second Class Matter, January 25,1919. at the post-ofi5ce at Eaaton, Pa., under the 

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