Vol. VI 



AUGUST, 1911 



No. 4 



THE PHILIPPINE 



JOURNAL OF SCIENCE 



EDITED BY 



PAUL C. FREER, M. D., Ph. D. 



WITH THE COOPERATION OF 



W. D. SMITH, Ph. D.; ALVIN J. COX, Ph. D.; H. D. GIBBS, B. S. 

 W. C. REIBLING, B. S.; NELLIE LOUISE COOK, B. L., M. A. 



PUBLISHED BY 



THE BUREAU OF SCIENCE 



OP THE 

 GOVERNMENT OF THE PHILIPPINE ISLANDS 



A. Chemical and Geological Sciences and 

 THE Industries 



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MANILA 



BUREAU OF PRINTING 



1911 



