t><^^. 



THE PHILIPPINE 



JOURNAL OF SCIENCE 



ALVIN J. COX, M. A., Ph. D. 



GENERAL EDITOR 



Section A 



CHEMICAL AND GEOLOGICAL SCIENCES 

 AND THE INDUSTRIES 



EDITED WITH THE COOPERATION OP 



W. D. SMITH, Ph. D.; H. D. GIBBS, Ph. D.; W. C. REIBLING, Ch. E. 

 W. E. PRATT, A. M.; R. R. WILLIAMS, M. S.; D. S. PRATT, Ph. D. 



RICHARD c. McGregor, a. b. 



Volume IX 



1914 



With 41 Plates, 38 Text Figures, and 3 Maps 



129876 



MANILA 



BUREAU OF printing 



1914 



ZSS^SA 



