Vol X, Sec. A, No. 5 September, 1915 



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 OF 



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



J. R. WRIGHT, Ph. D.; H. C. BRILL, Ph. D.; G. W. HEISE, M. S. 



R. C. MCGREGOR, A. B.; H. E. KUPFER, Ph. B. 



MANILA 

 BUREAU OF PRINTING 



1915 



