[I, Sec. A, Nc 



October, 1913 



THE PHILIPPINE 



JOURNAL OF SCIENCE 



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



GENERAL EDITOR 



Section A 



CHEMICAL AND GEOLOGICAL SCIENCES 

 AND THE INDUSTRIES 



EDITED WI1 



OPERATIO 



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

 W. E. PRATT, A. M.: R. R. WILLIAMS. M. S.; D. 3. PRATT, PH. D. 



richakd c. mcgregor, a. b. 



■ 



MANILA 



BUREAU OF PRINTING 



1913 



*tft 



at* 



