3 



S&S79y?£ 



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. 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. 



R. C. MCGREGOR, A. B. 



Volume VIII 



1913 



With 54 Plates, 38 Text Figures, and 4 Maps 





V 



MANILA 



BUREAU OF PRINTING 



1913 



233^54- 



