r Vol. ±1 SEC; a; No. 5^ 



September, 1916 



THE PHILIPPINE 



JOURNAL OF SCIENCE 



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



GENERAL EDITOR 



Section A 



CHEMICAL AND GEOLOGICAL SCIENCES 

 AND THE INDUSTRIES 



EDITBD. WITH THE COOPERATION OF 



W. E. PRATT,, A. M.;' H. C. BRILL, Ph.D.; Jy R. WRIGHT, Ph. D. 



G. W. HEISB, M. a; J. C. WITT, P'h.D.;.T. DAE,J,UAN, A. B. 



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



MANILA 



BUREAU OF PRINTING 



1916 



