r, 1916 



:HE 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.;. H. C. miLl^V^.10u^ J . R. WiaGm/ Fh^ 

 |; G. W. HEISE,.M.S.; J..G'. WITT, •!>». D-VT; DARJUAN, A. B. 



■R. c. McGregor, a.f.; h. e. kupfer, a. b. 



MANILA 

 BIJBEAU OF.BBINTIKG 



IMS 



