Vol. XIII; SBC. A, No. 3 



THE PHILIPPINE 



JQURNil. OF SCIENCE 



ALVm J, cox, M. A., Ph. D. 



GENERAL EDITOR 



Section a 



chemical and geological sciences 

 and the industries 



EDITED WrnrtHB C»6PBEATJ0N OF 



H. C. BRIIX, Ph. D.; J. R. WRIGHT, Ph. D.-Q. W, HEISE, M. S. 

 T. DAR aUAN, A. B., Ph. D.; A. H. WfeLLS, A, B. 



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



BIANTLA 

 BUBBACT OP PEIjmNG 



1913 



