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THE PHILIPPINE 



JOURNAL OF SCIENCE 



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



GENERAL EDITOR 



Section A 



CHiJMiCAL AN0 GEOLOGICAL SCIENCES 

 AND THE INDUSTRIES 



EDITED WITH THE GOOPBRATION OF 



H. C. BRILL, PH. D.; J. R. WRIGHf, Ph. D.; G. W. HEISE, M. S. 



T. DAR JUAN, A. B., PH. D.; A. H. WELLS, A. B. 



Ri a, MCGREGOR, A. R; H. E. KUPFER, (A. B. 



MAKILA 



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