Vol. XI, SEC. A, No. 6 



November, 1916 



THE PHILIPPINE 



JOURNAL OF SCIENCE 



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



GENERAL EDItOR 



Section A 



CHEMICAL AND GEOLOGICAL SCIENCES 

 AND THE INDUSTRIES 



EJDITED WITH THE COOPEBATION OF 



W. K PRATT, A. M. ; H. C. BRILL,' Ph. D. ; J. R. WRIGHT, Ph.D. 

 G. W. HEISE, M.S.; J. C. WITT, PH.D.; T. DAR JUAN, A. B. 



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



MANILA 

 BUBBAU OP PfimTING 



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