CONTENTS. 



Page. 



COX, ALVIN J. Calorimetry, and the Determination of 

 -the Calorific Value of Philippine and Other Coals 

 from the Results of Proximate Analysis 171 



BACON, RAYMOND F., and GANA, VICENTE Q. 

 The Economic Possibilities of the Mangrove Swamps 

 of the Philippines 205 



COX, ALVIN J. Philippine Raw Cement Materials _. 211 



EDITORIAL 231 



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