

CONTENTS 



Page. 



COX, ALVIN J., and ARGuELLES, A. S. The Soils of the Island 



of Luzon 1 



WRIGHT, J. R., and SMITH, O. F. A Quantitative Determination 

 of the Radium Emanation in the Atmosphere and Its Variation 

 with Altitude and Meteorological Conditions 51 



WEST, AUGUSTUS P., and COX, ALVIN J. Burning Tests of 



Philippine Portland Cement Raw Materials 79 



u. s. 



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