CONTENTS 



No. 1, January, 1918 "^ 



Page. 



Heise, George W., and Behrman, A. S. Water analysis in the field.. 1 



One plate. 



Behrman, A. S. Two field methods for the determination of the 



total hardness of water „ 21 



Witt, J. C. Some generalizations on the influence of substances on 



cement and concrete 29 



No. 2, March, 1918 



Wright, J. R., and Heise, G. W. The radium content of water from 



the China Sea 49 



Two text figures. 



Witt, J. C. Methods of burning pottery in the vicinity of Manila 



and their influence on the quality of the product 59 



Two plates and one text figure. 



COCANNOUER, JOSEPH A. Tests of some imported garden legumes.... 67 



RE5VIEWS 97 



No. 3, May, 1918 



YcASiANo. Francisco R., and Valencia, Felix V. Practical opera- 

 tion of a producer-gas power plant 99 



Nine text figures. 



MiRASOL, JosE Y JiSON. Fertilizer experiments with sugar cane 135 



Two text figures. 



No. 4, July, 1918 



Witt, J. C., and Reyes, F. D. The solubility of Portland cement and 



its relation to theories of hydration 147 



One text figure. 



Reinking, Otto A. Philippine economic-plant diseases 165 



Twenty-two plates and forty-three text figures. 



No. 5, September, 1918 

 Reinking, Otto A. Philippine economic-plant diseases (concluded).. 217 



No. 6, November, 1918 

 Valencia, F. V. Mechanical extraction of coir 275 



One plate. 



King, Albert E. W. The mechanical properties of Philippine coir 



and coir cordage compared with abaca (Manila hemp) 285 



Four text figures. 



Ycasiano, F. R. a recalculation of certain data on steaming tests 



of Philippine coals 341 



Concepcion, Isabelo. Analysis of normal Filipino urine 347 



Review 361 



Index 363 



161175 7 iii 



