CONTENTS 



No. 1, January, 1915 



Page. 



Pratt, David S. Papain: Its commercial preparation and digestive 



properties - 1 



Two plates and 4 text figures. 



BliACKW^ooD, 0. H. A determination of the diurnal variation of the 

 radioactivity of the atmosphere at Manila by the active deposit 

 method 37 



Five text figures. 



GiBBS, H. D., and Brill, H. C. Diethylsuccinosuccinate (ethyldioxy- 

 dihydroteraphthalate) : A study of its constitution, some deriv- 

 atives, and absorption spectra 51 



Three text figures. 



Heise, George W. Water supply for the city of Iloilo 65 



One text figure. 



Heise, George W. Boiler w^aters of Iloilo Province 75 



Smith, Warren D., Eddingfield, F. T., and Fanning, Paul R. A 



preliminary check list of Philippine minerals 81 



Reviews 97 



No. 2, March, 1915 



Gibbs, H. D. Proposed modification of ylang-ylang oil standards.... 99 

 Brill, Harvey C., and Agcaoili, Francisco. Philippine oil-bearing 



seeds and their properties: II 105 



Two text figures. 



Brill, Harvey C. The enzymes of cacao 123 



Heise, George W. Water supplies in the Philippine Islands: II 135 



Reviews 171 



No. 3, May, 1915 



Smith, Warren D. Notes on a geologic reconnaissance of Mountain 



Province, Luzon, P. I 177 



Five plates and 5 text figures. 



Smith, Warren D. Notes on the geology of Panay 211 



One plate and 3 text figures. 



No. 4, July, 1915 



Pbatt, Wallace E. The location of artesian wells in the Philippine 



Islands from a geologic viewpoint 231 



Pratt, Wallace E. Petroleum and residual bitumens in Leyte 241 



One plate and 2 text figures. 



Pratt, Wallace E. On the occurrence of petroleum in the Province 



of Cebu 281 



Tvio text figures. 



iii 



