IX, A, 4 Cox et al.: Water Supplies in the Philippines 383 



of a patient and help make possible the remarkable cures often 

 recorded. It is not the purpose of this paper to go into any dis- 

 cussion of the medical value of different mineral medicinal wa- 

 ters. Haywood and Smith^* have published a classification of 

 mineral waters, showing their physiologic action and therapeutic 

 applications. 



There are a large number of mineral and thermal springs in 

 the Philippine Islands, many of which are located in places ad- 

 mirably suited for health resorts. At the present time the 

 springs at only three places are much visited; namely, near 

 Baguio, at Los Banos, and at Sibul. However, there are a large 

 number of springs which were well known in Spanish times and 

 which, with proper exploitation, would undoubtedly again be- 

 come popular. 



The systematic study of the mineral waters of the Philippine 

 Islands is still far from complete. The Spanish Government 

 instituted a rather elaborate series of investigations concerning 

 Philippine mineral waters, the results of which have already 

 been published.''^ 



At the request of the Speaker of the Philippine Assembly, an 

 investigation of the mineral springs of Cebu was conducted by 

 Mr. Gana of the Bureau of Science. The results of his work are 

 incorporated in Table VIII. 



Though some preliminary work has been done on the radioac- 

 tivity of Philippine waters, this subject still remains practically 

 untouched.*^" It is hoped that in the near future it will be pos- 

 sible to devote time to this field of investigation. 



The analyses of mineral spring waters examined at the Bureau 

 of Science are given in Table VIII. The sanitary analyses of 

 many of these waters have already been given in Table IV. 

 In Table VIII are included all waters of which mineral analyses 

 have been made, regardless of whether such waters are properly 

 classified as mineral water or not. With regard to the naming 

 of mineral waters according to their prominent constituents, the 

 classification of Peale, as modified by Haywood and Smith,«i has 

 been used throughout. 



"Mineral Waters of the United States. Bull. U. S. Dept. Agr., Bur. 

 Chem. (1905), 91, 12. 



^' Centeno, J., del Rosario y Sales, A., y de Vera y Gomez, J., Memoria 

 descriptiva de los manantiales minero-medicinales de la Isla de Luzon. Ma- 

 drid (1890). Casariego, E., y de Vera y Gomez, J., Estudio descriptivo de 

 algunos manantiales minerales de Filipinas. Introduction by A. de Aviles. 

 Manila (1893). 



""Bacon, This Journal, Sec. A (1906), 2, 122. 



" Loc. cit., 9. 



