gg The Philippine Journal of Science i»i6 



Although no great accuracy is claimed for the most recent 

 analyses, since part of them were made by field methods, the 

 results may be considered conclusive, especially as a number 

 of determinations were checked volumetrically and showed good 

 agreement. The detailed analyses of the artesian well waters 

 of Iloilo and vicinity, as performed during the course of the 

 present investigation, are given in Table II. 



Color is rated in approximate accordance with the Hazen 

 platinum-cobalt color standard.' 



As will be seen from the analyses, the waters listed are all 

 brackish.* Some of the artesian wells show an appreciable 

 variation in their flow, being influenced by the tides; in fact, 

 some are intermittent and flow only at high tide. The quality, 

 too, of these waters, shows certain variations, but whether the 

 changes noticed are also dependent on the tides has not yet been 

 established. It is clear that seepage from the ocean is not a 

 factor. The absence of sulphates is a marked peculiarity. Bar- 

 ber '•' has already pointed out that flowing artesian wells are 

 practically sterile, and this series of tests confirms his conclu- 

 sions. None of the drilled wells examined showed an excessive 

 bacteria count. 



In view of their high mineral content, their brackishness, their 

 mildly laxative properties, and their excessive hardness, it does 

 not seem advisable to try to develop any of these waters as a 

 source of municipal supply. 



MAASIN 



The Maasin proposition involves the installation of the type 

 of system which has already been found successful at Manila 

 and Cebu; namely, the impounding of the water from a river 

 and the reservation of the watershed drained by that river from 

 settlement and trespass. 



The advantages of the Maasin project are the certainty of an 

 adequate supply of water throughout the year and the possibility 

 of supplying other to\Mis, between Maasin and Iloilo, with 

 much-needed water systems; its disadvantages are the distance 

 (at least 25 kilometers) which the water must be piped, and 

 the cost of the enterprise (more than 2,000,000 pesos). 



'Am. Chem. Journ. (1892), 14, 300. 



' All the waters in Table II, with the possible exception of Nos. 7, 8, 

 13, and 15, and perhaps one or two others, were being used for drinking 

 purposes. They are certainly more wholesome than any other natural 

 waters available in the districts they supply. 



'This Journal, Sec. B (1913), 8, 443. 



