252 GEOLOGICAL RECONNAISSANCE OF THE DOMINICAN REPUBLIC. 



Mineral analysis and classification of water from dug well of Ibarra & Gosling, 3 kilometers 



from Santo Domingo City, on Santa Cruz road. 

 (Well 56 meters deep; altitude of mouth about 36 meters. Sample collected by C. P. Ross April 7, 1919 



Analyst, M. D. Foster.] 



Constituents. Parts per million. 



Silica (SiOj) 12 



Iron (Fc) .35 



Calcium (Ca) 119 



Magnesium (Mg) 9 . 3 



Sodium and potassium (Na+K) 17 



Carbonate radicle fC0 3 ) .0 



Bicarbonate radicle (HC0 3 ) 328 



Sulphate radicle (S0 4 ) 32 



Chloiide radicle (CI) 48 



Nitrate radicle (N0 3 ) 7.2 



Total dissolved solids 434 



Organic matter. 13 



Classification. 



Quality for boiler use Poor 



Quality for domestic use Poor. 



Quality for irrigation Good. 



Chemical character CaC0 3 . 



Mineral content Moderate. 



The water supplies of the Monte Cristi district are discussed by C. P. 

 Ross on pages 177-180. Water can certainly be obtained from wells there, 

 and in favorable situations artesian flows may be possible, but some of 

 the water may be rather strongly mineralized. 



In the parts of the Samana Peninsula that were examined the conditions 

 are favorable for obtaining only small quantities of water from wells. 

 Analyses of some waters on the peninsula are appended. 



Mineral analysis and classification of water from spring just below head of Arroyo Salado, 



Samana Peninsula, Samana Province. 



[Sample collected by C. P. Ross June 30, 1919. Analyst, M. D. Foster.] 



Constituents. Parts per million. 



Silica (SiO») 13 



Iron (Fe) .13 



Calcium (Ca) 94 



Magnesium (Mg) 20 



Sodium and potassium (Na+K), calculated 235 



Carbonate radicle (C0 3 ) .0 



Bicarbonate radicle (HC0 3 ) 298 



Sulphate radicle (SO«) 40 



Chloride radicle (CI) 370 



Nitrate radicle (N0 3 ) . 61 



Organic matter 14 



Total dissolved solids 957 



Classification. 



Quality for boiler use Fair. 



Quality for domestic use Fair. 



Quality for irrigation Good. 



Chemical character CaC0 3 . 



Mineral content Moderate. 



