14 MINERAL WATERS OF THE UNITED STATES. 



Potassic muriated saline waters. The authors do not know of any 

 waters which belong to the muriated saline group and yet contain 

 potassium as a predominating constituent. However, potassium is 

 sometimes present in these waters in considerable quantities. Its 

 therapeutic action is very much like that of the sodium salt. 



Lit hie muriated saline waters. Such waters as these would have the 

 usual action of the muriated saline class, with an intensified diuretic 

 effect, due to the lithium. 



Calcic muriated saline waters. These waters usually have sodium as 

 the predominating basic constituent, along with notable amounts of 

 calcium and sometimes magnesium. In general debility these waters 

 act as a tonic. They increase the flow of urine, sweat, and bile, and 

 are used in the treatment of scrofulous diseases and eczema. 



Sulphated saline waters. As a class, these waters are laxative or 

 purgative, according to the quantity taken, and should generally only 

 be used in moderate amounts. They are especially indicated where 

 long-continued stimulation of the intestinal activity is desired without 

 stimulation of the vascular system. 



Sodic and magnesic sulphated saline waters. In small doses these 

 waters act as laxatives and in large doses as purgatives. They increase 

 the flow of the intestinal fluids and of the urine, the latter being accom- 

 panied by an increased elimination of urea. Such waters as these are 

 of great service in eliminating syphilitic, scrofulous, and malarial 

 poisons from the system and in throwing off mercury and other 

 metallic poisons. Persons suffering from obesity, dropsy, derange- 

 ment of the liver, and Bright' s disease are perhaps the most benefited 

 by this class of waters. 



Potassic sulphated saline waters. While potassium may be present 

 in large enough quantities in the sulphated saline waters to deserve 

 mention, the authors do not know of any waters in which it is a pre- 

 dominating basic constituent. In so far as it is present, however, it 

 has very much the same effect as the two salts mentioned above. 



Calcic sulphated saline waters. This class of waters forms what is 

 known as the permanently hard group. They have no well-known 

 therapeutic action. 



Ferruginous sulphated saline waters and aluminic sulphated saline 

 waters. Iron and aluminum usually occur together when either is 

 present as a predominating metallic constituent in sulphated saline 

 waters. Since waters containing large quantities of iron and alumi- 

 num along with sulphuric acid ions are practically always acid, it is 

 best to consider them under the sulphated acid group. 



Nitrated saline waters. The authors have only found one water 

 which belongs to this class, and are undecided, on account of not being 

 able to examine the surroundings of the spring, whether the nitrates 



