136 ECONOMICAL MINERALOGY. 



acid, they contain also a small residuary portion of air, in which nitrogen exists in larger 

 quantity than in the atmosphere. 



Walton or Iodine Spring. During the year 1839, a spring was discovered a few rods 

 north of the High Rock Spring, which received this name. Recording to Dr. Emmons, who 

 analyzed the water, the following is the composition in one pint : 



Chloride of sodium, 23.37 grains. 



Carbonate of magnesia, 9. 37 " 



Carbonate of lime, 3. 25 " 



Carbonate of soda, 0.25 " 



Carbonate of iron, 0.12 " 



Hydriodate of soda, 0.48 " 



36.84 grs. 



CUBIC INCHES. 



Carbonic acid gas, 41.25 



Atmospheric air, 0.50 



41.75 



The peculiarities of this water are, the absence of oxide of iron, and the large proportion of 

 iodine which it contains. 



Another spring was discovered near the Pavilion, which exceeds all the other springs at 

 Saratoga in the amount of carbonic acid gas which it evolves, although the proportion of its 

 saline constituents is less than that of the Congress Spring. So copious is the flow of gas, 

 that by the usual manipulation, a tumbler or bell glass may be quickly filled with it. 



The water of the Union Spring, recently opened, according to the published analysis of 

 Dr. James R. Chilton, contains a larger proportion of saline ingredients than any of the pre- 

 ceding. 



Ballston Springs. The springs at Ballston are mostly situated in the valley of the stream 

 which passes tlurough the village. The bed of this stream is slate, although it is by no means 

 certain that the carbonated waters have their origin in this rock. 



An interesting group of springs occurs in this village near the bathing house. Here we have 

 the United States Spring, which is acidulous ; at a distance of nineteen feet is the Fulton 

 Chalybeate Spring ; while in an opposite direction, and within twelve feet of the former, is 

 the Franklin Sulphur Spring. Thus there are three springs, differing considerably in their 

 composition, within a, few feet of each other. The United States Spring is highly charged 

 with carbonic acid gas, wliile the others contain only a small portion of it. The temperature 

 of this spring is 50° F ; and from all the information which we possess, it does not seem to 

 vary perceptibly during the year. The water has a specific gravity of 1.00611. The fol- 

 lowing is the composition of one pint, according to my analysis : 



