8 Geological Reports on the State of New York. 



" Bubbles of air continually rise through the crevices of the rock at the 

 bottom of this spring, which ascending rapidly through the water, occasion 

 an incessant agitation, and appear to break on the surface without being 

 at all absorbed by the water. This air is given out in the proportion of 

 about five cubic inches from a pint of the water, and it consists, according 

 to the experiments of Prof. Daubeny, of Oxford, now on a visit to this 

 country, who kindly furnished me with the results, of 89.4 parts of nitro- 

 gen, and 10.6 parts of oxygen, in the hundred. This is equal to nearly 

 fifty parts atmospheric air, and fifty parts pure nitrogen, in the hundred. 

 Prof Daubeny could not detect any carbonic acid in the gaseous matter 

 given out by this spring. 



" So large is the quantity of water at the Lebanon springs, that advan- 

 tage has been taken of it, and of the elevation of the ground, not only to 

 supply all the baths, but to turn two or three mills erected within a short 

 distance : these mills are kept in action during the severity of the winter." 



Acidulous or Carbonated Springs. 

 The well known springs of Saratoga and Ballston are the most 

 conspicuous of this class in the State. 



" Composition of a pint of the water from the Congress Spring. 



According to the late Prof. J. F. Dana. Grs. 



Chloride of sodium, - - - - - 54.3 



Carbonate of lime, 18-0 



Carbonate of magnesia, 4.0 



Carbonate of soda, ----- 2.0 



Silica, with a trace of iron, - - - - 



