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Dr. Tenney's Accoiuit of Several Medicinal Springs. 51 



From the experiments made on 'the water of the upper 

 well, particularly from the firsf^ it appears to contain a 

 large quantity of calcareous earth; and from the same ex- 

 periments, especially the second and third, it is probable, that 

 this earth is suspended in the water by means ' of fixed air. 

 From the ferruginous film with which these waters are of- 

 ten covered, it seems that they must contain some ironj 

 though the proportion was so small, as not^ to bo observed 

 in the experiments which I madej but from the fifth expe- 

 riment it is obvious, that the spring there mentioned is a 



strong chalybeate. 



It is obvious that these waters are essentially the same 

 with the acidula3 of Pyrmont, Seltzer, &c. which have so 

 long been famous in Europe. The chemical analysis of 

 those waters, and the experiments relative to the solubility 

 of martial and calcareous earths in water, by the interven- 

 tion of fixed air, made by Doctor Brownrigg and others, are 

 so well known, it is unnecessary for me to give a particular 

 explanation of the causes of the phenomena observed in the 



preceding experiments. 



Notwithstanding these waters appear, by their chemical 

 analysis, to be similar to the acidulous waters of Europe, 

 they are probably much superiour to them in their medici- 

 nal virtue. That they are much more strongly impregnated, 

 particularly with fixed air, is evident. The large quantity 

 of calcareous substances found in these waters, must satu- 



■ 



rate much of it; yet so much of it remains unsaturated, as 

 to give such a pungency to the water, that a quantity of 

 it held in the mouth for a few seconds, burns it like ardent 



spirits. 



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