MEDICINAL WATERS 



more accurately the nature and qualities of this 

 earth, I tried fcvcnil experiments with it. I full 

 poured upon it cold dillilled water; and after the 

 water was fulllciently digeited with the earth, 

 and a fulllcient quantity of the foluble parts of 

 the latter fufpended in the former, poured it 

 through a drainer. The 1 lixiviate thus prepar- 

 ed continued pure, and fullered no change of co- 

 lour from the infulion of tincture of turnfolc. 



Tindlurc of galls mixed with fome of this lix< 

 iviate, both in its original Hate, and boiled, al- 

 furned a violet colour; but not readily, nor till af- 

 ter a conliderable time. The faccharine acid 

 produced no precipitate, and afolution of filver 

 fcarce any ; fulitcd ponderous earth rendered 

 the white powder by degrees turbid. Jlencc 

 then it appears that there is fome vitriol in the 

 earth ufed in the Lokurne baths; and that it 

 forms with water a lixivute very different from 

 pure fpring-water. This affords a certain proof 

 (if what was above-mentioned, that water ill'uei 

 out of fprings even in the depths of the earth; 

 and that this and the water on the fiirfacc of 

 earth have nothing common. 



$ v. Salubrious powers of tbe Lokarnc waters. 



To render the falutary efforts of this water 

 better underflow!, I lhall prefcnt my reader* 



with 



