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of the artificial folution of fulphur, and its va- 
pours. 
3 . Many of thefe waters, both foreign and domef- 
tic, are found to contain the native alcaline fait, which 
is the proper mendruum for, and has the fame effed 
in, diffolving fulphur, as the artificial alcali ; viz. not 
only the hot waters^if Aix la Chapelle and Borfel, but 
the cold of Geronderre ; and, in England, thofe of 
Chadlington, Nottington, Bilton, Quincamel, Sutton - 
bog, and Wigglefworth j and the following in Ire- 
land, viz. thofe of Stoadlingbar, Derryleder, Lif- 
blenk, Afhwood, Derryherce, Anaduff, Aghaloo > 
and one lately difcovered at Lucan near Dublin. 
4. Accordingly a milkinefs, or incipient precipita- 
tion, analogous to lac fulphuris, is produced in feve- 
ral of thefe waters, by dropping acids into them ; par- 
ticularly in thofe of Aix la Chapelle, even according to 
Dr. Lucas's own tedimony of the effeds of diddled 
vinegar on it, and in that of Moffat in Scotland ; of 
Harrigate; in our Swadlingbar water, and another of 
our fprings of this fort in the C. Fermanagh : and 
to this add the white hairy mucus ordinarily precipi- 
tated on the flicks, or grafs, in the paffage of thefe 
waters, analogous to a magideryof fulphur. 
f. The fulphur in waters is in a mod highly atte- 
nuated, fubtile, and fugitive, date; infomuch that, as 
Dr. Lucas obferves of thofe of Aix la Chapelle, there 
is a great alteration in the colour of the precipitate 
caufed by folution of filver in that, which hath been 
immediately drawn from the fource, and that which 
has lain by only twenty feconds, even in a bottle 
filled, and clofe dopt ; fo foon is it lod or difiipated : 
and moreover, it is alfo blended with other minerals ; 
fo 
