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low; and of Crofs and Cofhmnore, in the county of 
Waterford, and fome others: and, to conclude, as 
cryflals of martial vitriol have been demondrated in 
feveral of them, I fhall not hefitate to pronounce them 
acid vitriolic waters ; which waters, as they are new 
in practice, and different in operation and effects from 
the common chaiybeates, I apprehend it will be worth 
while to endeavour to place them in a more conlpi- 
cuous point of view, which the hidories lately given 
of the Britifh waters of this clafs above-mentioned, 
compared to our own, will enable us, in fome mea- 
fure, to do. 
There are, indeed, in thefe waters different de- 
grees of acrimony ; for tho’ mod: of them are fo acid 
as to curdle milk, yet this is not altogether univerfal ; 
and tho’ in many of them the acid is fo far developed 
-in their lolid contents, as to ferment with alcali’s, this 
appearance is not always confpicuous ; from whence 
one would imagine, that the milder fort might be 
ufed with more freedom, or lefs danger : .and yet it 
is certain, that one of the diarped of them all, viz. 
ours at Kilbrew, in the county of Meath, hath been 
taken inwardly, with amazing fuccefs, in fome very 
ftubborn cafes. 
Yet, on the other hand, it hath been obferved, 
that even the German fpaw fometimes hath proved 
too irritating in fome tender confutations, where our 
ordinary milder chaiybeates have lucceeded well ; and 
we are otherwife informed, by an accurate obferver, 
that, in fome tabid cafes, particularly that called the 
galloping confumption, the milded and lighted; of our 
own chaiybeates, and even altho’ blended with milk, 
have 
