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fe that it is rio wonder it fhould be difficult to exhibit 
a palpable fulphur, and that the diftinguifbing appear- 
ances proper to that mineral fhould often fail, parti- 
cularly the above-mentioned tefl by acids, and the 
burning blue. 
6 . That a real fulphur, or bituminofo-fulphureous 
fubftance, is diflblved in thefe waters, and fubfifts in 
fome of their lefs volatile or more fixed parts, is evi- 
dent from the following appearances in the mud and 
fcum collected from feveral of them : for the mud of 
feveral of the cold waters I have called fulphureous, 
as well as that of feveral hot baths in Germany and 
Hungary, mentioned by Browne in his Travels, is 
variegated with the feveral colours of yellow, green, 
and red, as the real fulphur, and, in fome experi- 
ments, burnt with a blue flame, and a fulphure- 
ous fmell ; and the like evidences may be given of 
the fulphureous quality of the fcum of divers of our 
cold waters, particularly in that of Meehan, in the 
north of Ireland, which, being dried, exhibited on 
the upper fide a whitifh yellow, or cream-colour ; 
but underneath a deep grafs-green, a pale, beautiful 
gold-colour, and a light reddifh pink-colour, inter- 
fperfed in a fubftance of a leaden black ifh colour ; 
every colour excellent in its kind, and as llippery as 
frogs fpawn : varieties of colours, like thefe, being 
alfo found in the preparation of lac fulphuris vari- 
oufly expofed to the air. But, to come to more direct 
proofs, we are affined, in Short’s firft volume of his 
Hiftory of mineral waters, as to the cold waters of 
Harrigate, that both the mud and fcum burnt with a 
blue flame, and fmeltftrong of fulphur 5 and that 
great quantities of yellow fublimed flowers of fulphur 
have 
