ifb Bifkop of Land aft's Obfervaiions on 
cloud may be feen {lowly precipitating itfelf to the bottom; 
This white precipitate con lifts partly, I am not certain that it 
eoiififts wholly, of fulphur; and the fulphur is as really con- 
tained in the waters denominated fulphureous, as iron is con- 
tained in certain forts of chalybeate waters ; in the one cafe 
the iron is rendered foluble in water by its being united to 
fixed air, or fome other volatile principle; and in the other 
fulphur is rendered foluble in water by its being united to fixed 
air, or fome other volatile principle: neither iron nor fulphur 
are of themfelves foluble in water, but each of them, being 
reduced into the form of a fait by an union with fome other 
fubftances, becomes foluble in water, and remains diffolved 
in it, till that other fubftance either efcapes into the air, or 
becomes combined with fome other body. 
About forty years ago, they took up the bafon of the third 
well, and a credible perfon, who was himfelf prefent at the 
operation, informed me, that in all the crevices of the ftone 
on which the bafon refted, there were layers of pure yellow 
fulphur. This I can well believe, for I ordered a piece of {hale 
to be broken off from the bottom of the fourth well ; it was 
fplit, as fliale generally is, into feveral thin pieces, and was 
covered with a whitifh cruft. Being laid on a hot iron, in a 
dark room, it cracked very much, and exhibited a blue flame 
and fulphureous fmell. 
If the water happens to ftand a few days in any of the 
wells, without being difturbed, there is found at the bottom a 
black fediment ; this black fediment alfo marks the courfe of 
the water which flows from the well, and it may be efteemed 
charadleriftic of a fulphur water. The furface of the water 
alfo, when it is not ftirred for fome time, is covered with a 
whitifh fcum. Doftor Short had long ago obferved, that 
both 
