430 
On Mineral Waters* 
A week after the preceding analysis, during which interval the 
weather had been fine and warm at the latter end of July and be- 
ginning of August, I received more water from the York springs. 
I evaporated carefully 21b avoirdupois. I collected 14 grains of 
saline matter. It was dried, triturated, dissolved in alcohol, and 
the residue in hot water. The last watery solution, left a residuum 
of six grains, which was fully dried over a lamp, and proved to 
be sulphat of lime. To be quite sure of this, it was decomposed 
by double its weight of carbonat of potash. The sulphat of potash 
washed away, left the carbonat of lime perfectly soluble in dilute 
muriatic acid except about the^th of a grain of siliceous sand. 
The water in which the sulphats were dissolved, had taken up 
a small portion of the sulphat of lime, which oxalat of ammonia 
detected, amounting to about | a grain, there being one grain of 
oxalat of lime. The sulphuric acid was combined with potash 
as the crystals shewed : it was precipitated with barytes ; and 
produced two grains of sulphat of barytes, dried over a lamp. 
The alcoholic solution of the muriats furnished me with lj grain 
of muriat of silver, a grain of alumina, and about 1^ grain of car- 
bonat of magnesia. As an accident happened to part of the filter- 
ing paper, on which this was dried, there may be an error of half a 
grain here, but I believe there is not an error to half that amount. 
Hence the sulphur spring, 5 miles from Carlisle, contains in one 
pint by measure or lib by weight, about J its bulk of the gas call- 
ed sulphuretted hydrogen. It contains also one grain of pure pot- 
ash united to sulphur, and as much pure lime, also combined with 
sulphur. 
The sulphur spring, in York county, 17 miles from Carlisle, con- 
tains probably about as much sulphuretted hydrogen as the spring 
near Carlisle ; but as the gas will not bear transportation, I have 
not the means of accuracy in this respect. 
The York spring also contains in one pint by measure, or lib. 
by weight, according to the first experiment 5 grains of dried sa- 
line matter : yielding 2 grains of sulphat of lime, 3 J grains sulphat 
of magnesia, about J a grain of muriat of magnesia, and one grain 
of sulphat of potash. The excess above the five grains in this cal- 
culation, will arise from the greater quantity of water of crystal- 
lization in these salts in their common state, than in the dry state, in 
which I procured them. Thus, one grain of carbonat of magnesia 
is equal to ,65 of a grain of pure magnesia, which would make 
