‘\ 
358 Analysis of the Mineral Waters [Nor. 
The only remaining differences would then be the presence of about 
2:8 grains of muriate of soda in each pint of the reduced Dunblane 
water, the deficiescy of 5°5 grains of sulphate and (7 grain of 
carbonate of lime, and the absence of 0°2 grain of siliceous earth, 
differences ip all respects probably of no importance whatever. The 
simple expedient, indeed, of diluting one part of the Dunblane 
water with from six to seven parts of warm water (or if the sulphate 
of lime in a state of solution should be supposed to be possessed of 
any active power, with four or five parts) and adding, if the chaly- 
beate impregnation were not found sufficient!y active, a few drops 
of tincture of muriate of iron, would probably serve every purpose. 
And if sufficient confidence could be given to the substitution on 
the part of those employing these waters medicinally, the Dunblane 
water, thus altered, might probably be taken with as much advan- 
tage as the Bath water in the diseases in which it has been found 
useful. . 
It is obvious, too, that if the artificial preparation of the Bath. 
water were attempted, it could be done much more easily aceording 
to. this view than by endeavouring to dissolve the actual products of 
its analysis, which indeed it would be impracticable to do. Muriate 
of lime and sulphate of soda dissolved im water of the due tempera- 
ture, with the addition of a minute portion of muriate of iron, 
would probably afford a composition approaching as nearly to the 
natural composition, as is either practicable or necessary in the imi- 
tation of any mineral water. 
A similar view may be taken of the composition of Cheltenham 
water. Its analysis affords sulphate of seda, sulphate of magnesia, 
and sulphate of lime, with muriate of soda, muriate of magnesia, 
carbonate of magnesia, and oxide of iron. ‘There is no just reason, 
however, to infer with certainty that all these are its reab ingre- 
dients, It is as probable, and indeed more so, that previous to the 
evaporation by which, they are obtained it contains muriate of lime, 
which. being acted on by the sulphate of soda forms mariate of soda 
and sulphate of lime. It is even not improbable that the carbonate 
naturally existing in the water is not carbonate of magnesia, but 
carbonate of soda, which re-acting, from the cencentration by the 
evaporation, on sulphate or muriate of magnesia, causes the pro- 
duction of the carbonate of magnesia with a corresponding portion: 
of sulphate or muriate of soda; or what is equally probable, and 
presents the same ultimate results, *the sulphate of magnesia may 
in the progress of the evaporation be first ucted on by the earbonate 
of soda, forming carbonate of magnesia and sulphate of soda; and 
the sulphate of soda, during the further concentration, may act on, 
the muriate of lime, and form muriate of soda and su)phate of lime. 
It is much more probable, indeed, from the known insolubility of 
carbonate of magnesia, that it is produced in this way, thaw that it 
should exist in a state of svlution in so large a quantity as: that in, 
which it is afforded by the evaporation. And thus this water will 
present a striking example dhat the real ingredients of a mineral 
