350 Analysis of the Mineral Waters - (Nov. 
its action on the muriate of lime. Real sulphate of lime and real 
sulphate of soda are very nearly equivalent to each other with regard 
to the proportions of their acid and base; so that the quantity of 
the one may nearly be substituted for that of the other ; 3°5 of sul- 
phate of lime being equal to 3°7 of sulphate of soda. But this 
sulphate of lime is formed at the expense of a portion of muriate 
of lime, and its formation is accompanied with the production of a 
little muriate of soda; hence the proportion of the former must be 
a little larger, and that of the latter a little smaller, than have been 
before stated. 3°5 grains ef sulphate of lime are equivalent to 2°8 
of muriate of lime, which quantity, therefore, is to be added to 
the proportion above assigned. The equivalent portion of muriate 
of soda to be subtracted is 3. ‘The whole proportion, therefore, will 
be the following :— 
Grains. 
Pi pwiate OF GORA 4x: bcalerp <i. avelaeve afd dere ae 
Murtate of ligne: do xitinscrond ere enads ogee 
Sulphate of soda .... o0:0s:a0;> be bieid sae 0 op OF 
Carbonate Of Hine). 4 cameo; nse dhe apep eee OD 
Oxide. Of 170N., 4.6.0.6 94s sted elee opade cme; Ode 
The quantity of sulphate of lime obtained in the analysis of the 
Pitcaithly water being so much smaller than that in the Dunblane, 
it may perhaps be considered as an original ingredient ; or if even 
the opposite view be adopted, the change in the proportions, as in- 
dicated by the analysis, is much less, “They may be stated as 
follows :— . 
‘ Grains, 
Winriate Of SOUS. ec ocr ac koe cee amar oun 
Muriate of lime ......... » elas heretejeteta RO a 
Sulphate of soda...... ce veeesdvsesus Ue 
Wanhonate Or Mile. hw se cee nla oe ee res eae 
The carbonate of lime contained in both waters may, it is ob- 
vious, according to the same view, be a product of the operation, 
and may exist in the water in the state of carbonate of soda. Yet 
the quantity is so small, and carbonate of lime is so generally dif- 
fused in the mineral kingdom, that it may perhaps be regarded as 
an original ingredient. On the other hand, it seems to be nearly 
insoluble in water, and this favours the supposition that it is a pro- 
duct of the analysis. It is unquestionably so in the mineral waters, 
in which it has been stated to exist in much larger quantity, and in 
which there is not, at the same time, any excess of carbonic acid, 
by which it might be retained dissolved. 
- The view of the constitution of this mineral water which I have 
now explained, suggested a method of analysis which I may state, 
both as it accords with, and in some measure confirms it, and illus+ 
