268 Analysis of the Mineral Waters (Ocr. 
acid, produced a slight turbid appearance ; and even when in its 
purest state, a very slight opalescent hue was perhaps apparent; but 
this obviously depended on the presence of a little carbonic acid ; 
for when a drop or two of nitric acid was previously added, and the 
water heated, no such appearance was produced; or, if boiled 
strongly, without any addition of acid, on restoring the original 
quantity of liquid, by adding distilled water, the transparency was 
not in the slightest degree altered on adding pure ammonia. The 
slight precipitate, too, which did occur in any case was dissolved by 
the most minute quantity of muriatic acid with effervescence; and 
this solution became turbid on adding oxalate of ammonia, proving 
the precipitate to have been carbonate of lime. 
The same general conclusions, then, with regard to the nature of 
the ingredients, are to be drawn from the preceding results as from 
the application of the same tests to the Dunblane water. They 
suggest of course a similar mode of analysis. I preferred the 
second of the methods above described, as being the most simple 
and easy of execution. 
An English pint of the water was submitted to evaporation. Be- 
fore the matter became dry, numerous cubical crystals were formed, 
indicating the presence of muriate of soda; when dry, the solid 
matter entered readily into fusion with effervescence, denoting the 
predominance of muriate of lime. The dry matter was highly de- 
liquescent. After exposure to a heat inferior rather to redness, it 
weighed while warm 35 grains. , 
This dry matter was redissolved in about ten times its weight of 
distilled water. Asmall portion remained undissolved, which, being 
washed and dried, weighed 1:2 grain. A little diluted muriatic acid 
’ dropt upon this excited slight effervescence; but the greater part 
remained undissolved, and weighed, after washing and exsiccation, 
0:9 grain. It was sulphate of lime. A very thin crust adhered to 
the sides of the glass globe in which the last stage of the evaporation 
had been performed. . This was dissolved with effervescence by di- 
Juted muriatic acid, and the solution became quite turbid on adding 
oxalate of ammonia. The quantity of carbonate of lime thus indi- 
cated, adding the portion abstracted, as above, from the sulphate, 
canuot be estimated at more than 0°5 grain. These results were 
confirmed by precipitation from another portion of the water by 
muriate of barytes, the proportions indicated being nearly the 
same. 
The liquor poured off from the insoluble residue being diluted 
with distilled water, oxalate of ammonia was added to it as long as 
any turbid appearance was produced ; and after the subsidence of the 
precipitate the liquor was boiled a little, to render the decomposition 
and precipitation complete. ‘The clear liquor was then evaporated 
to dryness, and the dry mass was exposed to heat, to volatilize the 
muriate of ammonia, the product of the action of the oxalate af 
ammonia on the muriate-of lime ; the heat being continued as long 
ef 3 4 & J 90d of ; } 
3113 OF BITOU 
