262 Analysis of the Mineral Waters (Ocr. 
of the oxalate of ammonia on the muriate of lime, the heat was 
continued while any vapours were disengaged, and at the end was 
raised nearly to redness. The dry mass weighed, while warm, 25 
grains. Being dissolved in water, its solution was rendered very 
slightly turbid by the addition of muriate of barytes, showing the 
presence of a minute portion of sulphuric acid. A quantity of pre- 
cipitate was collected, which, when dried, weighed 0°8 grain. Sup- 
posing the sulphuric acid of this to have originally existed in the 
water; along with the other portion of this acid, in the state of sul- 
phate of lime, it gives a proportion of that sulphate of 0-5 grain, 
and of course increases the quantity of it from the 2°6 grains ob- 
tained by evaporation to 3°1 grains. An equivalent quantity must 
at the same time be subtracted from the proportion of muriate of 
lime, which may therefore be reduced to 18 grains. By evaporation 
of the liquor, muriate of soda was obtained, weighing, when it had 
been dried at a low red heat, 24°3 grains. Of this a small portion 
(0:4) would be formed by the muriate of barytes, which requires to 
be: deducted; but then the sulphuric acid which existed in the mass, 
could, after the action of the oxalate of ammonia, and the exposure 
to a red heat} exist in it only in the state of sulphate of soda, in the 
production of which an equivalent portion of muriate of soda would 
be decomposed. ‘lhe quantity of muriate of soda obtained, there- 
fore, by the evaporation, may be regarded as the just proportion 
indicated by the analysis. om 
The results, then, by this method, agree very nearly with those 
by the other; being of solid ingredients ia a pint of the water, 
Grains, 
Murtate‘ofisoda 090% 60h OE 0508 ARB 
Moriate of lime /......... BAe phe .. 18 
Sulphatdiof lime worse ss SEE SORE 
Carbonate of lime ....,..0cc.e0ce20- OD 
With a trace of iron. pS 
45:9 
With regard to both analyses, a small correction is to be made in 
the proportion of sulphate of lime. The mode of ascertaining it, 
by evaporation, being rather imperfect, I afterwards determined it 
by the more accurate method of precipitation by muriate of barytes:; 
applying this re-agent with a slight excess of acid, so as to prevent 
any precipitation of carbonate. ‘The quantity of precipitate thrown 
down from a pint of the water amounted, after drying at a low red 
heat, to 6°1 grains, equivalent to 3°5 grains of sulphate of lime. 
As the portion of.sulphate of lime thus obtained above that obtained 
by the evaporation would remain principally mixed with the muriate 
of soda, the quantity of that ingredient falls to be reduced a little, 
and may therefore be stated at 24 grains. he 
_ _ It remained to ascertain the proportion of iron. The quantity, 
however, was evidently so small as to present a difficulty. Succinate 
