260 Analysis of the Mineral Waters {Ocr. 
greater part was dissolved. ‘The portion which remained undis- 
solved, after being washed with small quantities of distilled water, 
and dried, weighed 2°4 grains. To this matter a little diluted nitric 
acid being added, a slight effervescence was excited: a thin crust, 
too, adhered to the sides of the small glass globe in which the last 
stage of the evaporation had been performed, which was dissolved 
with effervescence by a weak acid. ‘The quantity of carbonate of 
ime thus indicated may be estimated at 0°5 grain. ‘The remainder 
of the undissolved residue being washed and dried, was heated with 
two or three drops of sulphuric acid, and was thus rendered soluble 
in water. When neutralized by ammonia, the solution became 
milky ;. but its transparency was restored by adding more water ; it 
became quite turbid on adding oxalate of potash, and a precipitate 
was thrown down by alcohol. It was therefore sulphate of lime. 
Its quantity may be stated at tsvo grains. 
The solution had a taste purely saline. The test of oxalate of 
ammonia, however, showed the presence in it of a small quantity 
of lime ; the addition of the oxalate was therefore continued as long 
as any precipitation took place, and the precipitate was collected 
and dried. It weighed 1°3 grain. This production of oxalate of 
lime evidently arose from the presence of a small portion of muriate 
of lime, which, notwithstanding the precautions that had been em- 
ployed, had adhered to the muriate of soda. Supposing that this 
had not escaped the action of the alcohol, but had been dissolved 
by it, and in the subsequent stage of the experiment, been con- 
verted into sulphate of lime, it would have increased the quantity 
of this sulphate about 1*2 grain, making it therefore 21°7, equiva- 
lent to 17°6 grains of dry murzate of lime, which the pint of water 
contains. 
The solution contained also a minute quantity of sulphuric acid; 
for after removing any slight excess of oxalic acid that might have 
been present, it still gave a precipitate on the addition of muriate 
of barytes. Supposing this, as well as the rest of the sulphuric acid, 
to have existed in the water in the state of sulphate of lime, it will 
increase the quantity of that ingredient (calculating from the weight 
of the precipitate of sulphate of barytes obtained), from the two 
grains formerly noticed to 2°9. . 
~ "There appeared now to remain nothing but pure muriate of soda. 
The solution by slow evaporation afforded that salt in cubical crys- 
tals, which, dried at a low red heat, weighed 24:5 grains. Allowing 
0-8 of this as the portion of product formed by the action of the 
muriate of barytes, it leaves 23-7 grains. And if to this be added 
one grain, as the equivalent of the small portion of sulphate of 
soda, already noticed as formed by the action of the sulphuric acid 
on the muriate of soda adhering to the muriate of lime after the 
operation of the alcohol, it gives the quantity of muriate of soda at 
24-7 grains. 
- From these results, the solid ingredients in a pint of this water 
appear to be, 
