ON THE SOLUBILITY OF SOME PRECIPITATES. 51 
III. Solubility of the Carbonate of Baryta, — I part of 
the recently precipitated salt dissolves in 14137 parts cold 
water, and 1542 parts boiling water. 
A solution of chemically pure chloride of barium was 
treated with an excess of ammonia and carbonate of ammo- 
nia, heated gently, and set aside for 12 hours. The filtered 
solution remained perfectly clear on the addition of sulphu- 
ric acid; after standing for a very long time a scarcely per- 
ceptible precipitate had separated. 84.82 grms. of the so- 
lution, evaporated in a small platinum dish and gently ignit- 
ed, left 0.0006 residue ; consequently 141000 parts of the 
liquid, containing ammonia and carbonate of ammonia, had 
dissolved 1 part of the salt. 
IV. Solubility of the Silico -fluoride of Barium. — 1 part 
of the salt was found to dissolve in 3802 parts cold water 
and 3392 parts water, after being boiled with it, and then 
allowed to cool. In cold water containing muriatic acid 
the relation is as 1 part to 733 ; but on being boiled and 
then allowed to cool, the relation is as 1 to 640. 
V. Solubility of Sulphate of Strontia. — In pure water 
at the ordinary temperature 1 part dissolves in 6895, and 
in 9638 parts of water at 212°. 
In water containing muriatic and sulphuric acid, 1 part 
requires 11862 parts. 
VI. Solubility of Carbonate of Strontia. — 1 part of the 
salt requires, according to the author, 18045 parts water 
for solution; and in water containing ammonia and carbo- 
nate of ammonia, 1 part requires 36545 parts for solution. 
When a solution of chloride of strontium is precipitated 
with carbonate of ammonia and ammonia, the filtered solu- 
tion is not rendered turbid on the addition of alcohol by 
sulphuric acid. 
VII. — Solubility of Carbonate of Lime in Water. — 1 
part of this salt dissolves in 8834 parts boiling water, and 
in 10601 parts cold water; and in water containing ammo- 
nia and carbonate of ammonia 1 part in 65246 parts. 
