It is very curious, indeed, that carbonic acid gas should render lime soluble in one instance, and insoluble in the other!
MRS. B.
I have here a bottle of Seltzer water, which, you know, is strongly impregnated with carbonic acid:—let us pour a little of it into a glass of lime-water. You see that it immediately forms a precipitation of carbonat of lime?
EMILY.
Yes, a white cloud appears.
MRS. B.
I shall now pour an additional quantity of the Seltzer water into the lime-water—
EMILY.
How singular! The cloud is re-dissolved, and the liquid is again transparent.
MRS. B.