no

LATENT HEAT.

EMILY.

And can you show us any experiments in whichliquids, by being mixed, become solid, and disen-gage latent heat ?

MRS. B.

I could show you several; but you are not yetsufficiently advanced to understand them well. Ishall, however, try one which will afford you astriking instance of the fact. The fluid whichyou see in this phial consists of a quantity of acertain salt called muriat of lime, dissolved inwater. Now, if I pour into it a few drops of thisother fluid, called sulphuric acid, the whole, orvery nearly the whole, will be instantaneouslyconverted into a solid mass.

EMILY.

How white it turns! I feel the latent heat es-caping, for the bottle is warm, and the fluid ischanged to a solid white substance like chalk ?

CAROLINE.

This is indeed the most curious experiment wehave seen yet. But pray what is that white va-pour that ascends from the mixture?

MRS. B.

You are not yet enough of a chemist to under-