68

FREE CALORIC.

a solution and a mixture, by putting some com-mon salt into one glass of water, and some powder .of chalk into another; both these substances arewhite, but their effect on the water will be verydifferent.

CAROLINE.

Very different indeed ! The salt entirely disap-pears and leaves the water transparent, whilst thechalk changes it into an opake liquid like milk. j

1

EMILY. !

And would lumps of chalk and salt producesimilar effects on water f

MRS. b. |

Ves, but not so rapidly; salt is- indeed soon <melted though in a lump ; but chalk, which doesnot mix so rekdily with water, would require amuch greater length of time; I therefore prefer-red showing you the experiment with both sub-stances reduced to powder, which dees not in anyrespect alter their nature, but facilitates the ope-ration merely by presenting a greater quantity ofsurface to the water.

I must not forget to mention a very curiouscircumstance respecting solutions, which is, thata fluid is not increased in bulk by holding a bodyin solution.