PROOFS OF THE PROPERTIES OF BARYTE3,

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Experiment III.

Barytes changes yellow vegetable colours brown >

Let paper, stained yellow with an infusion of turmeric, be dip-ped into a solution of barytes, it will soon lose its yellow colourand become brown.

Experiment IV.

Barytes renders oils miscible with water.

If one part of oil of olives be put into a phial and agitatedtogether with three of a concentrated solution of barytes, a sa-ponaceous mass will be obtained diffusible in water.

Experiment V.

Barytes gives out heat on being united to water.

If fresh-prepared barytes be sprinkled with water it graduallyswells up and bursts, it solidifies the water, and becomes consider-ably heated. If a little more water be gradually,added it hardenswith it; and, if left for some time undisturbed, becomes so hardthat it forms a kind of cement: a still larger addition of thisfluid changes it into a white powder exceedingly voluminous,and soluble in water.

Experiment VI.

Barytes forms glass with silex.

Put a few grains of silex and double the quantity of barytes ona piece of charcoal, urge it well with heat by means of the blow-pipe. The mixture will melt and a globule of glass will be ob-tained.

Vol. II.

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