PROOFS OP THE PROPERTIES OF SILVER.

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and finishing with the silver; cover the crucible, place it amongburning coals and bring it to a red heat as speedily as possible.The two substances will thus be combined, and the result is amass of a dark violet colour, much more fusible than silver,brittle and disposed in needles. This is sulphuret of silver.

Experiment III.

Silver enters into combination with sulphuret of potash in thedry way.

Fuse together, in a crucible, one part of silver and four ofsulphuret of potash; stir the mixture frequently and when itis well fused, pour it on a smooth stone, which has been rubbedwith a little grease."

This compound is soluble in water and the combination of thesilver with the sulphuret is so intimate that it will pass throughbibulous paper.

Experiment IV.

Silver unites to mercury with great facility.

Triturate in a marble mortar, one part of silver leaf and sevenof mercury; the product will be an alloy which has but little con-sistence.

A similar combination may be effected by using silver filings jbut in that case the trituration must be made in a warm mortar.

-Remarks. ..This amalgam assumes a regular form by fusion andcooling slowly.

The mercury acquires a degree of fixity in this sort of combi-nation ; for it requires a much greater heat to separate it fromthe silver, than is necessary to volatilize it alone,

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