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PROOFS OF THE PROPERTIES OF POTASH.

Experiment IV.

Potash has a strong affinity for sulphur.

When equal parts of potash and sulphur are triturated togetherin a glass mortar, the sulphur soon acquires a green colour, themass becomes pasty, its temperature is raised, and a sulphuretof potash is obtained.

Experiment V.

Potash and snow produce a great degree of cold.

When four parts of crystallized potash reduced to powder,and three of uncompressed snow, are hastily mingled together,the mixture becomes fluid, and an intense degree of cold is pro-duced, which under proper circumstances is — 51° Fahr.

Experiment VI.

Potash and dense acids produce a great degree of heat.

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If equal weights of potash freed from its water of crystalliza-tion by fusion, and dense sulphuric acid are mingled together,a great degree of heat will be instantly produced, and a flash oflight will be seen to pervade the mixture if the experiment bemade in the dark.