Remarkab Le Observation Upon The Melting Of Salt Armoniac And Calx Vive Together

Take salt armoniac and calx vive, of each a like quantity, and mix and melt them together. Note that calx of itself will not melt in less than eight hours with the strongest fire that can be made, but being mixed with this salt melts in half an hour and less like a metal with an indifferent fire. This mixture being thus melted becomes a hard stone, out of which you may strike fire as out of a flint which, if you dissolve again in water, you shall have the salt armoniac in the same quantity as before, but fixed.

Note that hard things have their congelation from salt armoniac, as horns, bones, and such like, for little fixed salt can be extracted from them, only volatile and armoniac.

An ounce of any of these volatile salts (as of horns, bones, amber, and such like) reduced into an acid liquor by distillation, condenses and endures a pound of oily matter.

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