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| This was in the laft Difpenfaßöry called Sal voia-Ulis Salis ammoniaci. Theprocefs requires a ftrong?fire; for, the chalk muft receive fome degree ofcalcination before it will a£t on the Sal ammo-niac, though hr is not reduced to perfekt lime j (for,with lime, no folid falt can be obtained.) P.

Though chalk does not a£t upon Sal ammc*-hiae tili a confiderable heat is applied, it m«ft notbe too great nor too fuddenly raifed ; for, if it is>a part of the chalk (though of itfelf not capablcof being elevated by any degree ofheat) willbecar-ried up along with the volatile falt- Du Hamel(Mem. Acad. Sc.) could not feparate the chalk,thus volatilifed, by the gentieft re-fublimation; itdiflblved with the volarile Alkali in water, and ex-haled with it in the air. L.

AQUA AMMONXffi PURjE,

Water of pure Ammonia.

Take of Sal ammoniac one pound.Lime two pounds.Water one gallon.

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