This is merely a solution of the _solid_ sub-carbonate in distilled
water, see _Ammoniæ Sub-carbonas_. DOSE, fʒss to fʒj in any bland
liquid. ADULTERATIONS. There is frequently a deficient quantity of the
sub-carbonate in solution, its pungency being kept up by the addition of
_liquor ammoniæ_; this may be discovered by shaking it with twice its
bulk of alcohol, when a coagulum of considerable density should occur,
the absence of which will denote the sophistication of the article. Its
_specific gravity_ should be 1·150. The _Incompatibles_ are those
enumerated under the history of _Ammoniæ Sub-carbonas_.