TEST. — Free from color, entirely volatilized by heat; no precipitate is caused by Nitrate of Baryta; solution of Nitrate of Silver
produces a precipitate entirely soluble in boiling Nitnc Acid. Litmus is feeblj reddened by it, but not permanently. It is
not reddened by lodocyanide of Potassium and Mercury. Hydrosulphuric Acid does not colour it.
LOHBOV.
SDmUXOH.
DUBLDI.
ACIDUM NITRICUM PURUM.
In the Mat Med.
Acid prepared from Nitrate of
Potash.
(No process given.)



100 grains of this Acid are
saturated by 161 grains of
Crystallized Carbonate of
Soda.
8p. Gr. 1-42.
Contains 60*0 per cent of dry
Add,



Put into a class retort equal
weights of pure Nitrate of
Potash and Sulphuric Acid,
and distil with a moderate
heat from a sand bath into
a cool receiver as long as
the fused material continues
to five off vapour : the pale
yellow Acid thus obtained,
gently heated in a retort,
• becomes colourless.
Sp. Gr. 1-50.
Ckmtains 79*7 per cent, of dry
Acid,



AVOimDUPOIS WSIOHT.
Nitrate of Potash - - 21bs.
Nitrate of Silver - 5 u or q. s.
Boiling Distilled Water 5 pts.
Oil of Vitriol of Commerce,
fl. 17oz.
Dissolve the Titrate of Silver
in 2oz. and the Nitrate of
Potash in the remainder of
the water, add by degrees
the former solution to the
latter until a precipitate
ceases to form. Tlie filtered
liquid is now evaporated to
drpess, placed in a retort,
and the Oil of Vitriol poured
upon it; the heat la now
raised to liquify the con-
tents and to distil over the
Acid.
Sp. Gr. 1-60.
