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Hydrated peroxide of Iron.
[Recipe]. Sulph. Ferri. [4 ounces].
Sulph Acid. f. [3 and a half drams].
Nitric Acid. f. [6 drams]. or q.s.
Sol. Ammonia q.s.
Aqua. Oii. disolve [sic]
the Sulph. Ferri in water, add the
the [sic] Sulph. Acid, & boil the
solut. Then add the Nit. Acid
in small portions boiling the
liquid for a minute after each
addition, until the acid ceases
to produce a dark color. Filter
the liquid, allow it to cool, and
add Sol. Ammo. in excess, stir-
ring the mixture briskly; wash
the precipitate with water