Granulated Sulphate of Iron,
any convenient quantity ; ex-
pose the salt in a porcelain
capsule to an oven heat not
exceeding 400°, until aqueous
vapours cease to be given
ofi^ and having then reduced
it to a fine powder, preserve
it in a well- stopped bottle.
Three grains of this are about equal to 5 grains of the green Sulphate ; and piUs made with this instead of flie green Sulphate

will retain their shape better.
60



Expose any convenient quan-
tity of Sulphate of Iron to
a moderate heat in a porce-
lain or earthenware vessel
not glazed with lead, till it
is converted into a dir grey-
ish white mass, which is to
be reduced to powder.
LOKDON.
Ai}9



nntoH.
BUBLDT.
FERRI SULPHAS CRANULATU

Not in Pliarm. Not in Phann.
Not in Pharm.
FERRI SULPHURETU

The best Sulphuret of Iron is
made by heating an iron rod
to a full white heat in a
forge, and rubbing it with a
roll of Sulphur over a deep
vessel fillea with water, to
receive the fused globules of
Sulphuret which form. An
inferior sort, good enough,
however, for I^harmaceutic
purposes, is obtained by heat-
ing one part of sublimed
Siuphur and three of Iron
filings in a crucible in a
common fire till the mixture
begins to glow, and then
removing me crucible and
covering it, until the action,
which at first increases con-
siderably, shall come to an
end.
▲VOIBDUPOIS WSiaHT.
