3. (Ph. E.) From the rasped wood, as EXTRACT OF BISTORT--P. Cod. Bitter
and stomachic.--_Dose_, 5 to 10 gr., or more.
_Obs._ This extract is almost universally prepared by coction, and is
principally consumed by the brewers, who employ it as a substitute for
hops, in large quantities. The bark is frequently substituted for the
wood, but is considerably less bitter. The Ph. Baden has an extract
prepared with spirit of ·944.
=Extract of Quince Seeds.= _Syn._ EXTRACTUM CYDONIÆ, E. C. SEMINUM.
_Prep._ From the decoction. Sucked as a lozenge, in hoarseness, &c.
=Extract of Ragwort.= _Syn._ EXTRACTUM JACOB[OE]Æ. The inspissated juice
of rag-wort.
=Extract of Rha'tany.= _Syn._ EXTRACTUM RHATANIÆ; E. KRAMERIÆ (B. P.), L.
_Prep._ 1. (B. P.) Rhatany in coarse powder, 1; cold distilled water, 15;
macerate 24 hours in 2 of the water, then percolate the whole; evaporate
by water bath to dryness.--_Dose_, 5 to 20 grains.
2. (Ph. E. Baden and U. S.) From dried rhatany root (_Krameria
triandria_), as EXTRACT OF BISTORT--P. Cod.
3. (Ph. Bor.) By two successive macerations in boiling water of 24 hours
each, and evaporating at a temperature not exceeding 165° Fahr.
_Obs._ Extract of rhatany is astringent and tonic.--_Dose_, 10 to 20 gr. A
large quantity of this extract, of very inferior quality, is imported from
Brazil, and other parts of South America. It is kept in two states, hard
and soft; the former resembles KINO, and is often sold for it; the latter
is chiefly consumed by the manufacturers and 'improvers' of port wine.
=Extract of Rhu'barb.= _Syn._ EXTRACTUM RHEI (B. P.), L. _Prep._ 1. (B.
P.) Rhubarb (sliced or bruised), 8 oz.; rectified spirit, 5 oz.; distilled
water, 50 oz.; macerate 4 days, strain, and set it aside, that the fæces
may subside; next decant the clear portion, strain, mix, and evaporate to
a proper consistence over a water bath at 160° F.
2. (Ph. L.) As EXTRACT OF CINCHONA--Ph. L. (nearly). "The extract is
obtained of finer quality by evaporation in a vacuum with a gentle heat."
The Baden formula is similar.
_Obs._ This extract is usually prepared by decoction from inferior and
damaged rhubarb, picked out from the chests on purpose; hence the inferior
quality of the extract of the shops. When made of good Turkey, or even
East India rhubarb, it is a very valuable preparation.--_Dose._ As a
stomachic, 5 to 10 gr.; as a purgative, 10 gr. to 1/2 dr. It is seldom
exhibited alone. _Product._ 5%.
3. (Fluid; LIQUOR OF RHUBARB, ESSENCE OF R.; LIQUOR RHEI, EXTRACTUM RHEI
FLUIDUM, L.)--_a._ (W. Procter.) Rhubarb (in coarse powder), 8 oz.; mix it
with an equal bulk of coarse sand, and moisten it with dilute alcohol (sp.
gr. ·935, = 13 u. p.) to form a pasty mass; in a short time introduce it
into a percolator, shake it until uniformly settled, and cover it with
cloth or paper; then pour on the rest of the spirit (the remainder of 2
pints) until the product has little odour or taste of the root; next
gently evaporate the tincture to 5-1/2 fl. oz., and add sugar, 5 oz., when
the whole should measure 8 fl. oz.--_Dose_, 15 to 30 drops.
_b._ (Ph. U. S.) As the last, adding of oils of fennel and anise, of each
4 drops; (dissolved in) tincture of ginger, 4 fl. dr.
4. (Compound; EXTRACTUM RHEI COMPOSITUM, E. PANCHYMAGOGUM, L.--Ph. Bor.)
Extract of rhubarb, 3 dr.; extract of aloes, 1 dr. (softened with) water,
4 dr.; mix, and add of soap of jalap, 1 dr. (dissolved in) proof spirit, 4
dr.; lastly, evaporate to an extract, dry this in a warm place, and
powder. Stomachic and purgative.--_Dose_, 4 to 20 gr.
=Extract of Rue.= _Syn._ EXTRACTUM RUTÆ, E. FOLIORUM RUTÆ, L. _Prep._ 1.
From rue leaves (_Rutæ graveolens_), as EXTRACT OF HOPS--Ph. L.
2. (Alcoholic--P. Cod.) As ALCOHOLIC EXTRACT OF ACONITE--P. Cod. (nearly.)
The formula of the Ph. Wert. is similar.
_Obs._ This extract is stomachic, carminative and emmenagogue.--_Dose_, 10
to 20 gr., twice a day. It is usual to add a little of the essential oil
to the extract, just before taking it out of the evaporating-pan, and when
nearly cold. The first is the form adopted in trade in this country.
=Extract of Saf'fron.= _Syn._ POLYCHROITE, EXTRACTUM CROCI, L. _Prep._ 1.
From hay saffron, as EXTRACT OF COLOCYNTH--Ph. L.