Edwardsville spectator. [volume] (Edwardsville, Ill.) 1819-1826, 1821-11-13

pot, stirring il about with stick or piece
OF wood, to prevent its burning, which,
when it happens, greatly Injuries the
oil, AID gives it burnt smell and
taste, Or disposes it to become rancid in
a short time. When the oil is drawn
without the assistance OF heat, it is known
by the name of cold drawn oil, and is
more valuable, than when heat is used,
but it is not obtained in the same guam
tity. milder, and may DC kept longer
without spelling.
In cold season of the year, certain
degree Of heat is absolutely necessary.
But If the oil is designed for alimcnl or
,Hedicine, the plates of the press Should
be heated in boiling water only. When
the oil is intended for other uses, the
plates may be made hotter, as heat ex-
pedites the separation Of the oil, and gives
1t greater produce. but then care should
be taken not to injure The subject by
burning. Sometimes the subject, when
ground appears almost like dry pow
der. It's then said 10 be meayre, and
requires to he exposed TO The yapors Ct
boiling water, which is done either By
tying it up IN bag, or putting ii into a
sieve, ard placing it over the steam. By
this inpregnation, it will yield its on
mere readily, and in greater quantity
The ell may be easily freed from any
water, that may happento be pressed out
with it, as spontaneous separation be-
tween them will take place on standing
for some time.
For the encouragement of those who
may choose to improve tits subject, i,
may be proper to observe, that al! tho
oils, from whatever ye gc,ablc substances
they are drawn, when obtained by ex-
pression with due caution, agree III their
general qualities, and are constantly mid
even though they are obtained from very
acrid substances. Thus the expressed
oil Of mus,ard seed is, when fresh, as
mild as that Of olives. ADD the bitter al
mond, or peach kernel. affords an oil, by
expression, as mid as that Of swee, al
monds, II is upon this principle, thai;
the Sun-fowor oil may prove equally
valuable with the best Floreuce oil, FOL
diet or medicine. Tor every expressed
oil, when pure and fresh, is void OF acr-
mony, and free from any particular taste
or smell.
Besides the mild oil jus, mentioned,
some substances contain another kind OF
oil, called their essential oil, part Of
which may be drawn off, with TIE n,ill
expressed Gil, SO called, and impair, It's
smell or taste 10 that oil. il is-callad
essential oil, from It's yielding the psrti-
cuar odour Of The vegetable, or part CT
the plant, from which il was obtained !;
it is pungenl TO the taste, and soluble IN
spirits Of wine, which the other is not
They may, therefore, be easily dis IN
guished from each other. The OF! of
sweet almonds, and the oil Of Lives, be.
ing pure unctuous expressed ellis, not
soluble in spirits OF wine, butmild to the
taste, and void of oeour. very soft, emol-
lent, and lenitive, are chiefly used iii
medicine and diet. And the reason why
the oil Of olives, i'll particular, is pre-
fcrrcd, is because it is less expensive,
and will keep a much longer time with
out becoming rancid.
Perhaps, On trial, the Sun flower seeds
MAY be found TO contain an oil that will
answer the like good purposes with the
salad and medicinal oil now in use. IL
so, it will have this advantage over tina,
Of almonds or olives, that ii is native oil
the country, may be always had fresh
and at small expense. Whereas the
Others are the produce Of distant coan-
tries, bear high price, and are often
adulicratesl on that account; or, being
kept long time, they lose their mild
qualify, and become rancid and aCri-
monious. ~
The practicableness of getting OF!
among ourselves at a moderate expense,
and the importance OF using it fresh, to-
gether with the probable uses of Sur
flower oil for varnisiles, FOR the basis Of
oiutmcnts, and for mixing OF paints, as
well as other purposes to be answered by
oils in general, claim our attention to
this subject, and encourage further trials
of the like kind.