Edgefield advertiser. [volume] (Edgefield, S.C.) 1836-current, 1846-03-25
ANOTHER DISCOVERY

Ne~ process Of Z anning.-A new dis.
sovery in the art of tanning has bean
made by DR.. TvrnnulI, Of London'
which is said in French paper, to e..
clipse every thing that has been discover-
ed in the practical arts for these hundred
years. The process, it seems, has been
carried on in London on a large scple
and has recently been introduced into
Paris. and been performed there in t,ie
presence Of the best tanners. A cnmr,u-
nicaion ON the subject has been present
ed 20 the French Academy of Arls and
Sciences b -relaiea- ha.iA--,.-i.,.44-
Dr. Iurnhull's practicable Applicul.on
of the Theory Of Endosmosis aud Ex,o-
mosi!s to,he Process of Tanning, and al
80 the Application of the SOLUBLE prin.
cipies oi Sugar to the same prrpose"-
We give from foreign journal. sbor,
exp anation Of what il mraur by endos.
moSls and exton,osis. When a nam.
brane in,ervenes between two rouids of
different densIles, they produce Il cur
reuls, The one outward called exron osis
aud the one inwarJs called endo,mo.is
By this new physical law The currents in
terrhanse unIIl they become Of The same
specific gIaviry; thus DR.. TurubuIl. bv
sewing hide filled with one iuu,r If :.
certain specific. gravity. and ,hen INNER
sing he bide in another liquid of great.
er or lesser density, Keeps up this rpcin-
rocai actinn until such lime as the hide
Is thoroughly Iauned. BY he ordinary
process Of tanning ii requires eighteen
months TO tan an OK hide, aud 400 pounds
of bark. Or. Turnbuli tans the hide in
fourteen days, and with only 100 pounds
OF bark. Eere, 'hen, is sav.ng of out
lay for the process, and The tanner with
the same amount of capital. can do thirty
SIX tunes as much rs under The old sIs-
TEN. And this is not all. DR. Turnbult's
process gives an extra weight of leatbar.
varying from Is t" % pound per cent
Calves skins. which under the old pro-
cess require AN immersion in The va of
hve, SIX aud seven months. are by DR..
TurnbuIl's process tanned ia two Gays.
This rapidity of execution is by no means
attended with iuI: riorty of the leather
produced. On The contrary, it is said rs
become much better, all Ihe sarnra,iou re-
CURED for The production of good leather,
being as FULLY effected by the new as the
old process.
The first part of the ordinary mode of
tanning is TO remove the hair from the
skin-to do this lime is used, and before
the hair can be detached. the corrosive
action of the lime always produces an in.
jury TO the skin. rendering ii sponsy, and
therefore readily susceptible of moisture
when The leather is made up for use, a, the!
same time that The interests of the tanner
are ELECTED by the loss of weight. DR..
Turnbull effects the removal OF The hair
by the use OF sugar or any substance con-
tanning saccharine matter; or, if lime be
used, 1t is removed by the application of
sugar, before II can do any injury, whereas
by the cid process, portion OF it must
forever remain in the skin. Hitherto ev-
cry process for rapidly in tanning, has
been attended with loss ofquali'y. for the
process was expedited by the use of acids.
by the new process NOT only are no acids
used, lu addition 10 The usual tanning ma .
terials. but even the portion Of acid whicI,
those materials contain is Destroyed. The
best tanners Of Paris have certified tn the
reality and great benefit Of this discovery
after seeing the operation performed mn
der their own eyes, and commission
from the Academy has been chosen TO
report OIL these remarkable useful expe.
rimen,s.