The Evansville journal. (Evansville, Ind.) 1834-184?, 1846-04-02
ANOTHER DISCOVERY.

New PROCESS OF TANNING.--A new dis
covery in the art of tanning has been made
by DR.. TurnbulI, of London, which is
said in French paper, 10 eclipse everything
that has been discovered in the the prac-
tcal artist for these hundred years. The
process, il seems, has been carried on lately
in London on a large scale, and has recently
been introduced into Paris, and been been
performed there in presence of the best tan
ners. A communication on the subject has
been presented 10 the French Academy OF
arts and sciences which relates TO what is /
styled ''Dr. Turnbul's practical Application
of the Theory of Endesmoss and Exosmosis
to the Process of Tanning, and also the APP
pcation of the Soluble principles of Sugar
to the same purpose =
We give, from foreign journal, short
explanation of what is meant by en0osmosis
and extosmosis. When a membrane inter
venes between two liquids of different den
stiles, they produce two currents. the one
outward called exiomosIs, and the one IN
wards called endosmosis. BY this new ply
seal law the currents interchange until they
become of the same specific gravity; thus
DIR. Turnbull, by sewing a hide filled with
one liquid OF a certain specific gravity, and
: then immensng The hide in another liquid OF
5 greater or lesser density, keeps up this re-
ciprocal action, until such time as The hide is
thoroughly tanned. By the ordinary pro-
l.
TO tan an OK hide, and 400 pounds OF bark
DR.. Turnball tans The hide in Ia days, and
E with only 100 pounds of bark. Here, then.
d is saving OF outlay for the process, and the
), tanner, with the same amount of capital, can
dc thlriy-six times as much as under the old
l. system. And this not all. DR.. Turnbull's
process gives an extra weight ofIeather, vary
d ing from Is TO % pound per cent. Calves
,fI skins which under The old process require an
o immersion in the Vat of five, six and seven
d months, are by Dr.. TurnbaIl's process tanned
\. in two days. This rapidly of The execution
>, is by no means attended with inferiority tt
4 The leather produced On the contrary,.i
K is said to become much better, all the satu
r. ration required for the production of gooC
o. leather, being as fully effected by the new a
Olu piOCCSS. tlO pau VI ttiO Oi0iudil
lie mode obtaining is 10 remove the hair from
We the skin-to do this lime is used, and befort
We the hair can be detached, the corrosive &C
On ton of the lime always prodaces an injury t.
the skin, rendering III spongy, and therefor
- readily susceptible ofmosture when the leath
er is made up for use, at the same time tha
p The interest of the tanner are affected by tn
rs loss of weight. DR.. Turnbull effects the re
moval of the hair be the use of sugar or an
oh substance containing the saccharine matter
or, if lime be used, it is removed by The AZ
ID plca,ion of sugar, before it can do any injur
ial whereas, by the old process, portion of
must forever remain in the skin. Hilbert
r., every process for rapidly in tanning, ha
:. been attended with loss OF quality, for til
~ process WAS expedited by The use of acids.-
he BY the new process not only are no aclt
,ur used, in addition to the usual tanning mater
has ais, but even the portion OF acid which tho:
materials contain is destroyed. The be
III tanners of Paris have certified to the reali
oss and great benefit OF this discovery after Sc
So inglhe operation performed under their ov
ov' ewes, and commission from The Acaden
- has been chosen to report on these remark
NV BILE useful experiments.