The Pickens sentinel. [volume] (Pickens, S.C.) 1871-1903, 1885-09-03
PRACTICAL ART
Some Recent Achievements in Tha, r

"''' N''o'' hchi'F'monts In Tliat Zinc.
Twenty miles is the distance penc-
trated by tho improved fog-signals now
III use. This power, it appears. is
galnod by two slotted cylinders, one
fixed and the other revolving in il.
Iho slots, as they pass ono another,
stop or cut oil tho passage Of Conl3rcss-
od air or steam, thus causing Il series
of vibrations, aud, consequently. Il mu-
sical note, the pitch Of which dcDcnds
upon the speed of the revolving cylin-
der. In order to vary this uoto it is
only necessary to control this velocity.
The doubio-nOtC horn is formed with n
casing, within which ayc fixed slotted
cylinder and revolving cylinder mov-
ing upon spindle. The slots are
formed in each cylinder ut opposite in
ciincd angles, so that tho motive fluid
impinging against q number Of incliu-
cd planes causes the inner cylinder TO
rcvoIyo with great rapidity, carving
two disks. These arc attached to the
common spindle, and upon their peri
phcrics are pressed levers, under tho
action Of small pistons operated by dia-
phragms, TO the outer surface Of which
compressed air is admitted. One brake
is put on for high noto, both brakes
for Il low note.
Largo quantities Of timber arc now
crcosotcd at tho West in n special man
nor, for railroad purposes, the effect
bong to increase the tonacity of the
wood for holding spikes, etc, rs we'll
as its density and ability to resist me-
chanical wear. This is done by means
OF an apparatus consisting of boiler
plate cylinder, Of II sizo adapted to tho
timber; this cylinder is of strength
sufficient to rosist 800 pounds pressure
per square inch, and has a track OK
tonding for its whole length along tho
bottom, the cylinders ends being clos
cd by strong iron doors, air and water
tight. When timber has been run in 10
the cylinder and the doors closed,
steam at about 100 pounds pressure is
cjectcd into tho cylinder, the supply
continuing as required b. tho nature
and dryness of the wood; the steam is
then shut of, and vacuum pumps
worked as long rs any liquids or vapors
are obtained, the hot preserving liquid
being now run into tho cy lindor from
the reservoir until full. The force
pumps arc again operated until the in
terror pressure is sOmo 100 pounds per
inch, and kept thus until sufficient pre-
scrvative fluid is forced into tho pores
OF the wood; the force pumps arc now
shut off, and the crcos0to oil or other
liquid contained in the cylinder is dis
charged in suitable cistcrn, after
which tho doors 1T the ends of the cyl
indcr arc opened and the car CARVING
the timber or ties run out.
a great many napkins and other az
uclcS OF usefulness are now made in
Europe from the bark Of the narcr
mulberry. Tho bark for these p,r-
poses is first dried in the air for two or
three days, thcn plunged for twenty
1our hours in 4 current of fresh water,
after which, with the aid OF II pHrlicu-
lar KIND or cord, the two species Of H.
brcS OF which it is composed are sep
aratcd. The interior iibYcs arc those
from which fine paper is made; thcy
are rolled into balls Weighing about
thirty-fire pounds zach, which are
washed anew in running water, in
which they are allowed to soak a
shorter time than previously, and arc
then dried; finally they arc boiled III
lyc made from the ashes Of buckwhcat
Hour, constant stirring being kept up;
another washing in pure water carries
away tho last impurities, and the librrs
arc next pounded with hammers of
wood for about twenty minutes; after
this they arc q second time rolled into
balls, and finally transformed into
pulp, ricc-wator being mixed with it.
The subsequent treatment Of the pulp
is identical with that of the ordinary
manufacture of paper. Leather pa
per" is obtained by the superposition
of many sheets Of the material Drcyi-
ously stepped in "yonoko," pressed,
and glazed with "shcllas."
The operation has been successfully
accomplished by & German chemist of
separating rags of cotton and wool
mixed by snbjecting them to the action
of jet of superhoatcd steam. Under
pressure of five atmosphcrcs tho
wool mclts and sinks to the bottom of
the receptacle, while cotton, linen, and
other vegetable Gbrcs stand, thus re-
naming suitable for paper manufac-
ture' The liquid mud which contains
the wool procipitatcd by this means is
then dcsiccatod; the residue, TO which
is given the name Of azotinc, is COM
plctcly soluble in Watc1 and is yalua-
bio on account Of its nitrogen. Tho in
creased value of the pulp free from
wool is sufficient to cover the cost of
the process.-NcW York. Sun.
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