The state rights democrat. [volume] (Albany, Linn County, Oregon) 1865-1900, 1885-01-16

Black marble may thus bo polished
Wash the marble with soap and warm
water, and when II is dry rub it we'll
with furniture paste or French polish,
and then rub IL over with an old silk
After two or three trials
the marble will become quito bright.
The French Government Is having
constructed abroad large and costly
special machine tools TO aid in the con.
struction of light-armored, swift cruiG-
ers. One Of these appliances Ia shear
ing apparatus for cutting up steel plates
one inch in thickness. The total weight
OF this machine and tho engine to oper.
ate it (combined) is about thirty.Gye
tons.
Monuments and statues cast from re-
fined zinc arc given a sparkling appear
ancc by directing saud blast under
steam pressure upon them 10 that the
sand cuts the surface but does not ad.
here to II. A thin film Of oxide is thus
forlGod, which stands atmospberi, ex-
posuro admirably yet the tilm is no
thin that IT scarcely admits Of ordinary
measurement.
There are now M cotton seed oil
mills In the United States, nearly all OF
them being in the South. Competition
has resulted in the increasing Of the
price Of seed and the reduction Of the
price Of oil, until several mills have
been forced 10 suspend. IL is stated
that 100000 were sunk by the
Memphis oil mills last year, and few
millG can run more than four months
in the year.
The 6rst II the Scotch dredges for
canal work arrived in Panama Bay on
Nov. "a, having made the voyage from
Scotland in eighty eight days. The
dredge is 10 feet long her greatest
breadth is twenty-six feet and her depth
twelve feet. She has two compound
engines-one for driving the vessel and
one for working the dredging maehin.
cry. Each engine ia sO-horse power,
but can be- worked up to 400.
Dr. klezko Of Vienna has suggested
the use Of petroleum or parsfIine as
powerful preventive OF cholera. In
that portion Of the eastern county
where petrolum oils are found the work.
ing people have 80 Tar escaped complete
iy from enolors, even when it has broken
out in the districts Immediately around
them. This is attributed to the emana-
tions from the petroleum producing
soil. which Are supposed to kill the
pestilen;ial germ AS well as all kinds Of
insects.
Tho Society of Chemical industry
published in their Journal this process
for nickel-plAting zinc The zinc,
having been cleaned by means Of dilute
hydrochloric acid and thoroughly wash
ed, is hung in the nickel bath for q
short time, aud hen it 10 taken out il
Is rinsed and scrsped, 10 a. to remove
all the coating that does not adhere
firmly. This is repeated until the zinc
in covered with thin film Of nickel
which can afterward be made as thick
as desired. The suitable current
strength is easily found. When th,
sine is once thoroughly covered th'
current may DO increased without. in
cltring any risk Of peeling of
A new kind of slate roofing has come
into favor. Each slate is laid ia u pc
culiar kind Of cement, consisting @
liquid coal tar thickened with cemen
or, better still. quantity of groun'
slate, slaked lime and linseed oil, th
proportion varying according to the re
quirements Of the case. This substance
is heated until liquid, poured on a She
roof, aud the states embedded in it witt
their whole face exposed. When O
just the right thickness, the compound
adheres with extreme tenscity to th'
slate, and cannot be detached withou
violence. The cost Of roof of ihiI
kind is said to be less than one of tin
and, on account Of the greater surfac
exposed, is considerably cheaper thar
ordinary slate roofs.