Savannah morning news. [volume] (Savannah) 1868-1887, 1884-02-17
BITS OF SCIENCE.

The sawdust and refuse of the sawmill
is now made to yield fourteen gallons of
turpentine, three to four gallons Of resin
and quantity of tar per cord,
To make irridescent glass, before it is
put into the annealing furnace, and while
it is yet hot, a vapOr is passed over it, the
product OF a mixture of protO-chloride of
tin, carbonate of baryta and carbonate of
strOntian.
Leather car wheels are'made in France.
The inventor is NJ. de la Roche. I'm.
tanned buffalo hides are cut into strips,
and these are built up into solid disks,
which are strongly held together by two
iron rings after they have been subjected
to hydraulic pressure.
A proprietor of local chain works says
that IN 1865, when he first commenced
making chains, he got over 81 pair for
trace chains, seven years later Go cents,
and now 80 cents. For coil chains, in
1872, he got 2S cents a pound, against a
little over 81 cents now.
A French savant, N. Chevreul, believes
the action of rolls for grinding wheat is
better calculated to preserve intact the
cells of the interior of the wheat berry
than is the action of stones, which dis
organize the cells by their tearing action
instead of disintegrating them.
Glass ornaments, cut to initiate dia-
mOnds, rubies, ETC., are now made in
Paris, and they are Illuminated by a small
incandescent lamp, whose power comes
from small battery which is concealed
upon the person. The brilliancy of the
ornaments can be easily imagined.
An OIL for betting is recommended which
consists of nine parts linseed oil and four
parts Of htharge, ground in water.
These, boiled to a plastic consistency,
rn.4a, i
tine, furnish an oil which, it is claimed.
possesses many admirable qualities.
An electric bouquet was presented to
the Crown Princes of Austria, a short
time ago, at Vienna, which consisted of
a group of snowy globes, inside of each of
which was an incandescent lamp, fed
from small storage batteries in the vase.
The capacity of the battery was found
sufficient to maintain brilliant illumina-
ton for three days.
The decline in the price ofcopper makes
it probable that it will be used as roofing.
among other new purposes. 1t does not
require TO be painted like the tin roof
every TWO or three years. and it is not
subject to rust. Even at present prices,
though copper roof might cost two or
three times as much as a tin roof, in the
end it would be much less expensive.
Rubber rings such as are used on fruit
cans often become hard and brittle. They
can be restored by letting them lie in
water in which you have put little am
monia. Mix in this proportion: One part
ammonia and two parts water. Some
times they DO not need to lie in this more
than five minutes; but frequently a half
hour is needed TO restore their elasticity.
1t is stated that the antiseptic action of
copper suiphate is slightly superior to
n Of col nrr1fo zosr L..
greater than that of phenol; five times
greater than that of alum, tannin, and
arsenious acids; and ten times greater
than choral hYdrate and the ferrous
salts. Copper chloride is from one-third
to One-half more efficient than the sui
phate.
To write on metals take half pound Of
nitric acid and one ounce of muriatic
acid. Mix and shake we'll together, and
then it is ready for use. Cover the plate
you wish to mark with melted beeswax;
when cold write your inscription plainly
in the wax clear to the metal with a sharp
instrument. Then apply the mixed acids
with a feather, carefully filling each
letter. Let it remain from one to ten
hours, according to the appearance desir-
ed; throw on water, which stops the pro-
cess, and remove the wax.
DIR. Semnola recommeds the following
mixture as a good remedy in the denutri-
ton of fever patients: Pure glycerine
thirty, citlic acid two and distilled water
500 grains; one or two tablespoonfuls
every hour. Glycerine, which is an
economizing agent (dgent d'epdrqne) }, and
a succedaneum OF cOd-hver oil, may, ac-
cording to DIR. SemnOla, be employed with
great advantage in the treatment of fevers
Ofprolonged duration, such as typhoid, in
order to diminish febrile consumption. Its
employment is especially indicated when
there is reason to fear that alcohol, used
so much at the present time, may cause
excitement of the nervous centres capa-
bic Of aggraVating the disease.