Belmont chronicle. [volume] (St. Clairsville, Ohio) 1855-1973, 1879-04-03
Science and Industry.

A sheet of paper dipped in chloride of
cobalt when the weather is to be dry and
pleasant will become blue. When wet
weather approaches it will turn pink.
The barometer flowers of France are
thus manufactured.
1t is stated by L. Thollon in the
Compile Rendus that by the use of his
newly-invented spectroscOpe he has OBJ
served a displacement of the solar rays
perfectly defined, and evidently ap-
proacheS the results of calculation.
Copper is now traeted in England by
the BeSseme process. A blast of air Is
blown through the copper pyrites. The
sulphur ih the ore acts as fuel, and the
temperature has been kept up for ten
hours without any external application
of heat.
The peculiar door and taste of boiled
milk is said to be due to sulphuretted
hydrogen, as may be shown by holding
lead paper in the vapor. Boiled milk
does not coagulate spontaneously so ed
silly as unbOiled, but requires the addl-
tion of less quantity of acids to pro
duce coagulation. Boiled milk is also
very slow in undergoing the fermenta-
tiOn process.
Vegetable isinglass, which has hither-
to been derived from Eastern Asia, is
now extracted from French seaweed,
and made useful in French factories. 1t
is, in its crude state, yellOwish gela-
tine, but which, after repeated expert
ments under the auspices of the Indus
/ friol SOaiofx- Of RGuora hoe hnpn
fully converted into what bids to prove
the best sizing for cotton cloth known.
DR.. Wachmuth, of Berlin, SAYS that
if one-third part of oil of turpentine is
added to chlorOfOrm, the latter can be
administered as an an&thetic without
the risk usually attending it. The rea.
son assigned is that the stimulating
properties of the turpentine intercept in
a marked manner the pulmonic paraly.
sis which is sometimes induced by the
chlOrOform, and which is often the cause
of death.
Maj. E. H. Cameron (of the Royal Ar.
tillery) has patented an invention
whereby matches can be rendered water.
proof. The process can be carried out
after manufacture, with slightly in.
creased cost. Matches coated with Ma
jor CamerOn's composition, which have
been soaked in water for twenty hours
can be struck with drop of water ad
herring. They can be ignited by friction
on a wet as easily as on dry surface
English Mechanic.
A novelty in domestic economy con
> SiStS in what is known as a duplex cir
cular revolving tire-grate." In this
which has the general appearance of al
ordinary CRATE. the Goals are placed in
cylindrical cage of iron bars, and so ar
ranged that, after ignition, the cylinder
may be rotated, which brings the un
burned Goals succeSsively in the mos
favorable position for combustion, an(
allows the escape of the ashes at the
same time. 1t is claimed that this ap
paratus effects saving in fuel of more
than fifty per cent, almost the whole OF
the heat being thrown in front of the
CRATE.
Dr. Angus Smith claims to have made
the interesting discovery that charcoal
absorbs gases in definite volumes, the
physical action resembling the chemical
Calling the volume of hydrogen absorb
ed 1, the volume of oxygen absorbed is 8
that is, while hydrogen unites with
times its weight of oxygen to contitute
water, charcoal ObsOrbs eight times
more oxygen by volume than it absofbs
hydrogen. The specific gravity of oxy,
gen being 16 times greater than hydro
gen, charcoal absorbs times 16, or 12s
times more oxygen by weight than
it does hydrogen, and so on.