Clinch Valley news. [volume] (Jeffersonville, Va.) 18??-2019, 1889-05-31
. opULAR SCIENCE.

Haroury may be purified by the simple
aspiration of air through it
Electric targets for small-arm practice
are giving much satisfaction in Italy.
vulcanized asphaltum pavement is
being introduced in the City of Mexico.
Silesia intends establishing geological
station for the observation of fresh water
fauna.
London al. has ON unusually large
amount of carbonic acid in it during the
winter.
The isolated electric light installations
in the Madrid theatres are almost total
failures.
A soap mine has been discovered near
La Mesa, south of Imuris, State of Sonora,
Mexico.
proposed to be held in st. Louis next.
September.
Capitalists in Zurich aud Basic intend
utilizing tile falls of the Rhine for cleo
trical purposes.
Professor Eaton, of Yale, advocates the
storage battery system for street railways
as being much safer for the public.
In the Berlin Observatory series of
astronomical panoramas have been pre-
pared to explain the phenomena OF solar
eclipses.
1t is belie;ed that the electrical equip
ment of the Department of the Interior
can hardly be equalcd in the world for
safety and efficiency.
Professor Ayrton estimates that tine
power wasted at Niagara Falls exceeds
that which could be produced by the
annual consumption Of 100, 900, 900 tons
Cf coal.
In the country districts of Sweden
electric lighting is rapidly increasing.
! Farmers are putting in independent in
stalments worked by turbines at very
small expense.
A scientist, who claims to have dis
covered the secret Of pctrifylng wood on
n large scale, says that by means of his
process the largest wooden building
may be petritied.
The microscope often reveals impuri-
ties in diamonds, particles of organic
matter and bubbles of gas being COM
mon. Quartz, chlorte, pyrite, -hcmatite
and topaz have also been seen.
Recent developments tend to show
that the chief cause OF the burning out
of dynamo armatures is the insecure
fastening of the wire to the core, and
the consequent chatting of the insula.
ton due to the movement of the wire.
It's reported that Dr. Eisenmann, OF
Berlin, has invented Il piano which, by
the aid Of electro magnetism, can sus,
| tain, increase aud diminish sound.
| Another novelty will be that by moving
the eectro-magnets the timbre of the
tone is chancellor example, from that
of n violincello to a picco'o.
A fine quality of iron orcThas been dis
/ covered some forty miles west of Havana,
Cuba, not far from the port of Manil, aud
found to test some sixty per cent. in iron.
The first cargo of this mineral is now
! loaded, destined for Birmingham, Ma,
by Pensacola, Fla. 1t is said that there
is some 100, 900 tons lying upon the sur.
face at the mine, which can be brought
to the coast at small expense.
1t is claimed that lighting trains by
electricity has been Il rather costly ex.
pertinent, and the results have not been
altogether rs satisfactory rs was ex-
pected. At the commencement of the
run the light furnished is all that could he
desired, but after the current has been in
operation several hours the light gradu
ally becomes dim and insufficient for gen
eral purposes. Whether the motion of
the train has any effect on the battery has
not been determined.