Clinch Valley news. [volume] (Jeffersonville, Va.) 18??-2019, 1890-01-10
POPULAR SCIENCE.


One OF the industries now followed in
London, and certainly a novel and re-
markabie one, even for this age, is that.
OF separating and storing oxygen from the
atmosphere.
The method. by I'm English inventor,
OF manufacturing copper articles direct
from rough copper bars, will, it is
CANNED, achieve results for that metal
eqna' IN Importance to what Besscmcr's
process has done for iron and steel.
The statement is made by Mr.. Wcbber,
the wcll-known authority in engineering
matters, that warm, wcll-lubricated
bearing will ran with less friction than
cold one; by warm bearing heing
signliied temperature between one
hundred sud thirty and one hundred and
sixty degrees +.
Aero'lteS arc OF two kinds, stony and
metallic. Stoly ,.croliteS resemble the
perdot, the scoria from the earth's dcep
interior; metallic acrolites consist chief
OF iron aud nickel in proportions never
lonnu on eGrtiE There are in metallic
aeroiitcS twenty-five clements, all told,
onc-third of those OF the earth.
lii fifteen eases investigated after light
ming has struck building and done more
OF less damage, it WAS found that in nine
eases the discharge made its way 10 earth
through water pipes, in two through gas
pipes, and III only one was there any
probability of the regular lightning con-
dnctor having done its duty.
II is stated That in one establishment
III Cincinnati the large number of %, 900
gold dollars are annually beaten out into
Sold lcai--a statement not more remark
able than the fact, rs is also asserted,
that as many as 400 thicknesses of the
gold leaf are required To equal sheet of
thin paper and $50, 900 to form an inch.
Herr Ebers, German cxperimentcr,
has found that the human eve is mora
sensitive to green rays of light than 10
red rays, and Ia red more than to blue
rays. Since the red rays are those of
longest avc-lcn"th, and the blue those
of the shortest vc-length, il follows
that the eye is most susceptible to the
rays Of medium length.
Professor Lintner estimates that il all
The species Of insects inhabitina the world
were known, their number would reach
Il million, and, descending To the con-
sideration of individuals, he adds that he
has seen at one glance, within small cX-
tent oil roadway, mere snow iicas Of Il
single species shan there are human
beings on the entire surface of the globe.
The use OF electricity i'll medicine is
rapidly on the increase AT the last
meeting of the Institute of Medical
Electricity in London the opinion was
expressed that the current course prom
ised tc be of great practical service, and
was Just the thing wanted hy those MEM
bcrs OF the profession who had not hither-
to made Il careful study of electro
therapeutics.
SchonGeld's edition Of Areelandcrs
"Durchmusterrmg," or survey of the
heavens, which takes in the northern
heavens us far down us twcniy-ihrcc de-
grces south inclination, contains the
places of 1873, ESQ stars. There are thou
sands more beyond the Limits; named
above, and recently it was announced
that new clusters OF stars have been dis
covered through the Lick telescope Of
such magnitude that the observer, had
decided not 10 attempt TO place them un-
I'll they had taken photographs.
Drilling by means OF electricity If now
proposed for mining, .tunneling, and, in
Tact, anything requiring work i'll BARD
rock. According 10 the experimental
tests made with this new method Of
operating, the drill was run by II moior
receiving its power from the electricity
furnished by II large dynamo, the motor
itself being about eight inches lon. and
seven i'll diameter, with armaturc ri four
inches diameter, the shaft which the
armaturc runs on being hollow, So as to
admit g! water passing through it and
through the diamond drill.