Shenandoah herald. [volume] (Woodstock, Va.) 1865-1974, 1892-10-28
POPULAR SCIENCE.
Copper will be refined by electricity.
The fastest passenger elevators travel
d the speed of 1900 feet a minute.

Copper will be refined oy electncity'
The fastest passenger elevators travel
al the speed of 1900 feet minute.
Durable brick, formed of Clipped
granite aud clay, is recent Scottish in
'vention.
Germany will recognize the cent?
grade thermometer as the official instru-
ment, in place of the Reaumur.
There are very few cases of color
blindness among Indians. They occur
more frequently as man becomes more
highly civilized.
Renfrew, Penn, has a new industry
in the form of plant for the manufac-
ture OF lampblack. One barrel Of oil
will yield thirty-seven pounds of lamp
black.
Crematory experts say that it is impos-
sible to cremate set of false teeth.
Four thousand degrees of heat have
been turned onto the artificial grinders
without affecting them in the least.
A spray of pure oil of turpentine,
mixed with one pc, cent. of lavender oil,
is said to have an astonishing effect 10
purifying the air Of living rooms, the
action being attributed to the ozone
formed.
The Central Pacific Railroad has some
monster engines in use on the western
end of its route-those made at the Sac.
ramento shops in 1888. Each of these
gigantic locomotives weighs, exclusive
of tender, 1913, 900 pounds.
An eminent physician believes that
savage races have better color perception
than civilized. OF 100 Indian boys he
found none color blind; another group
of $50 had but two, while none Of the
girls was found to be color blind.
A bed of opals has been discovered in
Ascotin County, Washington, on the
Grande Ronde River. That county has
already been shown to be exceedingly
rich in minerals of various kinds, and
now precious stones are added to the
list.
The total work performed by the
human body during five hours OF noun
tain climbing is equal to 1925, 900 foot.
pounds, not counting other forces ex-
erted. which DR.. Bucheister says will
run the grand tOtalup to 1880, 600 foot
pounds.
Volcanic ashes often travel long dis
tance. A remarkable shower OF vol
canic ashes has occurred recently in sew
eral parts of Finland. The ground in
some places has been covered to the
depth of nearly en- inch. The pheuom-
enon IS attributed to volcanic eruptions
in Iceland, hundreds of miles away.
Au infinitely thin coating OF zinc is
applied electrically to a copper wire By
Professor Silvanus Thomson, when the
wire is held in the air until the zinc
gradually disappears by sinking into the
copper. The operation may be repeated
several times. The copper wire will
then be heavier than at first, but a much
poorer conductor Of electricity.
During thunderstorm the air is OF
such varying density that thunderpeals
are never heard at distance correspond
ing to their violence. For the same
reason the roar of cannon on field OF
battle is not noticeable, and the day has
often been lost within short distance OF
the reserves of the defeated army, which
were waiting for the sound of artillery
to call them to the scene Of action. The
air at night is more homogeneous, aud
hence sounds are heard more clearly aud
farther than iu the daytime. In fcggy
weather sounds suffer innumerabe de-
Elections from the mist, aud are soon de-
stroyed,