Clinch Valley news. [volume] (Jeffersonville, Va.) 18??-2019, 1889-09-13
POPULAR SCIENCE.

Underground lighting has proved so
successful i'll Chicago that the plant is to
be largely increased.
Power obtained from fall of water q
mile distant is to be used for lighting the
tower of Segorbc, in Spain.
The maximum intensity OF the light
from the Eiifcl tower is 500, 600 carcels,
giving range Of 127 miles
1t has recently been proposed to use IN
alloy OF zinc and phosphorus in boilers to
prevent incr,istation and Dittny.
Naturalists and others are becoming
considerably alarmed over the prospect
OF the carly determination of the kanga-
roo.
Experiments made on the dog and
rabbit show generally that the quality of
water is less in the veuous than in the
arterisl blood.
NJ. Chauvin concludes that Iceland spar
possesses magnetic rotary power not only
IN the direction of ITS axis, but also in
the ncighboring direction
After more than twenty years the
pearl oyster has produced pearls off the
Madras coast in sufficient quantities to be
worth the expense Of fishing.
Gurjun oil produced from Il fir tree
that grows i'll the Anduramc Island is
sad to be sure cure for leprosy. 1t is
used by Injunction and taken internally.
Carpenters and other tool users who.
keep up with the times now Use Il mixture
of glyccrinc instead of oil for sharpening
their olge tools. Oil, as it is well known,
thickens and smcars the stone.
The invention of Il "fog machine" by
which water is thrown in spray as fine as
vapor, makes it possible to spin the finest
cotton thread i'll mills established in the
hottest, dryest parts of the South.
The Insect House of the Geological So
clety of London is said to be the only
place where IN attempt is made to at
tract public attention to the various and
wonderful; groups of the insect family.
The increase in the amount of tonnage
passing through the Sucz Canal is claimed
to be due i'll great measure to the light
ing OF the canal by electricity, admit
ting of its use by night as well as by day.
Abroad conductors are being laid
underground and insulated by placing the
bare wires i'll glass tubes, which are pro-
tectcd by layers of cement. outside OF
which is an iron pipe. This method is
cheap, gives high degree of insulation,
and water cannot penetrate.
Both the French and German Govern
mcnts have provided facilities for the OK
animation and ccrtiiication of electrical
Instruments, and it is now found that an
paratus bearing the official Endorsement
brings Il better price in Continental
markets than non-attcstcd instruments.
y steam carriage in which coke is usec
as fuel has lately appeared in France.
The driving is effected by two hind
wheels, and the speed attained is about
fifteen miles per hour, twenty eight and
three-quartcr gallons of water being suf.
ficient for Il run of twenty miles.
in IN improved method of wire-mak-
ing, the wire is drawn cold over success.
sivc pairs of rolls, cach pair having a
greater speed than the pair preceding it,
with an intervening friction clutch to
graduate the speed Of the rolls TO the
speed of the wire in process of rolling.
From the general appearance of the
vegetation. together with u discussion of
the origin and relations of the florist, il
is concluded by eminent botanists that
Greenland is not European province
from tlic point of view oi botanical &C.
ograrhy, but has nearer relations &c
America.
4 century ago only 500 species of
orchids We're known. ard those very i'm.
perfectly. Now the latest authority gives
the extreme number OF knows species as
10000. This may be an excessive esti.
i1atc, but shows the immense advances
which have been made in our knowledge
OF these interesting plants, for which
collectors now ransuck the most remote
quarters Of the globe.