The Republican. [volume] (Oakland, Md.) 1877-current, 1889-08-10
SCIENCE AND INDUSTRY.

chemically. if used in amounts which
are commonly safe, do not sterilize
water.
During the last ten years an oclu-
list of Cronstadt is said to have treated
thirty cases of photo-electric ophthal-
mia, new disease due to the action of
the electric light on the eyes.
"A new lacquer named "ardenbrite''
has just been brought out in London,
England. 1t is said to be proof against
water, steam smoke, sea air. and sea
water.
Carriage manufacturers are pre-
dieting that in the not distant future
wooden wheels will be done away with,
and steel wheels substituted on account
OF the increasing scarcity O. lumber
for wheels.
The yellow cedar of Alaska is said
to furnish timber of great value, hav-
ing a close, fine grain, and being re-
markable for its strength and dura-
bility. 1t is also very fragrant, and,
taking readily fine polish, becomes a
most desirable cabinet wood.
Where filtering is really necessary
it is in general best for the community
that it be done carefully on a large
scale through sandbeds upon which a.
line layer of organic and inorganic mat
ter is expressly produced by sediment
alton, because of its valuable action in
holding back the great majority of the
bacteria.
DIR. Peyrand, a consulting physi-
clan at Vichy, claims to have dis
covered an efficient method of treating
rabies. BY injecting into rabbits the
essence of the familiar herb called
"tansy," he produced what he calls
hydrophobic intoxication, or something
very similar, and with virus thus OBJ
tanned he mingled ten per cent. of
choral. He injected several animals
which had rabies with this prophylac-
tic, and he processes to have cured four
out of six.
Another unbreakable substitute for
glass, a French invention. consists in
inmersing wire in heated state, in a
thin paste formed of soluble glass, gel
atine, and glycerine, or glucose, in pro-
portions varying according to the use
for which the material is designed.
When nearly dry, the sheets are dipped
in concentrated solution of chrome
alum or bichromate of potash. Any de-
sired coloring matter may be incorpo-
rafnI with ha ra1nfinA
other protective varnish applied to the
surface.
"A scientist has discovered the ad-
vantage of dark skin as veil against
the heat in hot climates. The carbon
layer in the skin of the negro, being
Opaque, like other forms of carbon,
must form an effectual veil, and thus
protect that most imp ortant organ be-
low the true skin, a bodily envelope or
tissue presenting vast surface of cir
cVlating blood, which is certainly SUBJ
ject to brilliant illumination when only
protected from sunlight by the thin
translucent cuticle.
The riveting of stovepipe is new
departure. Formerly each of the six
or nine rivets in a piece of pipe was
drawn and driven separately, but by
the use of newly contrived riveting
machine all the rivets are drawn by
one drop of the hammer, and all of
them are set in the same manner, one
operative with a machine turning out
from 600 to 1000 joints of pipe per day.
The pipe is formed on a cylinder con-
nected with the riveting machine. an
arrangement which makes it uniform
in size and leaves the lap smooth and
free from buckles. Easy of operation,
the apparatus is said to do the work
perfectly.
SO indestructible by wear or decay
is the African teakwood that vessels
built of it have lasted fully 100 years,
to be then broken up only on account
OF their poor sailing qualities on ac-
count of faulty models. The wood. in
fact, is one of the most remarkable en-
ployed in human industries on the
score of its great weight, hardness and
durability, its weight varying from
some forty-two to fifty-two pounds per
cubic foot. 1t works ensily, but be-
cause of the large quantity of slick con-
tanned in it the tools employed in its
manipulation are in a short time worn
away. 1t, however, possesses the ad-
vantage of containing an oil which
prevents the spikes and other iron
work with which it may come in con-
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