The Appeal. [volume] (Saint Paul, Minn. ;) 1889-19??, 1889-08-17
SCIENCE AND INDUSTRY

SCIENCE AND INDUSTRY.
Drugs and other agents acting
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, a new disease due to the action of
the electric light on the eyes.
A lacquer named '.ardenbrite''
has just been brought out in London,
England. It 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 of lumber
for wheels.
The yellow cedar of Alaska is said
to furnish timber of great value, hay
ing close, fine grain, and being re-
mal-kable for its strength and dura
bility. 1t is also very fragrant, and,
taking readily fine polish, becomes a
most desirable cabinet wood.
Where tiltering is really necessary
it is in general best for the community
that it be done carefully on large
scale through sandbeds upon which a
tine layer of organic and inorganic mat
tor is expressly produced by sediment
atiou, because of it's 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 te,l 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
immersing wire in heated state in q
thin paste formed of soluble glass, gel
atlne, and glycerine, or glucose, in pro-
portions varying according to the use
for which tho 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-
rated with the gelatine, and copal or
other protective varnish applied to the
surface.
"A scientist has discovered the ad-
vantage Of a 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 efectual veil, and thus
protect that most imp ortant organ be-
low the true skin, a bodily envelope or
tissue presenting a vast surface of cir
culating blood, which is certainly SUBJ
ject to brilliant illumination when only
protected from sunlight by the thin
translucent cuticle.
The riveting of stovepipe is q new
departure. Formerly each of the six
or nine rivets in piece of pipe was
drawn and driven separately, but by
the use OF newly contrived riveting
machine all the rivets are drawn bv
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 &C
count OF faulty models. The wood, in
fact, is one of the most remarkable en-
ployed in human Industries on the
score Of it's great weight, hardness and
durability, it's weight varying from
some forty-two to ffty-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 it's
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-
tact from rusting.