The Forest Republican. [volume] (Tionesta, Pa.) 1869-1952, 1892-10-12
SCIENTIFIC AND INDUSTRIAL.

a storm travels at the average rate OF
fifty miles an hour.
In ten years the descendants Of two
rabbits will number 70, 900.
A typewriting machine which will
print on the leaves of blank book Of
any thickness is the latest invention.
A French artist has succeeded in
photographing flying insect. The
time of exposure was but 1-250th of o
second.
A plant for the manufacture of hand
grenades has been erected in connection
with the National Artillery foundry of
Mexico.
African travellers tell us that the
white rhinoceros frequently dies from
eating poisonous plants which have no
effect on the black one, probably because
the fine scent of the latter tells him it is
dangerous.
Aluminium is found combined with
1876 other minerals, and therefore con-
stitutes large part Of the crust of the
earth, but until recently has been very
expensive because of the difficulty in
separating it.
A company in Louisville is manufac.
turing watering carts driven by electric.
ity. A long pipe pierced with small
holes diffuses the water, and in case of
meeting other vehicles the pipe can be
swung alongside of the cart.
Observations at thirty-eight stations
in the Adriatic, Mediterranean, Atlantic,
North "a and Baltic, have shown, ac-
cording>, DIR. A. Supan, that all the
seas of b ne, contrary to an oil
hypothesis, practically the same
level.
In order to prevent persons under
standing telegraphy from reading the
messages in offices and hotels, as they
are received by the sounder, secret
telegraph receiver has been devised,
fitted with resenator OF aluminium of
extreme sonorousness.
A Tennessee inventor has patented a
gauge for determining the age of horses.
The device consists of a steel plate, hav
ing tapered body portion, one of its
longitudinal edges being marked by
lines and figures. By applying the scale
to the teeth of a horse, its approximate
age is said to be determined.
DIR. Dareste has demonstrated that
monsters and monstruu;.ies during ami
NAL development are not the results of
pathological changes in the embryo, as
hitherto supposed, but notifications of
the processes of organic evolution, such
as bring about the difference between
individuals and races in mankind.
A new fly trap is run by an electric
motor, and consists of a belt of sweet
ened paper, about fourteen inches long,
passing over two pulleys, one of which
is covered by cone containing brush.
The paper moves slowly, and as it passes
under the brush the flies are swept into
the cone, from which they can find no
exit.
Currents of water serve to vast ex-
tent the purpose of distributing seeds.
Walnut, butternut and pecan trees are
found close to streams, where they drop
their nuts into the passing flood, to be
carried far away and start other groves
perhaps hundreds of miles distant. Tree
seeds of many sorts are carried by
oceanic currents.
Among marine architects it is be-
ginning to be serious question if iron
is not better than steel for shipbuilding
purposes; and the cases of the old Sarah
Sands, Great Britain and Great Eastern
are quoted as proving that iron-plated
ships, with their increased thickness and
better riveting are much stronger and
more lasting than any teel-constructed
vessel yet put to a breaking up test.