The Forest Republican. [volume] (Tionesta, Pa.) 1869-1952, 1892-02-17
SCIENTIFIC AND INDUSTRIAL.
A cushion car wheel is new.
Petroleum block fuel is successful.


Germany stands at the front in elec-
trical science.
German physicians report several cures
of whooping cough by inoculation.
A naturalist says that of all animals
the horse has the acutest sense of hear
ing.
The largest known moth is the Giant
Atlas, native of China, the wings of
which measure nine inches across.
The engines on the Manitou and Pixies
Peak Railroad are reported to have sue
cessfully used crude Colorado petroleum
for fuel.
There is a very strong flow of natural
gas in the bed of the river about three
miles from Ventura, Cal. A lighted
match will set fire to a space six or eight
feet in diameter.
A careful examination of the aqueous
humor of the eyes of cattle will determine
whether they are suffering from tuberclc
or not. The bacilli will be found there
in all cases where the disc ase exists.
The word knot, signifying certain
distance over water, is one-sixtieth of
mean degree of the carth's meridian,
which in figures is 6, 076, S1S feet, 2025.6
yards, or one mile aud 1856 yards.
A new railway is projected on which,
instead of trains, single cars of great
length will be propelled by electricity
supplied to them through the rails. The
speed to be attained is from 12) to $50
miles per hour.
In order to prevent the accidents that
so often occur when life-boats are
lowered from the sides of ship there
has been invented a raft. that supports
the boat, and from which it is launched
upon reaching the water.
Many savage tribes constantly use
without harm the flesh of animals killed
with poisoned weapons; and in recent
Investigations with ANIMALS killed by
various poisons-such as strychnine,
tartarized antimony and esernc-the
flesh was found to be of unimpaired.
flavor and to produce no i'll effects.
Professor r. L. Garner, the prominent
scientist of Washington, who has been
III SOhoulNobiOh WIN L dul uu Slulllu
the African traveller, in regard to his
proposed trip to study the languages of
monkeys, has entered into negotiations
with Woodworking manufacturers at
Philadelphia for the construction of the
cage to be used in Africa.
In new method of hardening plaster
of paris, communicated to the French
Academy of Sciences, the plaster is
mixed with one-sixth of its weight OF
fine, freshly slaked lime, and used with
as little water as possible. When thor.
oughly dry, it is treated with II solution
OF either zinc sulphate or iron sulphate.
With the first, the color remains white,
while the second, by gradual oxidation,
yields the color of lion rust.
DR.. Marcy, the eminent French phys.
iologist, has been studying the flight of
insects by Photochronography, the ap-
paratus used to obtain photographs
allowing exposures to be made so short
as 1-25, 900 of a second. His observa-
tions indicate that the wings of insects
in fight, by meeting obliquely the re-
sistance of the air in to-apd fro move
ments, act in very similar manner to
the sculls used to propel boats.
A method of recovering the gold and
silver waste of Photographic processes
consists of suspending in the liquids
containing the metals in solution plate
of carbon attached to the positive pole OF
a battery and a zinc plate connected
with the negative pole, the two being
separated by about an inch and a half.
The closing of the circuit causes the
metal to be precipitated to the bottom of
the solution IN the form of a black
deposit, which is dried and reclaimed in
the form of metal by melting in a cru.
cible.