The Forest Republican. [volume] (Tionesta, Pa.) 1869-1952, 1891-05-27
SCIENTIFIC AND INDUSTRIAL.

compressed air signals are succeSslul'
A petroleum bicycle makes forty-nine
miles an hour.
Wire-wound guns are the latest ac.
QUESTION of the United States Navy.
1t is said that at last satisfactory arc
lamp for use on an incandescent circuit
has been designed.
The electrical underground railway in
London has proved that speed OF
twenty-four miles an hour is practicable.
The electric arc is composed of stream
Of vapor arising from the actual boiling
or vaporization of the solid ends of the
separated conductors.
To secure uniformity IN the painting
and vanishing of their passenger and
freighs cars some railroads employ ex-
pert chemists to analyze the paints and
oils used.
A double hulled ship has been devised
by Captain Meacon, of Chelsea, Mass,
which is said to be absolutely unsinkable.
His plan has received Endorsement in the
highest quarters.
A new electric appliance is so con-
structed that in railway train signalling
it is impossible to give a clear signal be-
fore the delivery of orders intended for
the approaching train.
The only onyx polishing works in this
country, located in Rutland, Vt, will be
removed to Missouri and engage in pre-
pairing for market the vast quantities Of
ONYX mined in Crawford and Pulaski
counties.
One of the two chimpanzees at the
Paris Jardin d'Acclimatation inoculated
with Koch's lymph died forty eight
hours after the operation. The lungs of
the creature were sent to the Alfort
School of Medicine to be carefully ex-
amined.
At Mont.Dol, in Brittany, already
well-known geologists and pal@ontolog-
lists, the remains of about hundred ele.
plants have been discovered, gathered
on small surface of about 1900 square
metres. All the bones ore broken, and
it is thought that the animals must have
been eaten by prehistoric men.
In response to inquiries as to how hard
rubber can be polished, the following in
structions are given: Use felt lap
charged with the finest grade of pumice
stone mixed with enough lard oil to make
thick paste. Run the lap at a high
speed, and of course, apply the rubber
to the side and not to the rim of the lap
A device has been recently patented
in England for the purpose of removing
grease from gloves or fabrics. 1t is
called benzine pencil, and consists of a
cylindrical body about the size of an
ordinary lead pencil, containing benzine.
At each end thera is a thick piece OF
felt. One piece is intended to be
moistened by the benzine, while the
other end of the pencil is kept perfectly
dry to take up the superfuous moisture.
A number of experiments on the COM
parative palatability of insects, ETC., are
recorded in Nature, by E. B. Tichener and
F. Finn. The insects experimental
upon consisting of beetles, moths, bees,
etc.-were offered to domestic mice,
common toads, and a common mynah.
The results evinced considerable varia-
bility and some caprice in the tastes of
the animals fed, but do not indicate that
their appetites were voracious for the
delicacies given them. The stronger
beetles were taken with some hesitation.
The mice declined to take bumble-bees
the mynah ate wasps greedily; the toads
readily took wasps and bees, and were
often stung, without seeming to pay
much attention to the accident. The
cockroach was eaten by the toads. The
mynah for long time refused, and only
took it, as we'll as the earth-worm, finally,
in the dearth of our insects. A few
centipeds were given to the mice and the
mynah, but were never eaten, though
the mice, in one case, eagerly seized and
killed large specimen.