The Forest Republican. [volume] (Tionesta, Pa.) 1869-1952, 1891-09-30
SCIENTIFIC AND INDUSTRIAL.
4 wood.carring machine is succ

a wood-carvlng machine is success
full
Terrorite is more powerful than dyn-
Amite.
A pound of phosphorus is sufficient to
pit 1,000,00 matches.
A Swedish cavalry officer has invented
horseshoe on which the calks and clips
are changeable.
A street railroad to be operated by
motors run by fuel oil will soon be in
operation near Prague.
The Philadelphia mint has installed
an Eddy electric motor of twenty-five
horse power, which is run by wires from
the street.
It is estimated that twenty thousand
horse power will be required for the
electric lighting plant of the Columbian
Exposition.
Observation step-ladders are to be
used in the Belgian artillery, the OBJ
iect being to enable a commander to
better direct the fire of his gunners.
The Michigan Central Railroad has in
lse a new machine that does the work
Of 300 men in scraping the dirt dumped
alongside of the track to the edges of
the fill.
A spring has been discovered in
Greenville, N. H., which contains an
almost phe henomenal amount of lithium,
,ven more, it is said, than the famous
spring at Londonderry.
Watch crystals are made by blowing
sphere of glass about one yard in diam
,ter; after which the disks are cut from
t by means of pair of compasses having
diamond at the extremity of one
eg.
A device has been invented by which
in engine may be stopped on any
loor OF a building by simply pressing
button, thus making an electrical
,ounection with the governor of the en-
CINE.
A toilet brush is made of two halves
which are hinged and arc detachable,
)ne half being the brush and the other
aalf the mirror, while in the space be-
.ween is a comb, a tooth brush and a
outton.hook.
The Munich Poeller Physical and Op-
iical Institute have constructed for the
Chicago Exhibition an enormous micro
Icope, manipulated by the aid Of cleo
;ricity. 1t has a magnifying power Of
IL, 900 linear perspective and has cost
$3.50.
1t is stated that DR.. Lehner, of Augs-
burg, Germany, has solved the problem
If manufacturing artificial silk. The
ia5ric is said to be superior in lustrc to
natural silk, and cannot be distinguished
from it; and that limited company is
20 be constituted to work the invention.
If this is true, and is found to be
thoroughly practicable after fair trial,
It will revolutionize the whole industry
Of producing and manufacturing raw
silk.
Mr.. II. Darwin, of the Cambridge
Scientific Instrument Company, has de-
vis9d soup micrometer" for measuring
the rate of growth of plant. A thread
is attached to the upper end Of the plant
and passes over pulley. To its lower
end is fastened weight, W. th descends
as the plant increases in height. The
amount of its descent is a measure of the
vertical growth of the plant, and it is
obtained very exactly by means of the
micrometer in question.
In paper read to the French Academy
of Sciences, M. Colin discusses the acticr
of cold on animals. The rabbit endure,
considerable cold. Adults have lived
in ordinary hutches suspended from the
branch of tree or standing on heap
of snow, and theA temperature has only
been lowered about one degree in five or
six days. when the outside temperature
varied from ten to fifteen degrees Q.
Other individuals have lived in perfec.
health for two months in cubcal hutches,
completely open on one side, when the
temperature ranged from ten degrees to
twenty-five degrees. Sheep and pigs
are also able to live through severe
weather, but the dog and horse are killed
by it.