The Forest Republican. [volume] (Tionesta, Pa.) 1869-1952, 1889-05-15
SCIENTIFIC AND INDUSTRIAL.

Fifteen cubic foot of gas will give as
much heat as one pound of bituminous
coal
Hard-working Parisians average sensi-
bly, less in stature than their wealthy
neighbors.
A German chemist condemns boracic
acid as an ineffective and poisonous food
preservative.
The latest use of photography is to
make a cannon ball take picture of its
own wabblings.
Ice crumbles under saw and chisel, but
is said to be more capable than wood of
being smoothed and shaped by the plane.
A Dresden manufacturer has produced
| thread from the common nettlc SO fine
that sixty miles of it only weighs two
and one-half pounds.
1t has been noted at several of the lead
ing natural gas wells that the minimum
and maximum Of pressure corresponds to
The cbb and flow of the tides.
The saw is largely used now instead of
the axe in bringing down the giant red
woods in California. The tree is sawed
partly through, and then is forced over
by wedges
BY means Of the bisulphide process,
now used for paper pulp, Il foreign me
chanic has succeeded in preparing wood
ibre that may be spun and woven into
coarse cloths.
DIR. Lintner, the entomologist, SAYS
,hat insects destroy $500, 600, 600 worth
each year, and that single insect caused
loss of S15, 600, 900 year in the State
If New York.
Seamless boiler tubes are now made
from solid ingots of metal by a process
that twists and stretches the fibres, and
IS said TO make tube much stronger than
The ordinary ones
The common use of kerosene as u pre-
ventive of corrosion in boilers is not with
out its danger, as gas arising from it may
accumulate and explode upon finding an
opportunity to escape to a light,
A Photographic rejecting telescope
has been presented to Dunsink Observa-
tory having a mirror by With of fifteen
inch aperture. 1t will be employed in
turthering the study of star parallax.
Carriage manufacturers are predicting
that in the not distant future wooden
wheels will be done away with, and steel
wheels substituted on account of the in
creasing scarcity of lumber for wheels.
Soapstone is made into tubs, sinks,
stoves and so, and the waste is ground
into powder that is used for paint, and
as an indestructible wall covering as well
as an adult6rant to rubber for overshoes.
The new circular cloth so highly re-
commend as preventive of colds, is made
| of either wool, cotton or silk, so woven as
to inclosnRlls in which the air is warmed,
while the vapors of the body readily pass
off through them.
An English electrician has invented u
material that he calls "alterion, " for the
prevention of corrosion in boilers. The
interior of the boiler is coated with the
material, and from time to time electrical
currents are sent through it.
Kanaff, the new Russian textile, is
soft, elastic, silky and immensely strong.
1t takes all colored readily, and is easily
made into all manner of stuffs, but eSpe-
cially adapted to bagging rope and cord
age, as it is very cheaply produced.
Professor Haddon, of Dublin, declares
that species of fish of Torres Straits,
breathes largely through its tail fin.
Though living much out of water, it was
DOT affected by prolonged submersion, but
soon died when its tail had been vanished.
The process of manufacturing India ink
has been a secret with the Chinese for
many centuries, but firm of English
chemists claim to have discovered a pro-
cess of treating camphor with sulphuric
acid that produces a pigment identical
with India ink.
There is u small fortune waiting for the
man who can discover some process of
making the veneer used in making fruit
baskets flexible without the use of steam
or hot water, and thereby save the manu-
lacturers the time now wasted in the dry
ing of the material.
Workers in hardware and cutlery will
be glad to hear of a new solvent for rust
which is said to be very effective A
piece of rusty iron is immersed in sat
urated solution of chloride of tin for
twenty-four hours. 1t may then be rinsed
first in water and afterward in ammonia,
when it will be found that the rust has
entirely disappeared.
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