The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1888-06-02
SCIENCE AND INDUSTRY.


Extracting oil from cedar boughs
Is new industry in Maine.
Rosewood shingles are being inn
ported as anovelty for trimming snowy
cottages at seaside resorts.
Steel. when hardened. decreases In
specific gravity, contracts in length and
increases in diameter
"A New York halter says that mono
of the so-callcd Panama hats are made
at Panama. The best of them, he ex-
plains, comes from Guyaquil.
"A late refinement in dentistry Is
tiny electric lamp for lighting up the
cavities of teeth during the process Of
filling.
dealers in hard wood furnishings
say that sycamore wood is rapidly
coming into use. 1t "works" well.
makes an excellent finish, and is much
cheaper than birch, maple, or oak.
A sugar refining company with
$4,000, 900 capital has been started to
use Henry Friends new method of re-
tining by electricity. The cost will be
about seventy five cents a ton.
"A recent English invention relates
to casting packing rings ready for use
without boring or turning. The rings
are cast in chill mold around me-
talic core.
The Introduction OF American
watches into England has reduced the
number of gold cases marked at the
London Assay Office from 34,s44 in 1876
to 20, 4l6 in 1886, and of silver cases
from 1l9, 1874 in 1876 to 95, 70S in 1886.
The mystery regarding the whites
of eggs after the icc-crcam factories
have used up their yelks is explained
by a statement that they are used to
make albumenized paper for photogra-
ply.
The question having arisen as to
why the fallen branches of trees, ut
certain stages Of decay, are more or
less colored through their tissues with
various shades of green, it is alleged
that chemical analysis shows the pres
ence of iron as the base of the green
coloring matter.
The smallest circular saw in use is
one used in Sitting gold pens. 1t is a
disc about the size of y five-cent piece
and has the thickness of ordinary
paper. Its velocity tends to keep it
rigid enough for use; four hundred
revolutions minute is the ordinary
rate of these diminutive saws.
| The latest idea in the direction OF
waterproof footwear is shoe made
with Il stout calfsllin vamp. seamless,
underlying which is vamp of thin
rubber, and between it and the lining,
which is of stout canvas. The bottom
of the shoes has a rubber interlining
between the outer and inner soles, and
thus the shoe is about as near water
proof as leather shoe can be.
Barrels are now being made OF
hard and soft wood. each alternate
stave being of the soft variety and
slightly thicker than the hard wood
stave. The edges of the slaves are cut
square, and, when placed together to
form the barrel. the outsides are even,
and there is q V-shaped crack between
each stage from top to bottom. In
this arrangement the operation of driv-
ing the hoops forces the edges of the
hard slaves into the soft ones until the
cracks are closed, and the extra thick
ness of the latter causes its inner edges
to lap over those of the hard wood
slaves, thus making the joint doubly
secure.
In some recent scientific expert
ments on the effects of cold, two frog.
were frozen solid in u temperature OF
about 900 F., and kept in that con.
dition for half an hoGr. On thawine
slowly they recovered perfectly, but il
was found that large periods of exposure
invariably killed the animals. The ex.
pertinent was tried of freezing hermet.
ically sealed meat, so as to kill its
bacterial organisms, and thus render il
incapable of putrefying. 1t was found,
however. that so low u temperature as
800 below zero would not destroy the
vitality of micro-organisms. 1t wa:
thus made clear that the attempts to
preserve meat for long time by O
momentary freezing of it must be
| aha ndOnpl