The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1888-07-21
SCIENCE AND INDUSTRY.


"A new perfume Is named "Opopoi
max" and Is highly esteemed In ParisI
Il has modified odor OF carrots, and
II chiefly made from that vegetable.
What may be Of great value In
ship-building and matchmaking is the
discovery that steel, mixed with twen-
ty-four per cent. of manganese becomes
non-magnetic.
The fabric known as Chiuese grass
cloth is made from the fiber Of nettles.
The cloth is peculiarly glossy and
transparent, and MS betting for ma
chinery has double the strength OF
leather.
Electric rifles are the latest. In
stead of the ordinary percussion firing
device, dry chloride of silver battery
and a primary coil will, so twas lately
stated before the American Institute,
fire the rifo $4,000 times without re-
charging.
Experiments are being made on
Prussian railroads with axle-boxes fit
ted with bearings of vegetable parch.
ment in place of brass. The claim is
made that these compressed paper
bearings make tough material that is
superior to metal.
According to the Electrical, ReUieW,
medicine may be introduced into the
human system by electricity. The
electrodes of battery are saturated
with the medicine and applied locally
to the skin. Experiments show that
there is an actual absorption of the
medicine into the system.
The "opsiometer' is a new instru-
ment for testing the eyesight. 1t con-
sists of mahogany case with two
front eyeholes, behind which different
lenses are fitted, and the person whose
sight is to be tested looks through the
holes and and lenses at printed matter
behind.
Russian observations have shown
that teeth decay in u quite regular
| order, the lower third molar being the
first attacked, then the upper, then the
lower fourth molar, and so on, the
| lower, incisors and canine teeth being
the last affected. Upper teeth, as a
rule, are more durable than lower,
right than left, those of dark persons
than those of blondes. those OF short
persons than those of the tall.
| Investigations made by Sohneke
have led to the conclusion that the elec-
tricity which is discharged during a
thunder storm is produced by the fric-
tion of water and ice-that is, the ice
is electrified by friction with water;
just before a thunder storm, water
clouds (cumulD and ice clouds (cirri,
cirrosratD appear simultaneously in
the sky, and the friction of these parti-
| cles of ice and water is, according to
shis theory, II sufficient cause of tho
electricity which is generated.
Artificial sponge-rearing is being
| practiced in Styria. From report to
the Austrian Board of Trade it appears
that the "sponge-farmer," by taking
small pieces of living sponge and
planting" them in favorable spots,
has obtained large specimens in the
course of three years. 1t is stated that
1000 sponges cost no more for cultiva-
tion and interest on capital than 225
francs Gorty-five dollars,) and the
Austro-Hungarian Government has
authorized the protection Of this new
industry on the coast of Dalmatia.
1t has been estimated that the walls
of building in which fifty thousand
bricks are used require nearly five
thousand gallons of water in the con-
struction; this being stored in the pores
and spaces of the bricks and mortar
until dispelled in the form of vapor. 1t
can not be too we'll known that until
this large quantity of water is so dis
PEELED, the house is not habitable.
The town of Basle, in Switzerland, has
recently adopted a wise regulation
which forbids the occupation of newly
built houses until four months after
their completion.