The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1889-05-18
SCIENCE AND INDUSTRY.


Files can, it is said. be recut by
cleaning them in acidulated water be-
tween two plates of carbon and closing
the circuit so as to form real voltaio
cell.
Ono OF the chief features of the
use of paper fabric for building pur-
poses is the ease with which it can be
worked into sheets of any required
width or thickness that will not be af-
fected by changes of temperature or
humidity.
The Italian Admiralty, as the re-
suit of numerous experiments, have
given orders that henceforth all ex-
posed parts of machinery are to be
fabricated exclusively with castor oil,
while mineral oils are to be used for
cylinder and similar fabrication.
To withdraw an excess OF blood
from the brain, Professor Preyer, of
jena, makes his patient stand with one
arm outstretched until the limb aches
violently. This conducts an excess of
blood to the arm, and seldom fails to
relieve the brain. Medical Bulletin.
-Houzean learned that some ami
mails are capable of measuring time
that particularly interest them. He
says that female crocodiles abandon
their eggs in the sand for ten or fifteen
days, according to the species, and re-
turn to the spot at the exact time when
they are to be hatched.
"A tack machine will make from
25O to 275 tacks per minute. The work,
however, does not end here, as the
tacks are galvanized, timed, polished,
leathered and variety of processes
gone through with before the tack
reaches the packing room. The total
output of tacks in the United States is
800 tons a day, all of which are readily
consumed.
Mr.. Friese Greene, British pho
tographer, has actually produced a
picture with only the light issuing
from his eye. Having stared for fif-
teen seconds at 3000-candle electric
arc only three feet away, he closed his
eye and quickly brought it over sensi-
tive plate at distance of one inch.
The result was very faint but distinct
image of the arc and the carbons, due,
probably, to momentary phosphores-
cence of the retina. A second attempt
failed, and gas lights proved too weak
TO produce effect.
In Dalmatia chrysanthemums are
largely cultivated TO supply the chem
lists with the substance from which the
well-known "Dalmatian insect pow
der is made. The island of Lcsina is
the chief seat of cultivation, and the
flower most generally grown is G. Gin
erariufolium Trev. 1t is said that no
other local crop pays so well, the prod
uct Of a single acre of ground selling
from $500 to $1,000, and the Govern
ment yearly distributes plants at very
low rates in order that the industry
may be still further developed.
The Austrian brentwood furniture
is manufactured of ordinary red beach,
which is very plentiful in Hungary.
The timber is sawed into strips from
an inch and half to two inches square.
and these are turned into round rods,
They are placed in an air-tight case
action of superheated steam, which
makes them so pliable that they can be
bent by hand to the iron patterns,
whore they are secured and left TO dry
for several days, after which they are
ready to be used in the manufacture of
the furniture
The treatment of the insane is
subject which penetrates social and
domestic life to the very core. The
Lancet lays down ''three great desid-
erata in the practical solution of this
problem: l. That the
insane should be conducted to the re-
covery of their proper senses by the
quickest, the most etficacious, and the
most kindly means. ,. That the great
est possible amount of teaching as to
what insanity is in all its relationships
should be got out of the experience
derivable from practical work in con-
nection with the insane. 3. That the
confidence of the public should be es-
tablished in the assurance that every
thing that can be done is being done
for those members of the community
Who are insaneh