The home journal. (Winchester, Tenn.) 1858-188?, 1880-04-08
SCIENCE AND ART.

THIRTY THREE thousand pound
raised one foot high per minute is tn
equivalent of horse power.
Mr.. CLAUDE BERNARD shows by ex
pertinent that plants, like animals, ma,
be placed under the influence OF ethc
or chloroform.
A DISPATCH from Paris says Elk
periments are making here with tn
polyscope, new apparatus for illuni
mating the interior of animal organism
rendering bodies transparent so as tt
render an examination of every part o.
body feasible. The attention o.
scientists is drawn toward this remark
able discovery"
IT is well known that huoric acid vii
dissolve glass, and the practical execu
ton of etching designs on glass may bt
done as follows: THE article mus
frst receive the drawing by hand, stamp
or by transfer, using as a material an
oily lac mixed with little paint, so as
to show on the glass. This done, dust
over powder made of metal, cOpal, OF
any substance capable of resisting the
acid. When dry dip the glass with the
drawing on it in fluoric acid, or paint it
on, allow it to remain lew seconds,
or until the powder begins to come of,
Then rinse and clean with water, and
your work is completed.
DIR. WERNER SIEMENs and the Ger
man Postmaster General have founded
an Electro-Technical Society in Berlin.
The former stated at meeting last
week that his new electr0dynamic
machine had been so improved by Herr
Won Hefner that it's action is actually
cheaper than the locomotive for short
distances. He proposes, therefore, to
construct light overhead rails, along
which carriages would be propelled by
the new engine, which, as we have above
indicated, has been perfected since it
was shown at the Berlin Industrial
Exhibition. The dynamic engine is also
applicable to locomotives, in order to
increase their tractive power.
Ira small bit of camphor is laid upon
water it beginsturning and moving about
with great rapidity. If few grains of
lycop0dium or other light power have
been previously scattered on the water
they are drawn toward, the camphor by
eddles in an inverse direction. These
phenomena we're observed in l74S by
Romieu. Cassamajor has, says Les
MondeS, resumed the study of the ques-
ton and adopted the views of Romieu.
He instances the following crucial ex
pertinent: At the same time that the bits
of camphor are thrown upon the water
insert q glass rod which has been
rubbed with flannel; the motion i'm
medately stops II the electricity is
removed from the rod by rubbing it
with tinfoil it loses its power of cheek.
ing the eddies.
ONE of the first questions asked by 4
person who looks at a microscope il,
" What is its poweri" and others ask,
" What is the highest power ever
reached?' Oh simple microscopes or
and-glasses, Is they may be termed,
enc sent to the Royal Society of Eng
land, by Di Tarre, of Naples, vas said
to magnify $500 diameteIs 1t was lent
to Baker for trial, but he could make
nothing of it, and states his sight was
seriously injured by trying to use it.
With compound microscopes the highest
power ever reached, so far as we know
is 100, 600 diameters. This was obtained
about ten years ago by DR.. Dickinson,
of New York City. Under such a
power single human blood corpuscle
would be over thirty-six inches in di-
ameter, or the size of a small cart.wheel.
A human hair thus magnited would
rival the giant trees of California, for
it would be over forty feet in diameter.
A fly would appear as monster three
quarters of mile lorg, and claw of a
honey-bee would stretch across the
widest street and clasp the houses on
both sides. OF course, in such case
the whole fly could not be seen under
the microscope, as small part of ore
of the facts of its compound eye would
fill the whole field, so that the "hy !"
would not appear at al. This power
was obtained by artificial means, and
all sharp definition was lost, thus for
real work OF any practical use such a
power when obtained is worthless. The
highest recorded magnifying power of
scientific value was that obtained by DIR.
Lionel Beale, who obtained 10000 d.
ameters with a one eightieth objective.
He uses long tube in preference to
high eyeglasses, and no ampiifier.