Savannah morning news. [volume] (Savannah) 1868-1887, 1886-02-15
POPULAR SCIENCE.

According to NJ. Jehu liquid paraffine
readily dissolves per cent. OF iodine,
forming violet, solution.
In dealing recently with an analysis of
chrysotile, Terrell brought to light the
fact that the silica resulting from the de-
composition of chrysotile by boiling acids
retains the original fbrOus form Of the
mineral.
When water previously filtered is in
troduced into cylinder and saturated
with oxygen at pressure of 294 pounds
all the organic matters are destroyed and
the water is reduced to coalition Of per-
feet purity.
1t is said that 'EmineraP water manu-
facturers are now availing themselves of
the advantages TO be derived from the
use of glvcerine in the preparation Of the
liquors, flaVors, ETC., which are so much
in request in beverages.
J. Dechant on tlltering mercury through
a Plaundler's apparatus perceived well
marked development Of electricity. On
pouring the mercury into another vessel
his fingers happening to touch the stream
he received very smart shock.
In the Cant electro-motor the central
part is drum constructed OF metal Or
wood, with as little weight as possible.
The conducting wires from the pole re-
vel Gel W VIC hlAldbhlG AEAb al Z AiiHiAA6
the drum. The immature magnets are bar
electromagnetic laid parallel wit the axis,
and connected throughout.
A cement for marble is made by stirring
to thick batter with silicates Of soda
twelves parts Portland cement, six parts
Stacked lime, six parts fine lead, and one
part infusorial earth. tits excellent also
for uniting alabaster. Tie object TO be
joined need not be heated. After "a hours
the fracture is firm, and the place where
the union was effected can scarcely be
discovered.
1t is reported that an air balloon rail
way is about TO be constructed on the
Gaisberg, near Salzburg, mountain OF no
great height, but offering a magnificent
view over the beautiful neighOrhoOd of the
town. The balloon, which will have
groOved wheels on one side OF its car, will
ascend perpendicular line Of rails, con-
structed on the principle of the wire rope
railway proposed years ago for the Righn
but never carried into effect.
Some time ago it was stated that an
ozOnOmetric paper could be used with eff
feet in determining the presence OF GER
tain diseases in the atmosphere. MN.
Bornis and Daniels, however, from obser-
vatlOns conducted on the Senegal durin <
five years, conclude that there is no rela-
ton between the indications of this paper
and the intensity OF bilious and yellow
fevers. The simple fact is that the reaction
on the paper is slight when the air is dry
and intense when the air is moist.
In the lecture room experiments on
color mixtures the apparatus employed
by Capt. Abney is a modification OF Max
Wells color box. Instead Of being formed
on a screen the spectrum is received
upon convex lens which forms an image
" r..
If all the light from the prism falls upon
the lens this image is colOrless, but by
interpOsing a screen with a slit in the
spectrum close to the lens, so as to allow
only light of given color TO fall on the
lens, the image appears cOlored with that
light. BY using two or more Sits different
lights may be mixed in any required pro-
portions.
A process Of prophyIaetic incubation
against plenetiC or Charlton fever has
been introduced to the notice of the
Acadamy OF Sciences, Paris, by NJ. a.
Chauveau. The popularity of the pro-
cess consists in the method adopted for
the cultivated virus, which is affected by
means OF compressed oxygen. Three
points are claimed to be established for
this process. FIRST, that il sufices 10 in
Oculate animals single time in order
efficiently 10 protect them from expert
mental NEGOTIATIONS with unattenuated
virus and from the effects Of spontaneous
cOntagion; second, that the virus atten-
uated by means Of compressed oxygen is
as harmless as that obtained by other
methods aud constituting what ia known
as the first charbOn vaccine, and. third,
that the most attenuated virus continues
still active and serviceable long after its
preparation.
Technical education bias been defined by
Mr.. Henry Cunyngham to mean instruc-
ti0n in the art OF applying the discoveries
OF science TO the requirements Of modern
industry II is not scientific teaching in
the strict sense, nor, on the other hand, is
il mere craftsmanship. To make an ex-
ample. the mode Of treatment Of electri-
cal subjects given in the works Of the
late Prof. Clarke Maxwell is purely
scientific and mathematical; in his hands
electricity Is an applied mathematical
science. In the hands of Faraday
electricity becomes an experimental
science. But neither the teachings Of
Faraday nor Of Maxwell IL OF exactly the
kind that is suitable for a mechanic.
Something more practical is needed; the
body OF truth must be arranged with a
view rather to action than to knowledge.
This requires a bent Of mind that is mid
way between science and crSt--it is the
liberal part Of the education OF an artisan.
We require manual deXterity guided by
wide views and scientific knowledge.