Sacramento daily record-union. [volume] (Sacramento [Calif.]) 1875-1891, 1883-04-28
SCIENTIFIC.

A German chemist has discovered that
glue, when mixed with one fourth part
glycerine, is given an elasticity and a plia.
bility which prevent its cracking when dry.
Careful analysis of the London fogs, made
by the Royal Society, show that they hold
in suspension two and half times the
quantity of carbonic acid to be found in a
clear atmosphere.
DIR. R. ]. Gatling, of Hartford, the emf.
nent inventor, has patented an arrange
ment by which he is enabled to fire his gun
at any elevation. This is considered one
of the most remarkable achievements of
gunnery.
NJ. Vignier believes that animals are in
debted for the powers of direction which
they sometimes manifest so strikingly to
the possession of . magnetic sense relating
to the force that govern both the direction
and the inclination of the needle, the seat
of which he locates in the semicircular ca
mails of the internal ear.
Without nitric acid none of these explo-
sives can be made, and it cannot be pro-
duced on small scale. If, therefore, any
control could be exercised over the manufact-
urers of this compound, it might, perhaps.
be possible to render the production of
these explosives by individuals difficult.
At present, carboys of nitric acid are sold
as an ordinary staple of trade.
Articles which have been formerly glued,
but broken again at the old place, should
be thoroughly cleansed of all dirt and old
glue by being soaked in hot water, using q
sponge for sthe purpose. Do not attempt
- ,,ro No If tba oId ,tar,,1 - &ba x.oo,n
will no longer fit together. Dry the pieces
thoroughly, warm the joints, reglue them,
and you can be sure they will stick.
The staining of bricks red is effected by
melting one ounce of glue in gallon OF
water, then adding piece of alum as large
as an egg, one.half pound of Venetian red
and one pound of Spanish brown; redness
or darkness is increased by using more red
or brown. For coloring black, heat the
bricks and dip in fluid asphaltum CT in a
hot mixture of linseed oil and asphalt.
The electric light is likely to render val
liable service to submarine operations, as
in examination of wrecks, etc. The appa-
ratus giving the best results is that devised
by M. Bazin. A powerful regulator is in.
closed in cylinder having glass plate be.
low and reflector above, which gives
bright illumination of circular space at
light extends much further.
In the making of what are called safety
envelopes, that part of the envelope covered
by the flap is treated with a solution of
chronic acid and ammonia, sulphate of
copper and fine white paper. The flap
itself is coated with solution of isinglass
in acetic acid, and when this is moistened
and pressed down on the under part of the
envelope, solid cement is formed, entirely
insoluable in acids, alkalies, hot or cold
water, or steam.
The Archaeological Society of Athens,
which is composed Of distinguished savants
resident in this capital, opened here to-day
an exhibition containing splendid collec.
ton of ancient vases, pottery, geld and
silver jewelry, and precious coins, consid.
cradle proportion. of the objects being now
on view for the first time. There is an
other hall, which will be- shortly opened,
containing numerous articles of terra Gotta,
bronze, copper and an interesting collec.
tion of objects in glass and alabaster.
and measures, as well as number Of skulls,
all recently dug up ON the site of the an
Gent city of Cherou@s, in Betia. The
latter are those of soldiers killed in battle
at the time of Philip of Macedon. The So
ciety possesses $500 vases, many Of which
are unique in point of size and beauty, pre-
serving the remains of the original paint
ings, ornaments and interesting inscrip-
tions. The objects belonging to the society
are mostly of the best ancient epochs. The
exhibition, which is methodically arranged
in chronological order in the various classes
of objects, reflects great credit on the in
telligence and zeal of the members, the
more SO as the means at their command
have been very limited. Il London Standard.