The Penn's Grove record., 1889-06-29

syringeful Of strong solution OF
ammonia under the skin of the arm or
other convenient portion OF the
body. II the body he not dead-if
there be the ~faintest circulation-the
ammonia will produce on the skin, |
oyeo the point where it was injected, q
bright red patch, on the surface of
which raised red spots will appear; bit
IL theie be absolute death, there VIII
be produced a brown dark blotch, which
is definitely conclusive against any
possible vitality.
M. Cornu, a French scientist, re-
expressed the opinion in the
Academy of Sciences that the light
emitted by the shooting stars is not due
to confederation or to the heat OF
impact. In those high regions, he said, |
our atmosphere is too unsubstantial to
render the explanation satisfactory. 1t Is
much more probable that the phenome-
non is one of static electricity developed
by simple friction, and it is well known
that rareiied gases a be made to
glow intensely with but very little
electric fluid.
-~
Among the ''paradoxes OF science"
BldckWood's Magazfne mentions the
fact that water, which will allay
thirst, augments 1t when CONCEALED
into snow; so that it is stated by Arc
tic explorers that the natives prefer en-
during the utmost extremity of thirst
rather than attempt to remove it by
eating snow. Yet, II the snow is
melted, it becomes drinkable water.
while ice, which melts mor slowly
than snow in the mouth, Is very eff
Gent in allaying thirst.
Most persons who have walked On a
railway track have observed how much
rustier rails that are infrequently used
are than those in constant service. A
French scientist thinks he has found
an explanation of this phenomenon IN
the fact that when . mixture Of iron
rust and iron is submitted to great
pressure the magnetic oxide Of iron Is
formed. In the case of rails in COR
slant use he thinks that a superficial
coating of magnetic oxide is formed by
the compression OF the rust on the
metal by the passage of trains.
N. Ungerer, a French scientist, be-
1ieves that flowers and the perfumes
distilled from them have . salutary
influence on the consultation, and,
indeed, may be regarded as q thera-
peutic agency of high value. He says
that residence in q perfumed atmos-
phtre forms a protection from pulmo-
nary affections and arrests the develop
ment of phthisis. He adds that in the
town Of La Grasse, where the making
of perfumes is largely carried on, phthi-
sis is rare, thanks to the 0dorous
vapors exhaled from the many dis
tilleries.
An electric theodOlite, giving hidden
gunners the exact distance and direc-
ton Of an enemy's vesselsEwhetbtr
stationary or moving-has been set up
at Maddalena. Italy, where a battery
protects the island Of Caprera. From
behind a hilton which is placed the
electric apparatus-the gunners are
GRABBED to fire with the utmost pre-
cislon, while any effective return fire is
prevented by the inability Of the foe to
Ok the location of the invisible guns.
Mr.. q. Y. Boys has discovered that
quartz has remarkable insulating quail
tiles. The detection of q small pair Of
electrified gold leaves fell emily one
fourth after a suspension of five hours
from a quartz rod in a moist atmos-
pl.ere, though a clean glass rod under
he same conditions would discharge
leaves in n few seconds.
An automatic toll taking device has
been invented TO DO attached to tele-
phones at public or pay stations. The
mechanism in the telephone box Is so
arranged that the telephone will not
operate until a coin Of certain size and
weight dropped into q slit In front acts
upon a switch lever, thereby making
electrical connection between the trans
mitter and the line wire. The act OF
hanging the receiving telephone, after
use, in the place lrovided for 1t, drops
the coin into a till and releases the
switch lever, thereby breaking the
electrical connection and "setting the
trap" for the next user.
Il German patent has been granted
to NJ. Ladewigg for a much-needed arti-
ele-a fre-and waterproof paper. 1t
is made by mixing twenty-five parts of
asbestos with twenty-five to thirty parts
of aluminium sulphate, moistening with
zinc chloride, and, after washing, treat
ing the pulp with q solution Of n part
Of rosin soap and eight to ten parts Of
aluminium sulphate. Paper is then
produced as with ordinary pulp.
William Fl. Daafels, Of Chicago,
claims to have discovered q preparation
which will preserve food for any length
of time. 1t consists of q powder, the
chief ingredients Of which are sulpher
and cinnamon. This powder. when
ignited, burns slowly, and articles ex-
posed to its fumes resist decay. One
pound of the powder will preserve Q
ton of meat.
Il 70 pointed out that when much
dust is present In the atmosphere the
heat of the sun Is greatly absorbed,
hence 1t seems probable that dust par
tfcles may aid In the formation of fogs
in another way than by acting as
nuclei.
Professor Bell says that deafness
occurring in childhood Is capable of
complete removal by suitable instruc-
tion in SPECIAL schools.
CoNCEITED.-"Allow me-, madam,
70 congratulate you on your acquaint-
ance with that charming lady" said a
gallant Hungarian; ''she Is young, beau
tiful and intelligent"
"Oh, certainly" replied the lady,
''but don't you think she is q trife con-
ceited?"
''Why, madam, just put yourself In
her place, and, say, would you not be
conceited toor" was the rather startling
comment.
INVISIBLE CoroR.-Professor-Mi-
~croscopical Investigations lead Us to be-
iieye that there are colors too delicate