Herald and tribune. [volume] (Jonesborough, Tenn.) 1869-current, 1886-10-14
SCIENTIFIC

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no vacuum in the globe has been in
vented in Germany. The wire used is
a mixture of conducting and non-con-
ducting elements, the latter preventing
the former from melting.
tits great mistake to clean brass
articles with acid, as they very soon be-
come dull after such treatment. Sweet
oil and putty powder, followed by soap
and water, is one of the best mediums
for Frightening brass and copper.
To chip smooth after the chip has
been started, the chisel should always
be held at the same angle at which the
chip was started, and every blow of the
hammer should be as near alike as pos
sible; then, with common sense and
practice, person can chip nearly as
smooth as he can file.
According to Wright, many Of the
finer grades of transparent soap sold
in England do not contain glycerine, as
advertised, but sugar. Sugar seems
just as well adapted to making trans
parent soaps as glycerine. AS sugar is
admitted into England free Of duty,
and is hence very cheap, this applica-
tion Of it becomes possible.
The improvements which have been
made of late in the mode of discharg-
ing torpedoes by means of electrical
apparatus have greatly conduced to
far higher degree of precision being
attained, and with still further devel-
opments in this direction there can be
little doubt that almost perfect exacti-
tude will ultimately be reached.
German photographers have sue
ceeded in photographing projectile in
the course of its flight, and some of
those photographs show the head of
condensed air which precedes every
shot. 1t is said to be this "head
which prevents even skillful rilemen
from hitting an empty egg-shell when
hung on long thread The air blows
the shell out of the way of the bullet.
The temperature at which the COM
mon gases become liquefed are given
as follows by Professor Dewar, the num-
bers expressing degrees below zero
Fahrenheit: Carbonic acid, 112 deg;
nitrous oxide, 100 deg; ethylene, the
chief Illuminating constituent of COM
mon coal gas, 154 deg; oxygen, 299 deg;
nitrogen, 232 deg; air. ai4: ,carbonic.
oxide, S151S deg.
I Some one suggests that trees after
transplanting may be kept alive by
burying row of flower pots filled with
water around the body and over the
trees. The moisture which will perco
late through the bottom and sides of
he pots win be so gradual that two
! lion ones will hold enough so as NJ
] , require reIiliing for some time, art
Che roots will be kept moist till such
time as they begin to sprout afresh
Mr.. Edward Atkinson has invented
a new process and new apparatus for
cooking, which he gives to the public.
The theory of it is based upon the non
copducting properties of certain mate
rials with which the oven may be en-
cased. A pine-wood box thus prepared
and lined with metal is partly filled
with water and in this are placed the
cooking vessels, a safety valve being
provided for the escape of steam. The
heat used is derived from common
i kerosene lamp or gas burner.
The spectroscope-capable of 'indi-
eating the millionth part of milligram
of sodium-has been regarded. as The
most delicate Of all analysis. Its keen.
ness proves to be far surpassed, how
ever, by that of the sense Of smell, late
European Investigations having shown
that the nerves of the nose'a are sensibly
affected by one 100000 ,0OOth part of
milligram of mercaptan, milligran
being only Ol54 of grain. And |
such be the delicacy of human smell
what must be the minuteness Of tn
smallest particle which may produc
an impression on the nose of a dog.
The Norwegian Meteorological Inst
. tution,of Christiania has adopted a
, ingenious plan for disseminating it
!. weather reports among the farmer
, fishermen, etc. Thus, on the brake
!, every train departing from the capiti
: to any part of the country after thre
P. NJ, q signal is exhibited indicatin
: the weather to be expected for the Ell
: suing twenty-four hours. These si
!, nails are very simple, consisting Of rt
: and white triangles, squares, and ball
each of which, or several combine
have their meaning; white ball, 4
v instance, "Fine weather." etc. The
4 signals will also bedisplayed from y
# masts of several coasting steamers.
g A Simple Remedy for Biliousness.
er The way to get the better of the bil
$, GUS system without blue pills or quinn
4 is to take the juice of one, two, or thr
". lemons, as appetite Graves, in as mu,
TX water as itmakes pleasant to drink wit
ia out sugar, before going to bed. In t
On morning, on rising, at least half an no
before breakfast, take the juice of O
oe lemon in goblet of water. This W
clear the system Of humor and bile wi
to efficiency, without any of the weakeni
no effects of calomel. People should 4
"a irritate the stomach by eating lemo
M clear; the powerful acid of the Jul
,ca which is always most corrosive, inva
ad ably produces Inflammation soon aft
he but, properly diluted, so that 1t docs !
a. burn or draw the throat, itdoes its me