The Delaware ledger., 1883-09-22
Scientific.

The whistle Of a locomotive is
heard 1900 yards, the noise of u train
$500 yards, the report of musket and
the bark of dog 1900 yards, the roll of
a drum 100 yards, the croak of frog
900 yards, and cricket's chirp 800
yards.
1t is stated as fact, and is matter
of study for scientists, that the corn and
vegetables planted in the path of the
cyclone of May II will not grow. Farm
ers along the line of its travels in Nor
gan county, declare the statement to be
true, and say that corn and potatoes
planted on "cyclone ground" viii not
even sprout.
1t is curious fact that in the salt
mines of Poland and Hungary the gal.
leries are supported by wooden pillars,
which are found to last unimpaired for
ages, in consequence of being impreg-
mated with salt while pillars of brick
and stone, used for the same purpose,
crumble away in short time by the
decay Of their mortar. 1t is also found
that wooden piles driven into the mud of
salt flats and marshes last for an unlim-
tied time, and are used for the founda-
tion of brick and stone editices and the
practice of docking timber after il has
been seasoned, by immersing it for
some time in sea water, is generally
admitted to be promotive of its durabil-
ity.
To make a rubber lubricator for
belts, five parts of india rubber are cut
fine and melted together with five parts
of turpentine in an iron, well-covered
vessel; then add four parts Of resin,
stir well, melt, and four parts of yellow
wax, stirring constantly while melting,
This mixture while warm is added
with constant stirring, to melted mix
ture of fifteen parts fish oil and five
parts of tallow, and the whole is agita,
tated until it has CONCEALED. The mas,
is applied to old belts upon both side
in warm place, and when the belts ar,
in use from time to time upon thu
other side. BY this treatment they be
come very durable. The South.
Some interesting relics of antiquit!
were lately received at Berlin from
Mayence. They consist of the remain
of piles belonging to the bridge whicl
once led from Castle to Mayence, an,
which is proved tohave been in use fifty
three years before the Christian Ella
The pieces of wood are trunks of vari
GUS trees, including oak, elm and whit
and red beech. Internally they ar
quite sound. At one end there ar
pieces of iron. Some of the wood is t
be devoted to Che manufacture of
piano case. Prince Alexander Of II Hrsse
has had some ornamental pieces q
, furniture made from oak discovered d
the spot referred to, and these article
he has presented to his son, Prime
Alexander, of Bulgaria.
AT Gaudenfrel, Germany, the al
r tist and glass-spinner, A. Prengal, {
: Vienna, has established his glass bus
S ness, offering carpets, cuffs, collars
! wells, ETC., made of glass. He nj
e only spins, but also weaves, glass b,
n fore the eyes of the people. The othel
n wise brittle glass he changes into pl
e able threads, and uses them for maxim
Il good, warm clothing by introducin
e certain ingredients, which are his Sc,
d rets, and thereby changing the entil
e nature of the glass. He makes whit
o curley glass muffs also, ladies' ha 5
y glass, with glass feathers, which al
e lighter than real feathers. Wool mat
/ Of glass, it is said, cannot be distil
guished from the genuine articl
Glass is non conductor, and the tin
, may not be distant when it will cause
= revolution in dress materials.
! The measurement of temperatu
is, as we all know, of extreme impo
:. tance in various chemical and man
: featuring operations. The ordiIial
- mercurial Thermometer will answer f,
- every purpose within certain limit
l., but when it becomes necessary to mea
T. ure the melting point of different Inc
II ais, or the heat given out by differel
~ forms of furnaces or lamps, the the
10 mometer must give place to an instr
20 ment of another form altogethe
"a Hitherto no really satisfactory ms
:, ment has been produced for the eXa
measurement of high temperature
- but Professor Talt at a recent meet il
IN of the Royal Society of Edinbur
= stated that from experiments he hi
- made with those rare metals, iridu
49, and ruthenium, he believed that
: would be able to form from them
- standard thermo electric couple Will
N would answer the required condition
Chambers journal.
nd Sanitary,