The Dillon tribune., 1884-12-06
Mhe niNon lTnbn''e.
SCIENTIFIC NOTES.

y curass made OF q newly invented
preparation Of steel seems to be bullet
proof 1t is three.fitll,s of an inch thick,
is lined with wool, and weighs but two
bounds. OF II ball cartridges fired at rs
yards only two penetrated As far as the
lining.
The Bell fainter discovery was supposed
,oshow that the rapid intermittent Incl.
,;cnc. Of rays of light on disks Of hard
Substances produced sonorous vibrations.
Later Investigations would seem to prove
that the vibrations are caused by heat, not
by light. They are owing to the intu-
encc of degraded heat rays on absorbent
vapors.''
4 scientific man, writing from Florida,
speaks Of the great advantages houses have
there, as we'll as in Souti, Alabama, in be-
ing built upon pillars and having no cell
lars. The cellar atmosphere is Il prolific
source OF disease. and increase by Is per
cent. the risk from malaria Witt, the
houses upon pillars there is always free
circulation Of air beneath.
Holland, England and America use
Farenheits thermometers: Russia and
Germany, Reamurs, and France the Cen
,igrade. In the first the boiling point is
y, degrees above zero. in the second $50
and III the third 100. With this distinction
in mind, it is very easy to bring the three
thermometers ITO harmony il we rc,nem.
her that zero in Reamur and Centiyraae is
:, degrees above zero III Fahrenheit
There are great differences in the aver.
age growth Of some OF the more common
trees. In 1. years white maple increased
foot in diameter and 80 feet in height
ash, leaf maple or box elder, foo: and 20
feet; white willow, IA and 50 feet; yellow
willow, ~ and IS feet; blue and white
ash, 10 inches and IS feet; Lombardy pop.
lar, 10 inches and 40 feet; black walnu,
and butternut, 10 inches and 20 feet.
The University of Gricfswald is in pos
session Of an immense electromagnetic
Twenty. eight iron plates are bent into thu
shape Of horseshoe, and SO connected BY
iron rings as to from cylinder 1875 metre:
in diameter and 1:5 centimetres in heights
It weighs 6,s kilogrammes, and the mag
netising helix Of insulated copper plates
and wires weighs rs kilogrammes. II
two minutes, with fifty small Grove ele
,ncnts, it will fuse in the Forcault expert
ment, 40 gra,nmes Of Woods metal.
In Germany they ate discussing sub
stitute for India rubber which will b
cheaper and serviceable. Sulphur is on
Of the things proposed, not being attacke'
by acids, alkalis and Salts and brittle as
IS, by two MEETINGS it becomes elastic, an
can be rendered soft and capable Of bein
nodded. Alumina soap is also spoken c
as possessing some qualities that ma
make 1t the desired substitute. Necessit
is the mother Of invention, but the elastic
ity Of India rubber will be difficult Of i'm
tation.
a machine has been invented to obvial
the necessity of beating carpets. 1t is
polygonal drum, formed of wooden bar
and fixed on shaft revolving horizontall
1t is +, feet in diameter, 6 feet in lengtl
and is inclosed in a chamber, and is drive
by al Otto gas engine of /. horse powe
which also drives fan for drawing Il
dust from the chamber. The carpets al
placed in the drum, which is fitted wit
internal rollers. and these turn the carp
over AS the drum rcvolvcs. At :. rcvol
lions Il minute from zoo TO 800 squa
yards OF carpet can he cleans:d in an hor