New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1854-03-23

which he sscribes 10 the large amount % Pi cen' o.
Mons Viclette has found that the carbonzation Of
WOOD. effected by means of hot steam commences at
$50 deg but that cea gets irabie ana suited ior the
n,anufseture Of the finer qualities OF gunp0wder only
yten Tho .eupercture Of the steam reaches 80 deg
Al RIO deg the coal becomes black but az LOU and
500 deg IL gets very black exceedingly compact and
very slightly infammsbe caTbonesed Az The temPera-
tnre When blsns nelts il get. so hard that it is diff
erit ., hreak II il has q metallic sound, and .
tnrn g. soon az il is removed from the f. r. can.
die: itis then Ike anthracite 20 deg Al Der cent
sfcharcoal is obtained AZ the hishest degree Of ten
perature II YES only IS per cent. Slow carboniza
ten ,,locuces more charcoal than rapid one. The
coal obtained at 210 deg contains 20 per cent carbon,
81 water and &c hydrogen. Charcoal produced at
$50 deg aud suited for common cannon powder, con-
,aius Il OF aiboH 20 Of water and : OF hydrogen.
Prom tia; degree up TO 500 deg there Is no more wa
Ter found in the coal and only few traces Of hydrogen
Wien the steam is admitted mo the re;ort containing
weed he was enabled TO produce at 422 deg charcoal
az The same nature as coal carbonated az 2DJ deg
The steam assists the decomposition oil the wood and
carries off All the volatile substances. In closed re-
forts wood becomes almost iuslbe, resembling stone
coal but differing from il only in its composition In
coser retoris al temperature OF 10 deg the same
Kind of coal nay be obtained in common way az
go deg Tie absorption Of moisture by coal dimin-
isles in proportion TO the temperature employed IN Us
carbonzaioD, but ts power OF conducting neat groWs
mower ofcoBductng electricity il also much increased
b. higher temperature and the electric light more
Brilliant In proportion tie density Of coal Increases
the facility Of burning decreases Coal obtained at
low degree Ct heat is more nhammabie than that car
bonized at higher degree. While coal obtained az
low degree Of heat burns At $40 deg coal Tor anu,
milton powder requires so deg. coal made at lvVo
and 200 deg burn. only upon lin heated to cherry
red heat sulphur burns onl! at $50 deg, bat it oc-
casions the defsgratiOn of salipeter at AZ deg
while coal produces il at $50 deg. Thus in burning
YOUR powder il is the sulphur which hrst takes ire
il icnes the coal which il IFS turn communicates ire
to tie saltpeter. 70.
AT one Of the last meetings Of the Academy Of Sci
ence At Brussels Coord CTahoz communicated the OBJ
,eryaon of " Ilorimond Professor of Natural Phios
ophy al Iouyain Oh the OF cast iron for magnets
Tie professor TAKES bar Of gray cast IRON, when
he brings TO red heat and then sprinheS it on both
,des Of of its whole length with prass'afe Of pOass'G
and puts it then in cold water and when cooled II Is
macnetized with a strong electro magnet II may be
also used for horse.sh magnets.
- We have to notice another cttemPt to supercede
the jacquard loom. Messrs. Bonami, Freyman and
Angus, BuTat Of Roubax have, according to the L,5et
of Lille invented loom, by means Of which figured
goods can be woven without paste board patterns Mr
Bonelli is about TO experiment with his electric loom
before the roy al family of Piedmont.