New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1874-01-31

manent diminution of diameter. and in the second
operation similar effect is produced on the other
half by these two operations an interior diameter
OF "a inches, can be reduced an inch, and oy
four operations an inch. The method gwen rs not
confined TO tires. an instance being given where
ring of Bessemer steel, to be used "a habge-rinR;
had been entirely misshaped by an inexperienced
workman, and was drawn into shape by heating 10
times, and cooling different portions.
IMPROVED PROCESS OF MAKING ALKAu.-The
usual method of manufacturing alkali by what is
called the Leblanc process consists in decom-
posing common salt with sulphuric acid, roasting
the resulting sulphate of soda, technically known
as salt-cake with an adnixture of ground coke ana
limestone and subjecting the crude mass thus o.
tanned to certain refining operations. III Is now
stated, on the authority of Rudolph Wagner that
an entirely new method has been elaborated, Veri-
fed, and is about to be introduced on large seaie
simultaneously in England, Austria, and Germany
Common salt in solution is mixed with picar
Donate of ammonia; the result is blcaroona'e VI
soda which crystaizes out, and chloride Oh
ammonium lsal ammoniacl. which remains In So
luton. The latter liquid is distilled along Win
limestone the result being carbonate OF ammonia
which is collected, and chloride of calcium, which
remains in solution Meantime the blcarooha'e Oh
soda or such part of il as is not required TO De sou
as such. is furnaccd, and thus converted into dry
carbonate OF SOFA. or SOFA ASH III
loses half its carbonic acid winch, being leu mo
the bicarbonate of ammonia, is ready to use along
with fresh lot of salt The only materials Ihus
consumed will be common salt ana chalk, or llIe-
stone and the only refuse yielded VIII he chiorlde
of calcium which is not incapable of being utllzed.
The stock Of bcarbonae of ammonia VIII olrcniate
with a waste. which. in case OF careful worhlhg'
will be ncOnsideTabe. - ,,
The soda-ash produced will he very strong and
pure free from alkaline sulphatcs, sulphitcS. snlph
idos and hyposnlphtes as well as from variety OF
other foreign matters rarely absent. Soda
CRYSTALS viii be made as at present, Dy dlsS0'ihe
soda-ash in water, aud allowing 1t to crysallZe NJ
he proper degree of concentration ana OF teinpera-
tnre. CaustC soda now prepared from certain resi-
dual liquors, technically known rs red liquor
will have again to he made by the prlnltlyc
method of treating solutions of carbonate OF soda
with slaked lime. The nuisanceS OF hydIochloIic
sulphuric and arsencal fumes, will cease. Vat
waste will no longer be formed aud the ingenious
process of obtaining from If hypoSulphlte or SOFA
and for recovering the sulphur 1t CONTAINS VIII
come 10 an end. :,
This new process, according TO Iron, Is hkely 10
involve % heavy fan in the price ot sulphur ana
sulphur ores, such as iron pyrltes, some OF WHICH,
especially such as are poor IN sulphur or Tch III
arsenic may possibly become unstable Inc sup,
ply of sulphuric acid will probably be diminished
and the price increased. Hydrochlouc acid now
waste and difficult TO get rid of VIII be utilized anu
probably rise in price a. well as bleachlng-Inne
and all substances whose manufacture requires the
use of this acid. If commercial success, according
to the authority indicated, chemical manufactures
will undergo such change as has rarely before
been witnessed.