The Charleston daily news. [volume] (Charleston, S.C.) 1865-1873, 1870-07-18

y. MAKING ICE.-lt seems CQaC au Ice-WahtnS
machine for this city Is In course Of construc-
ton at Norwalk, Conn. The Norwalk Gazette
says:
stThe Vacuum Pump constructed by the Nor
walkaEron Works for making ice with the ma
chine invented by Mr. D. L. Holden, of New
Orleans, has, after several trials, proved Itself
equal to the work. As the process may be In
teresting to our readers, and may serve to
show that the artificial equals, If not surpasses,
the natural ice, we give description of the
same. The machine is operated on the chem
ical principle, that liquids passing Into vapor
absorb heat. Necessity first is to find liquid
which shall itself give off Its vapor at low
temperature. This material has been found
and can be abundantly obtained, being liqnid
formed by fixing the lightest vapor which is
thrown off from petroleum. In refining, either by
pressure or with freezing mixture, around
the condensing COIL This liquid boils or gives
off its.Ysporat 4s deg Fahrenheit, under the
ordinary atmospheric pressure, and removing
the gus, 1t boils at a still lower temperature,
proportioned to the amount Of atmospheric
pressure removed. The liquid Is placed In
rectangular vessels, perfectly air tight, and
strong enough to stand vacuum with
out collapse. To these vessels q pump is at
tadhed, the vapor drawn of as fast as 1t
comes from the liquid, and this action OF
passing from liquor to vapor absorbs the
heat of non-congealable bath in which
the vessels are placed. Into this non-con-
eealable bath there are placed moulds con-
tanning fresh water, the heat of which Is abb
sorbed by the bath, and which, after freezing
are removed and the ice therein thawed out
by immersion In water of ordinary tempera-
ture.s These moulds form Ice two inches thick,
which by simple superposltion adhere to each
Iether; making blocks of ice of any desired
thickness or weight. AS the liquid used pos
sessss the property of absorbing heat at such
low temperatures 1t has been called ''chymo-
genee or the "breeder Of winter" and being
contained necessarily in vessels perfectly air
tight, 1t is Impossible that :sauy impurities
should affect the ewater to be; frozen. As this
water Is thsSsame which persons are accus-
toned ordinarily to use for drinking pur-
poses, 1t is:, even better than the natural
ice, WHICH IL Cdhtu ikVu PoHoo AZ
northern, and, in melting, mixed with
water OF southern latitudssi The pump we
allude to is for manufacturing ice in Charles
ton, s. G., and the party for whom it was
specially constructed hopes ere long to be fur
nishing pure and cheap Ice to the population
of that city. En- possant we may say that it
isclaimed that in New Orleans this commodity
Is cheaper this year by forty per cent than in
New York City, which, owing to the difference
or isothermal lines, seems rather remarkable,
but Is easily accounted for by the statement
that the Ice sold there Is the product Of
machinery. In addition to the vacuum work,
the pump also congresses the gas and causes
1t to liqulfy, so that Of the "chymogene' used
none Is wasted or destroyed" ~
Since the above was put in type our Coium-
,bia correspondent informs us that Mr.. ]. G.
5eeger, OF Columbia, has received an ice ma
chine manufactured in Europe at cost Of
5000.