The Cairo bulletin. [volume] (Cairo, Ill.) 1872-1878, 1878-02-02
Artificial Ice.

The manufacture OF Ice by chemical
process Is subject which has attracted
the attention Of many inventors Of late
years.
A large number of machines has been
brought before The public, and. no doubt,
some of them will be found both useful
and profitable in southern elm ties, but
it 10 hardly likely that any will be en-
ployed In our Latitude where nature
usuail pordutUs good article and plen,y
VI 1t Without cost.
The following description OF an ice
machine, from The Boston Herald, may
be vi interest:
ut would Seem as II Jack Eros. would
have " LOOK out Tor his laur,ls iM Inc
way Of Ice making II ali liic claims vi
| those WHO haye inveuleu uacililes to
make Ice artificlaily are allowed. One vi
the latest, AMI IL Is claimed the best, Ice
making Iuacn,nes Is All Euxiish invention,
known as lteece's patent. In this nIa-
chine the retrlgerating agent eIupIoyed is
anmoniu. There are three essential
points OH which the efficacy Of a reinger-
aliug agent depends-ylz, first, tie TEN.
peraturc at which IL eyaporates: second.
the tension OF It's yapor III equal teinpera-
lures; third, the amount OF heat IL is
capable OF absorbing and making latent.
In each OF these points, the inventor
says, ammonia j. incomparably superior
TO either sulphurous acid OF ether.
Ammonia has an advantage of la3 de.
grees OF temperature over ether, AZ over
sulphurops acid. The tension of the
vapors of each at 100 degrees Fair. is -
Ether. 34- inches; sulphurous acid, 10
inches: ammonia, 450 inches. TIE latent
heat of each IN heat units is as follows
Ether, 1873 degrees; sulphurOns acid,
about l72 degrees; ammonia 900 de-
grees. Ammonia has thus the advantage
OF more than 700 heat units over each of
the other agents, and has not any Of the
dangerous inilammability attached to The
employment OF ether, and is very much
cheaper. Neither does ammonia decom.
pose when exposed TO the dir, nor chem>
lcally Combine with It. In the working
OF the ammonia machine air is expelled
by creating a slight pressure after the
ammonia is put in, which drives all the
air o1t. In either an ether or sulphur>
Gus acid machine it is necessary to first
obtain vacuum in them. which Is very
often work OF great difficulty. Air dc :.
composes both ether and suphurous
acid, and as both these machines work
with vacuum it Is impossible to keep
all air out.
But perhaps the most important and
interesting feature IN Recess machine. IL
Is claimed, is the simplicity with which it
Is worked. II consists OF four essential
parts-a boiler containing q solution OF
ammonia In water; distilling apparatus
! tor taking over the yapor of amoniu.
which Is liqullied by It's own pressure
when pumped INFO suitable receiver a
cooling cylinder containing coil OF
pipes. through which a solution of chic.
ride OF Observation-Disclosures, which
can be cooled down TO as much us fifty
degrees below zero, still remaining fluid,
and, lastly, a bath Into which this LIQUID
passes, and which contains the pure
water to be frozen. 1t will be seen that
ammonia liquties by its own pressure,
and IL again becomes gaseous simply BY
that pressure being removed. The action
OF the machine. It Is SAID, Is also automatic
and continuous. ana no motive power Is
required beyond that which Is sufficient
70 work small pump for keeping the
liquids In circulation. The ice Ia rem
dtred clear az crystal by the action Of an
apparatus which keeps up slight but con.
| nj mi In
formation OF ice, thus dissipaiing the air,
II Is claimed that Reece machine will
produce ten tons OF clear ice IN ~ hours,
at cost In England OF five shillinps
81 25l per ton. II this is 40. then the
days OF the old.fashione0 ice business are
numbered. IA cooling machine for brew.
cries Is also made on the same patent.
This machine Ia to be introduced INTO
this country. China, India, and other
parts OF the world.