, 1875-01-02
The "AVIS"
Is PUBLISHED
EVERY. WEDNESDAY AND SATURDAY.
EXTRACTS FROM A REPORT MADE
BY RICHARD HENRY BURTON.
Commissioned from Porto RICO TO vsslt tie
"Uames'' or Central Sngar Factories
Of Martinique 1872.
Concluded

Filtration through animal charcoal is tedi-
Gus and expensive operation, but is absolutely
necessary in Factories using the " Triple Effet."
Lareinty was supplied with 130, 900 kilogram-
mes-286,6 900 TBS at a cost of thirty five francs
the 100 k~ilogrammes they consider during
crop in ASKING and returning they lose one
third of the quantity employed they purchased
annually 10000 kilogrammes. This is pur-
chased each year on account of general ex-
penses, and in taking the inventory after crop
they estimate their stock on hand at two-thirds
it's cost price.
Each filter holds about 1900 kills. Of char
1927 lbs. or a value of about g25 stg.
After filtration the charcoal is carried to a
wash box about eleven feet long, by two feet
wide, and sixteen inches deep, in which rotates
a screw, the charcoal is thrown in at the lower
end, and a stream of water is admitted at the
upper the rotation of the screw draws up the
charcoal against the current, and, revolving it
ten times in its progress, removes impurities.
Some Directors consider two washings neceSsa-
ry, and have two machines one placed some
what above the other, the water used must be
very pure. otherwise the pores of the char fill
soon with lime; after washing and draining,
the char is placed in a steam bath, and from
thence to the retorts for returning. Great care
" 4QS 10 hAOh AA VAAlN OPStHDANAp pCNh - ~"
ing it to the proper temperature, and in cooling
it afterwards; if exposed too suddenly to the
air it turns Of a whltish colour like bone, and
loses its fltering properties.
After the first filtration the fIhice is concentra-
ted to strip in the Triple Efet." At La
reinty there are two sets, they consist each of
three vertical vacuum pans, six feet, seven feet,
and eight diameter respectively; they can each
work off about 2 5000 gallons of juice to strip
$50 30. in ten hours, and are worked by double
action horizontal air pumps. The process is
tedious and requires great attention on the part
of the person In charge. The advantages of
the Triple Effet' process are, as this inter-
mediate process of concentration can be done
by steam, it permits the green megass. as it
comes from the mill to be consumed under the
boilers, thus avoiding megass yards, and al
lowing work to be carried on in all weathers.
Gould the Concretor, Mr.. AIRED Flyers pro-
cess" admit of q similar mode of d~isposing
of at once the green megass | should consider
it a superior process. Having had the process
of the "Tliple Efet" explained by Mr..
Tulasne, Calls agent In Habana, / was inclin-
ed to be enthusiastic in It's favor. 1t struck
me it must be the true link required in sugar
making. On the subject of Qualification | had
had too much practice for doubt the vacuum
pan for concentration from strip to grain
I had worked and knew it's advantages; it was
the intermediate process that always was a
stumbling block, coupling it as it should be
with the subject of consuming the green
megass as it leaves the mill, open steam pans
are too slow a process, the sugar darkens; but
I was thoroughly disappointed with the
Triple Efet,' it is expensive, cumbersome,
difficult to manage, tedious, and the advan-
tages Of boiling in vaeuo are destroyed and
glucose formed in the sugar owing to the time
taken in performing the operation.
The Triple Efets has been in use in the
Beet Root Factories many years. Pecquer
in 1910, Rlleux in 1s45, Tischhein in 1S49,
Gail in 1850, Robert in 1851, and finally Gail
improved on Roberts patent; and his agents
introduced this apparatus in the West Indies.
The steam from the first is completely con-
densed by the second, and the steam from this
heats the third pan, and in this alone is there
a complete vacuum although an invention
worthy of o~ommendason it does not produce
in cane sugar making the complete results one
is led to exposition it. in the intermediate
process Of contamination to strip; a rapid
so