Evening bulletin., 1897-12-06

No Progress In Boiling Process Too Much
Attention 10 Extraction Some New
Ideas and Suggestions.

sugar boiler was called to the re
port on manufacture of sugar. As
l have had some practical expert.
ence, both here and iu Germany,
l beg to be allowed to bring some
of my observations to the notice
of interested parties.
In the first place there has
been but little progress made in
the actual manufacture of sugar
in the past tep or twelve years.
The attention of the planters has
been concentrated mostly on the
extraction of cane juice, and the
boiling department has rot kept
pace with the milling. l am glad
to hear that Professor Maxwell
has recommended less maceration;
this has been carried greatly to
excess since the addition of sec
oud and third roller mills. The
juice obtained by high macera
ton we are unable, at the present
state of manufacture, to work to
any advantage into marketable
product. High maceration depre
ciates the sugar considerably in
quality and has not the effect as
supposed to increase the quantity
l know that this statement will
be considered ridiculous by many
manufacturers, but for those it is
very easy to convince themselves.
A test is easily made by running,
say, one week with 4 to 5 per cent.
and the next week with IA t. Is
per cent. maceratic1. or course a
scale is necessary for weighing
the cane to get at the correct fig
ure. Now with low maceration
the mill is running like clock
work; with high maceration there
is little lack of steam, the boil
ing house is crowded-juice that
ought to have been in the effects
40 inmates sooner begins to get
cool, inversion sets in on account
OF the low density, overtime is
made the cooler room gets crowded
and low grade sugars have to be
dried ahead of the proper time, at
sacrifice, to make room for new
lots. At the end of the week we
find our effects have accumulated
more scale aud larger cleaning
force has to be put on Finally
we draw The balauce; we find the
shipping report little lower, aud
the sugar on haud in cooler
columns shows higher; the
polarization is from 0.5 to
O.8 lower; everybody has
worked harder, there has been
more wear to the machinery, and
what have we gainedY
The G in consi- is in 4 t. 5 gal
Ions more Of waste molasses to
the ton of sugar. with consider
ably higher percentage of sugar.
Now every manufactures knows
what a nuisance waste molasse, is.
A market value il has not, under
the pr, sent circumstances Eveu
when applied as fertilizer it is
very doubtful as to its valup there,
because OF its tendency to grow
very rank and impure cane. 1t is
my firm belief that maceration
has to be moderated until the pro,
blem of waste molasses is solved.
1t is true that the yield of sugar
per acre is 30 per cent higher
against former years, but the credit
is mostly due to far better caltiya-
ton of the cane.
Iu +, gard to evaporating effects,
the machinery in use here is fully
as good as that in Germany. The
difference lies chiefly with the
juice. In German factories the
juice is highly clarified and fl
tered before being subjected to
evaporation, and the accumulation
of scale, therefore, but very slight
Besides the water used for
con iersing is alnos, up to freez-
ing point, which quickens the
concentration of the juice con
siderably. 1t has to be admitted
greatly to the credit of the Hawai-
ian planter that he has spent his
money freely for new improve
ments to effect better results. In
regard to the drying of sugar, l
doubt very much that any benefit
could be derived by the appliance
OF blasts or pans, as suggested at
the last meeting, to obviate the
difficulty OF the sugar leaving the
centrifugals too hot. This should
ha cpctiHad at tho .rn a,,..., ,nn,,