The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1885-1921, 1902-01-01


rollers, and evening out an irregular
feed of the cane. The result obtained is
not so much marked by an increased
extraction in the mills, it is by in
creasing the capacity from 20 to 80 per
cent, and securing regularity of feed,
the great point in milling.
A modern mill consists therefore of
eleven rollers through which the cane
passes, getting seven crushings. The
bagasse escapes finely divided and is
fed automatically to the furnaces, and
with a moisture content of about %
per cent it burns freely, and furnishes
ample steam for all sugar house work
and II to IS per cent of hot maceration
water can be applied to the partly
ground cane between the mills, greatly
assisting the sugar extraction.
Owing to the perfect chemical sugar
house control now established in all
the new modern sugar houses, we are
able to determine exactly what results
are obtained in such a milling plant.
The following figures are computed
from the average results obtained in
some of the large plantations on Oahu
using artificial irrigation and having
cane of the following comparison:
CANE.
1872 per cent fibre.
10. per cent pure sugar.
1913 per cent water and impurities.
EXTRACTION
80 0S6 per cent of total sugar in cane.
S2.4 per cent juice of weight of cane.
1897 per cent pure sugar of weight of
cane.
BAGASSE.
22.46 per cent of weight of cane.
1.033 per cent pure sugar of weight of
1929 per cent water of weight of ba-
gasse.
Let us see what these figures mean.
1897 per cent sugar extraction and 1.033
per cent sugar lost in bagasse added
gives Is per cent sugar as the total Z
amount contained in the cane. Suppos- 9
ing, as in the former case, that we I
grind 1000 tons of cane in "a hours, we ,
enter $50 tons pure sugar with the cane
into the mills; and of this 1897 tons of :
pure sugar is extracted and goes to the +
boiling house, and 1888 tons pure SUI
gar is carried with the bagasse into :
the furnaces and lost
These 1898 tons of sugar, if recov-
cred, would perhaps produce 9.3 tons y
commercial sugar, and this at $4,000 per :
ton represents an actual loss of $55S 90 =
per day, grinding "a hours and LOCO tons :
)t cane consumed. AS the daily loss in
he former 7-roller mill was found to be r
$4,000 per day, during the best pos \
5ible work under the same conditions, =
We have gained daily $4,000 by the in
PRODUCTION of the Stroller mill. ;,
1t may shock the sugar-interested -
'eader to consider that in a sugar :,
house making 10000 tons of sugar in a .
'cason of 155 grinding days using for a
his $4,000 tons of cane, sS6. 49O worth \
in, he &c cit n
n the furnaces, but it may be a con- n
olation for them to know, that at least 81
81 $50 more would have been lost, if II
his crop had to be ground in the for o
ler 7-roller milling plant. ~
Sugar people in Louisiana and Cuba &C
ave on occasions argued with the az
yriter that but small benefit was de- a,
wed from a third mill, and that in q
heir opinion two Stroller mills and r.
ane crusher would extract from the in
ane, all the sugar possible to OBJ it
ain by means of milling. 1t may w
l this connection be interesting to hi
ote the following ease which well f
the use of the third mill. B
It Eva mill the shaft once broke in ac
ne of the rollers of the third mill. For
days they We're grinding with but Is
lie two first mills, until the new roller r
rived. While grinding with all the al
lree mills, the bagasse contained 1.053 c.;
ar cent sugar of weight of cane, but fir
lille grinding with two mills only the ed
agasse contained 1865 per cent sugar H
weight of cane. The loss was there te
re 1865 less 1.053 equals .612 per cent as
sugar of weight of cane, and as eli
,007 tons of cane had been ground ar
uring the 10 days, the total loss of 70
IRE sugar was 91.04 tons, which would dc
ave produced about IS tons of COM ia
ercial sugar and would at $50 90 per w;