The Hawaiian gazette., 1916-10-13

study up on gauges. He also thought
the gauges should be placed nearer the
fre room. This is the chemists job I,
he said. @ AE@
On this subject II. p. Agee thought
one man ought to be put on the carbon
dioxid work and looking after the
gauges as the fuel saved would more
than Offset the, wages pRid. Mr.. Norris
agreed but was doubtful whether the
plantation managers could be made to
see the point. I, XII M & ~, NJ
Alfred Krafft's report on milling
evoked much debate on whether the
purity Of the juice is the same from
all the mills in a train. htsfars a-E
Az Paia g twenty one!roller mill there
Is no drop in purity between the third
and the seventh mill. Mr. Savage told
Of tests he had made in the laboratory
using pressures up 70 lthirty.six tons
per square inch. Mr.. Walker suggest
cd remilling the entire blanket and Mr..
Norris Said that at Eva and Paia this
is done. ,, "A ~
10 There Extraction Limit7 . asa
Chairman Giacometti summarized
the subject, stating that in. practise the
juice samples should be a mixture OF
juices from all the mills Mr.. Norris
doubted the logic Of Mr.. Kraft s re-
port and said IL would pay to get 100
per cent extraction il that were pos
sible. -- @GH1
Mr.. Aston said the limit can'not be
exceeded and Mr. Norris added TINT
the plantations are run to make money
for their owners. at is our business
to put moro sugar in the bags irrespec.
tive of whether chemical difficulties are
created by higher extractions. Chem
list Renton told of six dry crusher tests
made mt Eva during the grinding Of
the lol6,croP. .... : 80 80,
Mr.. Ebeling disagreed with Mr..
Norris and referred TO the alarming in.
l,creesk in the volume of molasses since
high extraction has become the rule.
Under the old 90 to 90 extraction imax-
mum there was an average of twenty
six gallons of amolasseS per ton of sugar
while at 9S-exttaction levels the aver
age IL forty GALLONS If, molasses per
ton of sugar. t... 49,
"Where does that fourteen gallons
OF molasses come FROM" he asked.
tout of the maeeration waterf''
Chairman Giacometti relieved rath-
er tense situation arising between Mr..
Norris and Mr.. Ebeling by suggesting
that both were wrong. "The whole
trouble is that they have taken our
good old I.ahaina cane away from us
and have given us a lot of new fancy
canes and fancy fertilizers" he said.
Mr.. Ebeling said "97.extraetion is
the limit above, which, for adequate
commercial revenues the mills should
not go.
Qualification Again
Horace johnson = report on the clar.
ifleatiOn Of cane juices in the manufac.
ture of raw sugar occupied the entire
afternoon session, He said that no
new methods have been developed dur.
ing 1916. Nevertheless, Qualification is
an extremely important problem which
demands earnest sconsid GRAFTON at the
hands of all those interested in increas.
ing the quality AID quantity of sugar
produced.
"By improved mechanical means and
careful operation the engineers are
now able to extract over ninety-eight
per cent of the total sucrose in tho
cane. This sucrose is turned over TO
the sugar boiler and chemists in tho
form of raw cane juice, having ten to
twenty per cent of impurities with it.
With the present method of treatment
the recovery of ~sucrose in the form Of
raw sugar is respectively ninety two
to eighty-four per cent of the sucroso
in cane. In other words, we lose from
six to fourteen per cent of the sucrose
in cane due to the. impurities in solu,
ton.
Lime Is Standby
"The impurities in the juice enter
ing the boiling house consist Of insolu-
BILE matter as fine cane trash, clay, dirt.
etc, which under present conditions of
milling amount to as much as three.
tenths per cent of the weight of mixed
Juice. The majority of these impuri.
ties settle out with the precipitated
soluble impurities and. are separated
from the clear juice in the mud presses.
Each year sees its quota of new
material and methods proposed where
ny n better Qualification is claimed, but
invariably they gradually fade away,
leaving milk Of lime as the apparently
only economical material for the defe.
cation Of cane juicein the manufacture
If raw sugar.
It Depends on~the Cane
Qualification by means of sodium car.
Donate and soda ash and its effect on
'cale formations was debated pro and
'ontra. 1t developed that there is
wide variation, in the composition Of
the lime scale-which forms in the evap-
orators. The scale may consist of sill,
rates, sulphates,. carbonates and phos
pilates of lime in combination with
iron and aluminium.
The addition of soda compounds
sometimes gives good results and some.
iimes not. Mr.. Duker summed it up
by saying that cit all depends on the
rane." Replying to Mr.. johnson $ in.
quiry as TO how much caustic soda
Should 10. used, Mr.. Ebeling gave the
formula, Zone S00-pound drum in three
weeks in quadruple effect" Mr..
Duker said one drum per cell per
week.
Kieselguhr and Phosphorus
W. X. 0rth thought phOsphoric acid
of very little value for raw juices. It
produces better clarihcation but has
no effect on scale formation which is
really the big problem in the treatment
of Juices, The high cost of the acid is