The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1915-10-22

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A technical paper on uGlucose De-
destinations y was then read by w r..
MeAllop. j. A.tYeret said that rapid
tests were necessary In sugar mills
otherwise they would not be made. r.
8. Norris thought the subject of little
Importance except to those plantations
which sell their molasses to distillers
and III. p. Agee thought that as the
questions involved were legal ones only
Hawaiian chemists should follow z Of
fetal methods. q e u A.&'.5#
A.. Kraft of Honokaa read paper
on t'Curihg and Marketing sthting
that losses between mill and market
have been higher than usual fhis year.
This was denied by II. johnson for the
BrePer plantations, @. II. ,Halden Of
Makaweli, r. 3. Norris and ], r. Fos-
ter. All acknowledged however that
comparisons between laboratory sheets
in The mill and sugar rs weighed into
the refinery are both interesting aud
valuable but that when, chemists got
into this field they were treading on
dangerons ground.
Heating the Molasses r4t-t F
The best method, Of heating molasses
brought ont much difference of opinion,
Norris said IL was a dangerous practise
10 run live steam into the molasses as
81 ontaneous combustion might follow.
W. II. Crozier Of Papaaloa said the
right place to apply the heat was TO
the basket. Renton Hind thought steam
Jackets were the best but the chemists
all said not. ID #.
GIL, Halden read paper on cen
trifugals" in which he showed that Il
COTS almost double as much to get the
last tive and one-hslf per cent Of low
grade sugar out of the molasses as to
get the first eighty,fve per cent of No.
n. To separate the No. i sugar required
4 200 centrifugal hours, while the hnal
2.5 per cent. Of low grades took over
~ 900 centrifugal hours for complete
recovery.
AL About CentrifugaIs
The speeding up of centrifugnls and
lthe economies involved were discussed
ihy Messrs. Duker, Messchaert, Norris
and johnson. The subject of "Boil-
iinG House Balance was treated Of
shy, Horace johnson. "True sucrose =
values are far superior to polarization,
he said Messrs. Duker and Haldeni
agreed with him. J. P. Foster thought
the differences observed were often due
to actual differences in the Juices rath.
Ter than to methods of determinations
lUnder-ripe and over-ripe cane, or por-
itions of the crop that are diseased, or
infested with pests, or grown near salt
water, showed variations which cannot
he correlated, he said The discussion
brought out the point that this is con.
troll work. d.
Searby Shredder Discussed
At the afternoon session W. F. van
II Duker read the committee reports
on "Milling' and the work of the
Searby Shredder which was followed by
n spirited debate on the points in.
volved. H. Johnson thought that the
fibre residue of cane is the controlling
factor in milling control. =.
+ Questions as to the work of the Mes
schaert Groove brought out some good
natured grilling of the engineers by
the chemists. J. H. Pratt thought in
scrapers ought to go with
nll sgrooKeaj rollers, Mr.. MesschaeTt
acknowledges that smooth discharge
roller, has its advantages if cane can
hn ground fine. Where the shredder is
med all discharge rolls can be smooth.
He, said IL is not necessary to change
the mill settings in changing from one
'!Griety of cane to another but there is
considerable difference in the rate at
which different varieties can be ground
Renton Hind told Of an experiment
IT, grinding cane, feeding the sticks
end on and sideways. The side feed
vas much the best and he believed if
he mills could be set at right angles
10 one another so that the blanket could
ne subjected to motion in changing d.
Tections II would reduce the number Of
rolls required.
Effects Great Saving
"a nine,Eolltf mill with the Searby
Shredder in train does as good work as
can be accomplished by any l5.roller
mill, said Mr.. Hind oft takes about
E4o horse power to operate a 78 inch
,iine.r0ller mill. The shredder uses
about 800 H. P. The feed of the shed
Ter is Wight but its work is almost in
gtanteOus. ~ - . '-:.f,"
{ W. G. Pillar said that at McBryde
tic SeaT6y Shredder took from 1870 20
l40 II. P. or about the same power re- |
Glired for six.roller mill. II was mo-
tor.driven at 1900 revolutions per min
ute. s. s. Peck said the installation ut
.IGpTyue was IauiLy auu no proper CON-
clrsio9s could be drawn from it this
wear. He thought the cane ought to be
crushed before il goes to the shredder
j. II. Pratt testified that oue big adj
Npntage Of the shredder is that it
separates tools, car-hnks, rocks and
other minor impurities from the cane
fed into the mill.
H. p. Agee then called for a debate
I'll diffusion which was participated in
by R. S. Norris, Renton Hind, \.
Kraft, W. r. MeAllop, w. H. Crozirr,
horace johnson and j. p. Foster Dr.
Agee said the only serious problem
that would arise If the hiffusior ro-
cess is adopted would be that of fuel.
Hot or Gold Water -
w. II. Crozier raised the question of
the relative value of hot or cold macer
Stion water. w. Ssbrby said he had
tried both and there was no difference
IN the extraction in, one week trials at
Puunene. The engineering advantag"
Of using hot, water is that dryer fuel
can be got, and the engineering disad
vantage Of heating the journals. R. 8.
Norris had tested hot and cold waters
finding absolutely no difference in the
extraction. He quoted similar findings