The Hawaiian gazette., 1871-03-08

lated by tap, and leaving the lees or sediment be-
hind, 10 the concretor, under another roof. At the
head Of the concretor and above the trays stands
obong boilerpIate received into which the juice
passes through series of hoppers and Selves Of DR..
Neild's design, and from which it flows by II inch
pipe into beautifully designed saucer, Is inches in
diameter, where it is regulated by perforated in
ternal circle of copper, through which the juice is
passed by adjusting screw.
The trays, which, in their arrangement, somewhat
resemble quartz-crushing machine 80 feet long
by feet 10 inches wide for the two upper trays Of
wrought iron, and feet inches wide for the four
lower trays of cast iron and side Of the tray
table project four of the aforementioned saucers,
round about which the descending juice travels, being
diverted by stop ripple standing the table.
These large rpplcs with happen at the june
tons Of the trays, while smaller examples at
regular intervals between them, open at alternate
ends to make the juice travel to and fro-the aim of
the whole being to the heated and steaming
juice pass the greatest extent Of surface avail
able, so the greatest amount of evapora-
ton. A copper tube runs down the tables, having a
tap each saucer for the purpose Of diseharging
fresh juice upon any of the trays where the heat be-
meath may prove too much for the jnice travelling
down from the head of the tables by overevaporation
and consequent burning. On the other hand, should
not the syrup be sufficiently DONE small pump re-
it to the head of the table through the copper
tube. once more to travel down the heated trays
The heat is got from furnace under the head of the
table, and, after serving the purpose of evaporation
it is made to pass up 100 castiron tubes inclosed in
iron cylinder feet high, the air in which, being
heated by the tubes, is drawn down an inclined fue
oblong funnel to the lower end of the cylinder by
fan at its upper end.
This cylinder is n beautiful and scientific machine
for further evaporation and condensation of the syrup
which first enters oblong tank standing between
the trays and the cylinder in which tank the trays
discharge their syrup. Here stands up cylindrical
cone, in which floats a saecharOmeter, so that the
density Of the passing juice always be seen at
glance, and here also stand two perforated circular
copper guards the two outlet pipes which pass
the juice into the cylinder and stop impurities from
passing with it. On the outer margin of the tank is
braeketed another saucer with its copper regulator
and adjusting screw, through which the syrup must
travel before arriving at the revolving cylinder which
is slowly driven by pretty little engine working be-
low the fan at the upper end. This small but active
workman is supplied with steam from the boiler in
the adjoining building, driving both the cylinder and
the fan, the former by pnion and engaged circle,
and resting friction rollers
The casing of the cylinder is wood, banded with
light iron hoops, and the interior is occupied by
coil of perforated sheet iron, in sections resembling
the Ionic voute, along and through which the syrup,
entering at the upper end and scooped up by the
volute, passes drips and is further condensed and
evaporated by the powerful current of hot air drawn
chain of copper buckets, that lift aud discharge it
into tray, advanced under the buckets withdrawn
out of their way at will by external lever moved
by hand under a toothed segment. Boiling and
evaporation have done their work. and the result
concrete, which falls thick and tolerably solid into
vessels below to be borne away to the sugarhouse to
Jet. The concrete passes through trap in an ex- |
ernal shoot communicating with the upper end of the
evolving cylinder; but should the syrup be still |
the trap is closed by slide and it is re-
urned to the upper end for second treatment by |
lot air. The building covering the machinery has |
Ouble gabled corrugated roof with an area Of fifty
y seventy feet the chimney is of iron and the trays
veil set in brick-work The fly and driving wheels
re small in diameter, but very massive. All waste
team is conserved in two traps communicating with
be defacators, and the boiler is tubular, altered re-
emily to work up to As lbs. of steam.