The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1856-1888, 1866-08-18
Correspondence Of the P. c. Advertiser.
Improved Sugar Manufacture.

Mr.. EprroR Through the kindness of several
residents OF these islands engaged in sugar manu-
featuring. l have had opportunities TO see and ex-
anime the usual process of converting sap into
sugar. and am convinced that by the application
of other methods than those now in use. a vast
saving of fuel, water and labor can be effected,
besides a large increase in the yield OF sugar.
European manufacturers labored under the same
I disadvantages until the introduction of improve
ments not yet in general use in America Among
the most valuable Of these, in point of economy
and simplicity. Is that usually called the Roberts
machine. aud in every instance where a fair trial
has been given it. the open pans have been entirely
I discarded.
( By submitting to the readers of your paper a
brief description of this invention. / will endeavor
TO elucidatc the principle Of it. There are three
vertical cooperating cylinders of equal proportions
and construction, which for convenience we will
call first. middle and third sections. Hundreds of.
pipes are fastened in corresponding openings in
the horizontal plates, which divide the cylinder
into three apartments. These apartments are con-
structcd in such a manner. that steam introduced
into section first. will play around the numerous
pipes in the steam heating apartment. so as 10
create sufficient steam which escapes into section
second. to heat the sap to a temperature about
twenty degrees less than that contained in section
first, which attains POS TO PIP degrees Fahrenheit.
The middle section is governed by the same prin-
ciples as the first, as already ~intimated: and the third
also. presents no important variations from the
others in its operations.
The steam created in section third. is carried off
by means Of a condenser the condensed steam
also of the steam heating apartments of the middle
and third sections. is likewise operated on in such
a manner by a condenser as 20 regulate the atmos-
& rbarfc nrazGrra nf tho section hsfprp IL from
which it receives it's steam.
Following and connected with each section of
the apparatus. is a machine, which in Europe is
denominated a - surmounter," constructed for the
purpose Of catching any drops of juice which may
be carried over into it by the action of the steam.
and which is guided to it's receptacle in the next
section. 1t will be seen by this description, which
l have endcavored to make as lucid as possible
without the assistance of diagrams, that with one
fourth the labor. a third the fuel, less water and
time, more can be accomplished than has hereto
fore been the case with any of the old methods OF
boiling in open pans the clarified juice being con-
stantly deposited in the first section of the aIpara-
tus. leaves the third in condition ready for the
vacuum. and the process will also. ! am very well
convinced. afford sugar of a much superior quality.
Ii is to be hoped that for the benefit and further
ancc of the sugar interests of these Islands so
highly adapted to the culture OF cane, public atten-
ton will be attracted To this apparatus, which is a
modification of Roberts, by Walkhoff and though
frequent changes have been introduced in its con-
struction. il still retains the same original principle.
To any parties to whom these suggestions would
prove valuable, j offer my services to more fnlly
elucidatc and explain the form. &c. of the machiu-
cry, by drafts and diagrams. which | am willing to
! submit to any who may desire further information
on so interesting and important a subject. Any
communications addressed to me. care of MCssrs
Walker, Allen Il Co., will be attended to.
C. r. RINAIpI.