Baton-Rouge gazette. [volume] (Baton-Rouge, La.) 1819-1856, 1852-11-20

r,,p during ebuIilion Ia a vacuum pan NJ
aicaes as low perhaps az 100 deg Fali
the copper worm, against which portions
of The sugar are constantly brought into
contact, is equal to ard oTlen above 226
deg, Fab; the consequences ot which is
the destruction Of the color, aud injury to
the ehryslalisng powers Of the sugar By
All arrangement which Mr. Bessen'ef
terms hot air evarorator, Tie eottehtfa-
ton Of satehatine fluids may now, how
ever, he effected without the slighses in
Jury 10 color or quality, and in ali lntreas.
ed quantity a.
This apparatus consists Of d tank Of
thin plate iron, of about 10 feet by 3 feet,
and 81 leet in depth. which has a false
bottom, curved SO as to form two parallel
Sc gt,,ents Of a cylinder. Above these aud
conrilent viii, them is n hollow drum, OF
! | 8 Inches In diameter, ni6unted Oh all ax.
! il. and On which is formed broad spiral
blade III The shape Of Il screw, or "oreeper,"
the thread of which Is about afteeii inthes
In depth, and the oonvoutions three-quaf.
ters Of an inch apart; and between each
| Of the blades or Threads of the screw, holes
are formed spifaly fren one end Of the
drum to The other. At one end Of the
hollow drum, air, supplied by the blowing
fan and heated to 100 degrees by passing
along the nue, Is made to enter, which
escapes through the holes in The drum ID
a radial direction, and sweeps like the hot
breath Of the aimootn over the wet sur
fnees Of The various revolving blades. alb
sorbs the moisture thus exposed to Its ae-
tion, and passes OIL in ali invisible vhpor
Upwards of six thousand square feet Of
evaporating surface Ia thus obtained IN
tile small space Of 10 feet by 3 feet. The
screws make about eight revolutions per
minute, and as they tevolve, the more
concentrated pofti1ns Of ilie hhil are wash.
ed off az they descend into the fluid, aud
fresh PORTIONS are being constantly brought
up on the surface OF the screw, to be IN
like manner subjected to the heated blast.
Finally, after three Or four hours the whole
of the surplus liqu,r Is carried off: the
--nuid ID sufficiently concentrated,
aud assumes d thick geaiinous appear
anee and the screw, made I'd revoe III
the opposite direction, .espes lie solution
from the tank ready Tor the process Of
crys,alization By this process the sugar
IL not at any time exposed 10 d hotter sur.
face than 40 degrees. No boiling. con
sedtiell,ly, takes place, 10 sea is formed,
and not one grain of erystalizsbe sugar s
converted into nlolasses. The entire cost
of fuel for evaporation Is saved, the waste
heat Of the chimney aud waste steam Of
the engine being alone employed, aud the
appatatus costs Iess tllan the ordinary va
por ps,s 1t cen be worked with a stiaIl
amount Of wind nr water power. Three
hngaheads of sugar, 1t Is stated. can be
obtained where two only sre now prodnc-
ed, whilst The quality Will he superior IN
Nolor aud taste, aud viii be perfectly free
FROM n,olasses
The separation Of the crystals from The
mother liquor IN which they are fohinl
is effected in most Ingenious aNd eff.
cinut ilisntier hv The Use OF the air pump.
The tranefofnatoii ifnm the most fepuh
sjve aud nWholEo,nr.lpokina black sugar
NNlN II ll't' WIlIH sHGNi ~ t''tNIf''Nh ~
ole. seventh Of n second by this profess
The priltipe adopted ia precisely That
employed III "gasihg'' laee@4t,il operation
resorted 10 for the purpose Of removing
the minnie hIaments 1T cotton alherng
to the surface Of the fabric. in the caaA
Of the crystals Of sugar Il thin film of iit's
| matter Ia required TO be removed from
the surface OF the crystal and this Is effect.
ed by bringing it ia contact with water
material which would as quickly dis
Solve the crystal itself. az the flame Of the
eass would destroy the delitate aud fragile
web of the bobbinet. How tan the WI.
ter thus be brought into contact with the
sugar for such short period and in such
manner az only TO Remove the outer
coating Of molasses, aud leave the crystal
uninlured The process Is very simple
one. A table Of iiiie feet in circutriler
snce IA made to fevolve eight times per
minute, having coating Of sngaf spread
over It to the depth Of half an incli, and
consequently moves over a space Of "
feet per minute. AT one part OF Its revo.
luton the table Is made to pass under a
pipe Of two inches il diameter, from which
shower of water IA falling. and. as the
pife is bur one.sixth Of foot In diameter,
and the table passes itat the rate Of rs
feet per minute, It follows that each por-
ton which comes ulider the falling water
will be retained only l.432 ofa minute in
each revolution. This table being cover
ell with thin brass wire gauze, has placed
Immediately under it vacuum chamber,
into which the Falling water, carrying
with i, the seml-liud coating oflnoiasses,
Is drawn as the table revolves, tile crys-
talized sugar remains Oh the surface pure
aud white, aud is delivered by a scfaper
into the hogshead placed for its reception.
THE LoRD's PRAyER.-I remember, on
one occasion. travelling IN the country with
companion who possessed some knowl-
edae OF medicine. We had arrived at a
door near which we were al,out to pitch
our tents. when a crowd Of Arabs sur
bounded It's, cursing and swearing at the
erebellers against God" My friend, who
spoke little Arabic, turning round 10 an
- j, Him n