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liquid resin contained therein at the same tem-
perature as that contained in the aforesaid
chamber b, whence it is drawn. The chamber
a is furthermore provided with a thermometer,
d, which is intended to indicate the degree of
temperature of the crude turpentine therein
contained, to the end that the operator may
regulate the supply of steam thereto, and thus
prevent the said crude resin from attaining a
degree of heat to the extent of vaporization.
Should, however, by any chance of neglect,
vaporization of the crude resin in the cham-
ber a ensue, the said vapor will be allowed
exit therefrom through the pipe e, and be
received into the bottom chamber of the col-
umn or separator D. The evaporator or still
C, before mentioned, is provided throughout
its lower semicircular base with a superheat-
ing steam-jacket or chamber, c, also before in-
dicated, into which steam is supplied from the
steam-boiler by the inlet-pipe 12, connected
therewith. The steam thus received and con-
tained within the said steam-chamber cis super-
heated by means of fire maintained within the
furnace E, constructed for this object. The
steam thus superheated serves to vaporize the
liquid and crude turpentine contained within
the still C, as well, likewise, as to supply the
steam-coil 13, a continuation of which forms
the pipe 14, steam-coil 15, and coil 2, the last
of which was before mentioned. The steam
jacket or chamber c is provided with a pipe,
16, which has a stop-cock whereby condensed
water may be withdrawn from the said cham-
ber c.
The vapor which is produced by the boiling
or vaporizing process effected within the still
C by means of the superheated steam in the
chamber c and coil 13, continued therefrom,
is conveyed to the condenser F through and
by means of the pipe m, the aforementioned
separator D and pipe n, a continuation of the
latter forming the condensing coil or worm o,
which is likewise continued to the recepta-
cle G, whence, by the connecting-pipe 28, it
may be conducted to the vessel H, from which
may be drawn, the spirits of turpentine into
barrels or other vessels prepared for its re-
ception.
It will now be perceived and readily under-
stood by any person familiar with the distil-
ling process, that as the vapors are generated
from the raw or crude material in the boiling-
chamber C by means of the steam in the cham-
ber c and coil 13, t5 which allusion has already
been made, and as they ascend the said en-
larged pipe m they will, by reason of their
contact with the surfaces of the said pipe,
which being in the outer air and exposed rel-
atively to a lower or cooler degree of temper-
ature, to some extent be condensed, and there-
fore divested of a considerable portion of their
heavier or liquid particles, which, by their
own superior gravity will naturally fall back
to the boiling-chamber, leaving only the un-
condensed or lighter vapors to pass on through
the said pipe m to the said column or vessel D.
The said vessel D is provided with condens-
ing-plates s, so contrived and arranged as to
receive the vapors against their lower sur-
faces, and, in their passage are also forced
through an accumulated stratum of liquid
upon their upper surfaces by means of the in-
verted cups t, placed over their outlets or per-
forations, as plainly shown in the drawing.
The contact of the vapors with the pipe in
and the lower surfaces of the condensing-
plates, above described, and their passage
through the liquid upon their upper surfaces,
as above described, will completely free them
of all the woody, vinegar, or pyroligneous
acids or other impurities which they contain
at this stage or condition of the distilling
operation, and the vapors which remain will
pass on to be liquidized by the aforesaid con-
densing-worm o placed within the vessel F,
which is immersed in cold water for the ac-
complishment of this purpose, and finally be
discharged into the vessel G, whence they may
be withdrawn into barrels by means of the
stop-cock u, or further conveyed as before
mentioned to the vessel H, and thence with-
drawn by means of the stop-cock V. The vessel
or tank F, in which the condensing-worm o is
placed, is supphed with a constant stream of
cold water by means of the inlet-pipe or feed-
pipe w, which conveys the cold water down to
the bottom of this vessel, and as it becomes
warm by its absorption of the heat from the
worm o will ascend to the outlet-pipe x, where
it may be wasted, or, if desired, rendered avail-
able for the supply of the steam-boiler, which
it is necessary to use in connection with my
apparatus. The condensed and impure liquid
which will naturally accumulate in the bottom
of the vessel D may be drawn into the vessel
I, thence into barrels or wasted, as may be de-
sired. An egg or expanded joint, as shown at
17 on the pipe m, is introduced for the recep-
tion of the heavier liquid particles which may
be thrown off from the evaporating-chamber
C. These will accumulate in the lower part
of the said expanded joint whence they may
be drawn off or returned to the bottom of the
evaporating-chamber C by means of a pipe
provided for this purpose. The evaporating-
chamber C is provided with a thermometer,
at 18, and with a proof-stick, as at 19. The
said chamber C is furthermore provided with
the slide-valve 20, operated by the lever
21. This slide-valve opens communication
with the pipe 22, by means of which the
residuum or resin, which is the product re-
maining after the process of evaporation and
production of the pure spirits of turpentine is
complete. The resin, still in a liquid or par-
tially liquid condition, is drawn continuously,
if desired, into the strainer.K, which is sur-
rounded with a steam-jacket, as shown, into
which steam is supplied through the pipe 23,
and from which the condensed-steam water is
conveyed by the pipe 24. The said strainer
K is provided, moreover, with the movable
perforated straining-plates 24' and 25', which