111 / 230
SPIRIT
OF
POTATOES.
Ill
E,
it
hangs
by
the
extremity
C,
and
causes
the
double
trap
to
open,
and
thus
to
let
the
boiled
potatoes
fall
out.
The
tube
f
(fig.
14)
is
destined
to
introduce
the
steam
into
the
tub
A;
its
internal
orifice
is
protected
by
an
inclined
plane
c,
full
of
holes.
This
keeps
the
potatoes
from
stopping
the
tube
F,
and
from
thus
becoming
an
obstacle
to
the
free
entrance
of
the
steam
;
it
is
also
use-
ful,
the
same
as
the
plane
H,
to
prevent
the
boiled
pota-
toes
from
being
left
in
the
corners
of
the
tub.
By
means
of
this
apparatus
and
of
the
boiler
just
described,
900
kilogrammes
of
potatoes
may
be
boiled
in
one
hour;
this
will
require
14
kilogrammes
of
coals.
It
is
necessary,
as
a
matter
of
economy,
to
lute
the
various
parts
of
this
ap-
paratus
through
the
joints
of
which
steam
might
be
lost.
This
is
done
by
means
of clay
mixed
with
some
other
substance.
The
most
convenient
place
that
can
be
given
to
the
tub
is
above
the
hopper
of
the
reducing
machine,
which
will
shortly
be
spoken
of.