117 / 230
POTATOES
—
SEPARATION
OF FECULA.
117
continuous
stream
of water,
proportionate
to
the
dimensions
of
the
sieve,
is
running
in
the
latter.
For
a
sieve
of
2
feet
in
diameter
and
1
in
depth,
the
water
may
be
intro-
duced
through
a
pipe
of
4
or
5
millimetres
in
diameter.
This
water,
by
means
of
the
movement
which
the
pulp
undergoes,
penetrates
the
latter,
and
runs
through
the
sieve
into
the
tub,
carrying
the
fecula
away
in
a
state
of
dissolution.
This
operation
is
continued
until
the
water
running
through
the
sieve
is
clear
and
not
impregnated
with
fecula.
Then
the
pulp
is
thrown
aside
for
the
T)urpose
of
feeding
cattle,
and
it
is
replaced
by
other,
which
is
in
the
same
manner
deprived
of
its
fecula.
From
2500
kilogrammes
of
good
potatoes
500
kilogrammes
of
fecula,
supposed
to
be
dry, are
obtained,
or
750
kilogrammes
of
drained
fecula,
which
then
bears
the
name
of
raw
fecula.
The
latter
is
to
the
former
: :
3
:
2,
so that
3
kilogrammes
of
raw
fecula
will
give
2
kilogrammes
of
dry;
13
hecto-
litres
of
pulp, or
husks
of
potato,
are
moreover
obtained,
which
contain
about
the
same
quantity
of
water
as
the
raw
potatoes
—
that
is,
three-fourths of
their
weight;
so
that
those
13
hectolitres
of
pulp
retain
about
975
litres
of
water.
This
pulp
may
be
given
to
cattle^
but
it
is
by
far
not
so
good
as
that
resulting
from
the
distillation
of
pastes,
which
is
well
boiled
and
nourishing.
It
might
be
possible
to
obviate
these
inconveniences,
in
a
distillery,
by
boiling
the
pulp
with
the
hot
spent-
wash
that
is
left
in
the
still
after
distillation.
There
is
a
more
suitable
disposition
of
the
sieve
than
that
just
in-
dicated,
and
it is
thought
necessary
to
notice
it
here.
It
consists
in
filling
at
once with
water
the
tub
destined
to