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POTATOES
—
PROCESS
OF
MASHING.
119
made
into
paste.
When
the
fecula
is
thought
sufficiently
drained,
the
drainer
is
turned
over
on
a
table
used
for
this
purpose,
and
there
it
is
broken
into
pieces.
This
operation
is
only
necessary,
as
already
observed,
when
the
fabrication
of
fecula
is
not
connected
with
that
of
spirits.
This
has
been
done
at
Paris,
for
instance,
where
many
distillers
buy
their
fecula
from
the
starch-makers.
From
a
given
quantity
of
potatoes,
20
per
cent,
of
dry
fecula
is
obtained.
No
more
can
be
reckoned
upon,
for
the
ope-
ration
of
rasping
is
not
perfect
enough
to
produce
the
result
indicated
in
the
chemical
analysis.
PROCESS
SPOKEN
OF
IN
THE
FIRST
MODIFICATION.
For
a
tub
of
12
hectolitres,
intended
to
contain
only
11
hectolitres
of
matter,
from
80
to
85
kilogrammes
of
dry
fecula,
or
from
120
to
125
kilogrammes
of
raw
fecula,
or
all
the
fecula
resulting
from
400
kilogrammes
or
5J
hec-
tolitres
of
good
potatoes,
are
made
use
of.
This
quantity
is
deposited
in
the
tub
with
a
portion
of
cold
water,
so
as
to
form
a
tolerably
clear
paste
;
that
is,
with
about
twice
its
weight
of
water.
But
great
care
should
be
taken
to
stir
this
mixture,
because
without
this
precaution
the
fecula,
which
is
much
heavier
than
water,
would
prompt-
ly
precipitate
itself
to
the
bottom
of
the
tub,
and
there
form
a
hard
sediment,
which
is
with
great
difficulty
brought
to
a
state
of
suspension.
This
state
of
suspension
is
necessary
for
a
subsequent
part
of
the
operation.
Every
thing
being
thus
disposed,