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48
THE
COMPLETE
PRACTICAL
DISTILLER.
figure,
being
called
matrasses,
balloons,
&c.
There
have
been
various
modes
of
applying
heat
in
distillation,
de-
pending
upon
the
nature
of
the
apparatus
employed
as
well
as
upon
the
substance
to
be
distilled.
The
common
still
being
formed
of
metal,
is
immediately
exposed
to
the
naked
fire,
since
from
its
tenacity,
and
its
property
of
conducting
heat
with
facility,
it
is
not
liable
to
crack,
which
is
not
the
case
with
glass
or
earthenware.
The
still
is
heated
in
various
ways,
the
most
common
of
which
has
been
by
the
sand-haihj
a
vessel
of
iron
filled
witl*
fine
dry
sand.
Fig.
5.
The
annexed
figure
(5)
is
a
specimen
of
a
still
which
has
stood
the
test
for
a
number
of
years,
and
is
one
worthy
of
the
attention
of
the
reader.