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210
The Fairy-Land of Science
·
Arabella B. Buckley
156
Next
look
down
at
your
feet
and
examine
the
floor.
You
will
not
have
to
search
long
before
you
will
almost
certainly
find
a
piece
of
stone
like
that
represented
in
Fig.
48,
which
has
also
come
from
Neath
Colliery.
This
fossil,
which
is
the
cast
of
a
piece
of
a
plant,
puzzled
those
who
found
it
for
a
very
long
time.
At
last,
however,
Mr.
Binney
found
the
specimen
growing
to
the
bottom
of
the
trunk
of
one
of
the
fossil
trees
with
spotted
stems,
called
Sigillaria;
and
so
proved
that
this
curious
pitted
stone
is
a
piece
of
fossil
root,
or
rather
underground
stem,
like
that
which
we
found
in
the
primrose,
and
that
the
little
pits
or
dents
in
it
are
scars
where
the
rootlets
once
were
given
off.
Whole
masses
of
these
root-stems,
with
ribbon-like
roots
lying
scattered
near
them,
are
found
buried
in
the
layer
of
clay
called
the
underclay
which
makes
the
floor
of
the
coal,
and
they
prove
to
us
that
this
underclay
must
have
been
once
the
ground
in
which
the
roots
of
the
coal-plants
grew.
You
will
feel
still
more
sure
of
this
when
you
find
that
there
is
not
only
one
straight
gallery
of
coal,
but
that
galleries
branch
out
right
and
left,
and
that
everywhere
you
find
the
coal
lying
like
a
sandwich
between
the
floor
and
the
roof,
showing
that
quite
a
large
piece
of
country
must
be
covered
by
these
remains
of
plants
all
rooted
in
the
underclay.
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