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210
The Fairy-Land of Science
·
Arabella B. Buckley
110
In
those
ancient
days,
there
were
even
glaciers
in
England;
for
in
Cumberland
and
in
Wales
you
may
see
their
work,
in
scratched
and
rounded
rocks,
and
the
moraines
they
have
left.
Llanberis
Pass,
so
famous
for
its
beauty,
is
covered
with
ice-scratches,
and
blocks
are
scattered
all
over
the
sides
of
the
valley.
There
is
one
block
high
up
on
the
right-hand
slope
of
the
valley,
as
you
enter
from
the
Beddgelert
side,
which
is
exactly
poised
upon
another
block,
so
that
it
rocks
to
and
fro.
It
must
have
been
left
thus
balanced
when
the
ice
melted
round
it.
You
may
easily
see
that
these
blocks
were
carried
by
ice,
and
not
by
water,
because
their
edges
are
sharp,
whereas
if
they
had
been
rolled
in
water,
they
would
have
been
smoothed
down.
We
cannot
here
go
into
the
history
of
that
great
Glacial
Period
long
ago,
when
large
fields
of
ice
covered
all
the
north
of
England;
but
when
you
read
it
for
yourselves
and
understand
the
changes
on
the
earth's
surface
which
we
can
see
being
made
by
ice
now,
then
such
grand
scenery
as
the
rugged
valleys
of
Wales,
with
large
angular
stone
blocks
scattered
over
them,
will
tell
you
a
wonderful
story
of
the
ice
of
bygone
times.
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