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210
The Fairy-Land of Science
·
Arabella B. Buckley
107
It
is
very
curious
to
see
the
number
of
little
rills
running
down
the
great
masses
of
ice
at
the
glacier's
mouth,
bringing
down
with
them
gravel,
and
every
now
and
then
a
large
stone,
which
falls
splashing
into
the
stream
below.
If
you
look
at
the
glacier
in
the
Frontispiece,
you
will
see
that
these
stones
come
from
those
long
lines
of
stones
and
boulders
stretching
along
the
sides
and
centre
of
the
glacier.
It
is
easy
to
understand
where
the
stones
at
the
side
come
from;
for
we
have
seen
that
damp
and
frost
cause
pieces
to
break
off
the
surface
of
the
rocks,
and
it
is
natural
that
these
pieces
should
roll
down
the
steep
sides
of
the
mountains
on
to
the
glacier.
But
the
middle
row
requires
some
explanation.
Look
to
the
back
of
the
picture,
and
you
will
see
that
this
line
of
stones
is
made
of
two
side
rows,
which
come
from
the
valleys
above.
Two
glaciers,
you
see,
have
there
joined
into
one,
and
so
made
a
heap
of
stones
all
along
their
line
of
junction.
These
stones
are
being
continually,
though
slowly,
conveyed
by
the
glacier,
from
all
the
mountains
along
its
sides,
down
to
the
place
where
it
melts.
Here
it
lets
them
fall,
and
they
are
gradually
piled
up
till
they
form
great
walls
of
stone,
which
are
called
moraines.
Some
of
the
moraines
left
by
the
larger
glaciers
of
olden
time,
in
the
country
near
Turin,
form
high
hills,
rising
up
even
to
1500
feet.
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