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1
210
The Fairy-Land of Science
·
Arabella B. Buckley
73
Go
to
any
piece
of
ground
which
is
left
wild
and
untouched
you
will
find
it
covered
with
grass
weeds,
and
other
plants;
if
you
dig
up
a
small
plot
you
will
find
innumerable
tiny
roots
creeping
through
the
ground
in
every
direction.
Each
of
these
roots
has
a
sponge-like
mouth
by
which
the
plant
takes
up
water.
Now,
imagine
rain-drops
falling
on
this
plot
of
ground
and
sinking
into
the
earth.
On
every
side
they
will
find
rootlets
thirsting
to
drink
them
in,
and
they
will
be
sucked
up
as
if
by
tiny
sponges,
and
drawn
into
the
plants,
and
up
the
stems
to
the
leaves.
Here,
as
we
shall
see
in
Lecture
VII.,
they
are
worked
up
into
food
for
the
plant,
and
only
if
the
leaf
has
more
water
than
it
needs,
some
drops
may
escape
at
the
tiny
openings
under
the
leaf,
and
be
drawn
up
again
by
the
sun-waves
as
invisible
vapour
into
the
air.
Again,
much
of
the
rain
falls
on
hard
rock
and
stone,
where
it
cannot
sink
in,
and
then
it
lies
in
pools
till
it
is
shaken
apart
again
into
vapour
and
carried
off
in
the
air.
Nor
is
it
idle
here,
even
before
it
is
carried
up
to
make
clouds.
We
have
to
thank
this
invisible
vapour
in
the
air
for
protecting
us
from
the
burning
heat
of
the
sun
by
day
and
intolerable
frost
by
night.
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