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210
The Fairy-Land of Science
·
Arabella B. Buckley
60
Wind
is
nothing
more
than
air
moving
across
the
surface
of
the
earth,
which
as
it
passes
along
bends
the
tops
of
the
trees,
beats
against
the
houses,
pushes
the
ships
along
by
their
sails,
turns
the
windmill,
carries
off
the
smoke
from
cities,
whistles
through
the
keyhole,
and
moans
as
it
rushes
down
the
valley.
What
makes
the
air
restless?
why
should
it
not
lie
still
all
round
the
earth?
It
is
restless
because,
as
you
will
remember,
its
atoms
are
kept
pressed
together
near
the
earth
by
the
weight
of
the
air
above,
and
they
take
every
opportunity,
when
they
can
find
more
room,
to
spread
out
violently
and
rush
into
the
vacant
space,
and
this
rush
we
call
a
wind.
Imagine
a
great
number
of
active
schoolboys
all
crowded
into
a
room
till
they
can
scarcely
move
their
arms
and
legs
for
the
crush,
and
then
suppose
all
at
once
a
large
door
is
opened.
Will
they
not
all
come
tumbling
out
pell-mell,
one
over
the
other,
into
the
hall
beyond,
so
that
if
you
stood
in
their
way
you
would
most
likely
be
knocked
down?
Well,
just
this
happens
to
the
air-
atoms;
when
they
find
a
space
before
them
into
which
they
can
rush,
they
come
on
helter-skelter,
with
such
force
that
you
have
great
difficulty
in
standing
against
them,
and
catch
hold
of
something
to
support
you
for
fear
you
should
be
blown
down.
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