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210
The Fairy-Land of Science
·
Arabella B. Buckley
126
Is
not
this
wonderful,
going
on
as
it
does
at
every
sound
you
hear?
And
yet
his
is
not
all,
for
inside
that
curled
part
of
the
labyrinth,
which
looks
like
a
snail-shell
and
is
called
the
cochlea,
there
is
a
most
wonderful
apparatus
of
more
than
three
thousand
fine
stretched
filaments
or
threads,
and
these
act
like
the
strings
of
a
harp,
and
make
you
hear
different
tones.
If
you
go
near
to
a
harp
or
a
piano,
and
sing
any
particular
note
very
loudly,
you
will
hear
this
note
sounding
in
the
instrument,
because
you
will
set
just
that
particular
string
quivering,
which
gives
the
note
you
sang.
The
air-waves
set
going
by
your
voice
touch
that
string,
because
it
can
quiver
in
time
with
them,
while
none
of
the
other
strings
can
do
so.
Now,
just
in
the
same
way
the
tiny
instrument
of
three
thousand
strings
in
your
ear,
which
is
called
Corti's
organ,
vibrates
to
the
air-waves,
one
thread
to
one
set
of
waves,
and
another
to
another,
and
according
to
the
fibre
that
quivers,
will
be
the
sound
you
hear.
Here
then
at
last,
we
see
how
nature
speaks
to
us.
All
the
movements
going
on
outside,
however
violent
and
varied
they
may
be,
cannot
of
themselves
make
sound.
But
here,
in
the
little
space
behind
the
drum
of
our
ear,
the
air-waves
are
sorted
and
sent
on
to
our
brain,
where
they
speak
to
us
as
sound.
Week
18
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