DOC.
21
MOLECULAR MOTION IN
SOLIDS
377
Experiments will
have to
decide whether
C
is independent
to
some
extent
of
the nature
of the
substance;
it will
be the task of
theory
to
modify
molecular
mechanics in such
a
way
that
it will
yield
the
law
of
specific
heats
as
well
as
the
seemingly
so
simple
law
of
thermal
conductivity.
Prague, May
1911. (Received
on
4
May 1911)
NOTE ADDED IN PROOF.
To
make
clearer the
last sections
of
§2,
let
me
add the
following.
If
p(v/v0)
denotes
a
function
that
is
to be
conceived
as
the
temporal frequency
of
the
instantaneous
frequency v,
and
j
(v0/T)
the
specific
heat of the monochromatic
structure
of
frequency
v0,
then the
specific
heat of
the
nonmonochromatic
structure
can
be
expressed
by
the formula
=
f$(vox\,J~(x)dx.T
x=o
One
arrives at
Nernst's formula
if
the function
p(x)
is
given
values
different from
zero
for the
arguments
1
and
1/2
only.