248
ON
THE
INERTIA
OF
ENERGY
from
§5
(loc.
cit.) that the
signal
will
then be
transmitted
from
A
to
B
with the velocity
V
-
v
,
Vv
.
The
time
T
that
elapses
between
the
signal
emission in
A
and
signal
reception
in
B
is
thus
Mv
1~4~
-V.
The
velocity
v
can assume
any
value smaller than
V.
Hence,
if
W
V,
as
we
have
assumed,
then
v can
always
be chosen such
that
T
0.
This result
signifies that
we
would have to
consider
as
possible
a
transfer
mechanism
whose
use
would produce
an
effect
which
precedes
the
cause
(accompanied
by an
act of
will,
for
example). Even though,
in
my
opinion,
this result
does not
contain
a
contradiction
from
a
purely
logical
point
of
view,
it conflicts
so
absolutely
with the character
of
all
our
experience,
that the
impossibility of
[10]
the
assumption
W
V
is
sufficiently
proved
by
this result.
s4.
On
the
energy
of
a
system
consisting
of
a
number of
mass
points
moving
force-free
If
one
takes
a
look
at
the expression
for
the
kinetic
energy k
of
a
mass
point
(u)
moving
with the
velocity
v,
k
=
uv2
one
notices that
this
expression
has the form of
a
difference;
i.e.
we
have
v
=
v
k
=
ßV2
U
- (y)'*
v
=
0