DOC.
47
309
We
multiply
these
equations
by
(1+c2)
and
put
for
the sake
of
brevity
I*
=
I
r*
=
y
,
etc.
/* =
P
Neglecting terms
of the second
power
in
7,
we
obtain the
equations
1
c
1
c
1
c
*
dX*'
?ut+
w
*
dY*
p*u +
V
0£*
p*
c+
dN*
dM*
~K
dN*
flf
dL*
dL*
(31a)
1
dL*
c
UF
1 dM*
c
~W
dY*
W
dZ*
W
dZ*
~Wq
dX*
1
dN* dX* dY*
W
(32a)
These
equations show
first
of
all
how
the gravitational field
affects the
static and stationary
phenomena. The
same
laws
hold
as
in the
gravitation–
free
field,
except
that the field
components
X,
etc.
are
replaced
by
X[1
+
yE/c2],
etc., and
p
is
replaced
by
p[1
+
yE/c2].
Furthermore, to
follow the
development
of
nonstationary
states,
we
make
use
of the time
r
in
the
terms
differentiated with respect
to
time
as
well
as
in the definition of the
velocity
of
electricity, i.e.,
we
put
according
to
(30)
d
c
d
and
1+#
Tt
wE=[1+yE/c2]
[101]
[102]