338
EQUATIONS
FOR MOVING
BODIES
If
one
connects
the condenser plates
A1
and
A2
with
an
electrometer
of
infinitesimally small capacity, then
Dz
=
0,
and
one
obtains for the
potential
difference
(Ez
.£)
the
equation
o=
6^z
+
Bern,
29
April 1908.
(Received
on 2
May
1908)