DOC.
47 283
Fig.
2.
Fig.
2
shows
this
curve1 which,
up
to
the scale
for
the abscissa
and [54]
ordinate,
represents the relation
between
Am
(abscissa)
and
Ae
(ordinate).
The
little
crosses
above
the
curve
indicate the
curve
calculated
according to
the
theory
of
relativity,
if the value of
c/u
is taken
as
1.878
.
107.
[56]
In
view
of the difficulties involved in the
experiment
one
would be
inclined
to
consider the
agreement as
satisfactory.
However,
the deviations
are
systematic and considerably
beyond
the limits of
error
of
Kaufmann's
experiment.
That
the calculations
of
Mr. Kaufmann
are
error-free is
shown
by
the fact that,
using
another
method
of calculation,
Mr.
Planck arrived
at
results that
are
in full
agreement
with those
of
Mr. Kaufmann.2
Only
after
a
more
diverse
body
of observations
becomes
available will it
be
possible
to
decide with confidence
whether
the
systematic
deviations
are
due to
a
not yet recognized
source
of
errors
or
to
the circumstance that the
foundations of the
theory
of
relativity
do
not
correspond to
the facts.
[58]
1The
units
given
in
the
graph
denote millimeters
on
the
photographic
plate.
The
plotted
curve
is
not
exactly
the
one
observed,
but rather the
curve
"reduced
to
infinitesimally small
deflections."
2Cf.
M.
Planck,
Verhandl.
d.
Deutschen
Phys.
Ges.
VIII,
no.
20
(1906);
IX,
no.
14
(1907).
[55]
[57]