320
DOCS.
329,
330
APRIL
1917
Page
83,
line
10
from
the
bottom,
instead
of “continuous”
[unausgesetzte]
it
should read “assumed”
[vorausgesetzte].
Page
15,
point
4,
the
words “determined
by
gravitation
and inertia”
are
miss-
ing;
and in
the
note at
the
top,
instead
of
“geodetic
line”
it should
read
“gravitation
+
inertia.”
All in
all,
the
paper
has become
a
bit
inflated,
but
I
did not have
the
time to be
as
brief
as
I
would have
liked.
Cordial
regards, yours,
Fr. Adler
The
paper by
Schlick will
be
returned
to
you.
Many
thanks
for
it!
330. To
Eduard
Hartmann[1]
[Berlin,
27 April
1917]
Einstein
repudiates
an
objection
to his
general
theory
of
relativity
that had been raised
by
Ernst
Gehrcke
...
the
difficulty
of
answering
it
lies
in
that,
in order
to
give
the
case
full
treatment,
the
cosmos
would have
to
be drawn
in,
the
overall structure of which
theory
has
not
given any
definite information until
now.
Not
even
in
the
question
of
whether the universe
ought
to be conceived
spatially
or as
finite
or
infinite
is
there
any
transparency.
I wrote
a
paper
on
this
point
recently[2]
...
it
is
easy
to
see
that
Gehrcke’s
objection
has
no
weight.
It
predicts
that
gravitation
lines
(on
the
positive side)
could
only
end
in
masses,
from
which
the absurd
inference
then
immediately
results.[3]
This condition
is
borrowed from Newton’s
gravitation
theory,
which
can
obviously only
claim
validity
in
the
static
case.
The
gravitational field
perceived
by
the accelerated observer
is not
produced statically,
though,
but
dynamically
by
the distant
masses,
through
their
acceleration.[4] In
analogy,
the
generation
of
electrical
(electromotive)
force
in
Faraday’s
induction
could be
named,
which
originates
from
a
temporally
variable current.
Induced
current
temporally
variable
induced current