196
DOCS.
194,
195
FEBRUARY
1916
194. To
Karl Schwarzschild
[Berlin,
19 February
1916]
Esteemed
Colleague,
Unfortunately
because
of
a
lot
of
work
I
was
not
yet
able
to
answer
your
ear-
lier
letter.[1]
Also,
the
special
cases
discussed
there
awoke
my
interest
to
a
lesser
degree.
But
I
find
your
new
communication
very
interesting.
I
have
found
your
calculation confirmed.
My
comment in
this
regard
in
the
paper
of
November 4
no
longer applies according
to
the
new
determination
of
/-g
=
1,
as
I
was
already
aware.[2]
The
choice of coordinate
system according
to
the
condition
Wdguv/dxv
=
0
is
not consistent with
/-g
=
1.
Since
then, I
have handled Newton’s
case
differ-
ently,
of
course, according
to
the final
theory.[3]-Thus
there
are no
gravitational
waves
analogous
to
light
waves.
This
probably
is
also related to
the
one-sidedness
of
the
sign
of
scalar
T,
incidentally.
(Nonexistence
of
the
“dipole”.)[4]
Cordial
greetings
and
many
thanks
for
the
interesting
communication.
Yours,
A.
Einstein.
195. To Max Born
[Berlin,]
Sunday
[27
February
1916][1]
Dear Mr.
Born,
This
morning
I received
the
correction to
your paper
for the
Physikalische
Zeitschrift,
which
I
read,
not
without
embarrassment,
but
with
the
happy
feeling
of
having
been
understood
thoroughly
and
acknowledged by
one
of
my
most
highly qualified
colleagues.[2]
But
aside from
the
objective content,
I
was
also
filled
with the
happy
sensation of cheerful
goodwill
that
emanates from the
paper
and that
otherwise
so
rarely lingers
undiluted
in
the
pale light
of the
study
lamp.[3]
I
thank
you
from
my
heart
for
granting
me
the
privilege
of
this
fine
joy.
With
best
regards, yours,
A.
Einstein.