DOCS. 548-550
MAY 1918 569
to have been sent to
Miss
Noether for
schooling.
She
seems
to know
her trade
well!
Cordial
regards
from
yours
truly,
A.
Einstein.
549. To
Felix Klein
[Berlin,
28
May
1918]
Esteemed
Colleague,
You
may keep
the
correction
proof,
of
course,
and show
it
to
whomever
you
wish.[1] I just
sent
it to
you
because
I
know
that
you
are
interested
in
this
problem.[2]
No
comment
on
it
is
necessary,
but
I
would be
pleased
if
you
read
the
paper
when
you
have
a
chance.
A
mathematical
gap
in
the train
of thought
remains.[3]
With
all due
respect,
A.
Einstein.
550. From Max
von
Laue
Würzburg, 29
May
1918
Dear
Einstein,
I
thank
you
heartily
for
your postcard.
The Müller’s
Court
Booksellers is
in
Karlsruhe
(Baden).
Sommerfeld
thinks,
not
quite
without
justification,
that
the honorarium
should
not
be
waived,
on
principle;
as soon as
Warburg’s
and
Planck’s
comments have also
arrived,
I
intend to
suggest
80 M to
the
publisher
for
the
printer’s
proof.[1]
Planck
wrote
me, incidentally,
it
was
now
clear
enough
to him
so
that
he could
do
without
your
and
Warburg’s manuscripts.[2]
Please send
yours
to
me
here
soon
now,
probably
best
by “registered,”
for
safety’s
sake. I
can
then forward it to
the
publisher
as soon
as
the
negotiations
with him have been concluded.
In order to
report
some
science to
you
now as well,
I would
like
to write
that
I
examined
a
bit
more
closely
the
“electron
gas”
idea which
haunts the literature
on
electrons in
glow
discharge. Mathematically,
it
involves
the
equation
Ap
=
ep
which
can, however, by
all
means
be
integrated
as
far
as
is
necessary
for this. In
two
dimensions,
its
integration is
almost
as
elegant
as
for Ap
=
0.
The
physical