DOCUMENTS 549, 550 MAY 1918 775
ALSX
(GyGöU,
Cod. Ms. D.
Hilbert
92b). [13 124].
There is
a perforation
for
a
loose-leaf
binder
at
the left
margin
of
the document.
[1]See
Doc. 530 for Hilbert’s refusal
to
contribute
to
a planned
collection
of
essays,
which Einstein
had
proposed
in late
April
(see
Docs. 521 and
522).
[2]Einstein had
already begun inching away
from
the
undertaking
in
mid-May
(see
Doc.
537)
[3]The
Manifesto
of
the
93,
composed
at
the outbreak
of
the
war,
emphatically rejected
German
war
guilt (see
Doc.
45,
note
3).
[4]Ernst Troeltsch,
e.g.,
had
responded negatively
three weeks
earlier
(see
Doc.
531).
For
a
list
of
recipients
of
the
circular,
see
Doc. 522.
[5]A relapse
of
Einstein’s
gastric
ulcer.
[6]The
first
topic
discussed in Max Planck’s Wolfskehl lectures
on quantum theory was
the relation
between
entropy
and
probability (see
Doc.
540,
note
3),
a topic on
which Planck and Einstein held
different views
(see
Docs. 479 and
486).
[7]Emmy
Noether;
Noether
1918a.
549.
To
Felix Klein
[Berlin,
28
May
1918]
Verehrter
Herr
Kollege!
Die
Korrektur
können Sie
natürlich behalten
und
zeigen, wem
Sie
wollen.[1]
Ich
habe Sie Ihnen
nur geschickt,
weil ich
weiss,
dass Sie sich für diese
Frage
interes-
sieren.[2]
Es
bedarf
keiner
Aeusserung darüber,
aber
es
würde mich
freuen, wenn
Sie die
Abhandlung gelegentlich
lesen würden.
Es ist eine
mathematische
Lücke
im
Gedankengang übrig geblieben.[3]
Mit
aller
Hochachtung
A. Einstein.
AKS
(GyGöU,
Cod. Ms.
F.
Klein 22B:
Einstein, 13). [14 443].
The
verso
is addressed "Herrn Prof.
Dr.
F.
Klein Universität
Göttingen,"
and
postmarked
"Berlin-Wilmersdorf
1
28.5.18. 6-7N[achmit-
tags]."
The
recipient’s
identification
of
the author at the head
of
the
verso
is omitted.
[1]Proofs
of Einstein
1918g (Vol. 7,
Doc.
9).
[2]In
March
1918,
Einstein
and Klein had
a
discussion about
energy-momentum
conservation
prompted
by
Klein, F.
1917
(see
Docs.
480, 487, 492,
and
540).
[3]Einstein refers
to
his
proof
of the
vanishing
of
the
spatial divergence
of
the
energy-momentum
pseudo-tensor
of
matter
plus gravitational
field,
which lacked sufficient
generality
(see
Einstein
1918g [Vol.
7,
Doc.
9], p. 457).
The
vanishing
of
this
divergence
allows the
transformation of
the
energy-momentum
conservation law from
a
differential
form
to
an integral
form,
in which
only
de-
rivatives with
respect
to
x4
occur.
550. From Max
von
Laue
Würzburg,
29. 5.
18.
Lieber
Einstein!
Ich danke Dir herzlich
für
Deine Karte. Die Müllersche
Hofbuchhandlung
ist in
Karlsruhe
(Baden).
Sommerfeld meint
nicht
ganz
mit
Unrecht,
man
sollte des