DOCUMENTS 595 AUGUST 1918 847
[48]Adler’s
conclusion,
which
was
omitted in Adler
1920,
is that the
symmetry systems
of
all
pairs
or equivalent systems
coincide.
[49]P.
113.
[50]The
equation expresses
that the
two
measuring
rods M and
M'
coincide the instant that motion
begins.
[51]Adler
replaced manuscript pages
106 and 107 with the bottom
half of
p.
113 and the
top
half
of
p.
118 in Adler 1920.
[52]The
claim is that the
system
time
of
the
symmetry system
is identical
to
the zonal time and that
clocks in this
system
do
not
need
to
be
synchronized
to
show the
system
time.
[53]The
statement
that,
given
the
validity
of
the
Lorentz
transformation, two
equivalent systems are
not equivalent to
their
symmetry system.
[54]P.
121.
[55]The
assumption
that
space
and time
are homogeneous.
[56]P.
125.
[57]The
claim that the Lorentz contraction is
asymmetric: an object
at rest
in K
seems
longer to
an
observer in S
as w
increases,
whereas
an object
at rest
in
S
seems
shorter to
an
observer
in K
as w
increases.
[58]The manuscript
consists
of
242
pages.
[59]Adler
was imprisoned
in
Stein
an
der
Donau
(see
Doc. 582,
note 6).
[60]Probably
Goldscheid 1918
(Reine Vernunft
und
Staatsvernunft).
See Doc.
591, note 10.
595. To
Walter Dällenbach
[Ahrenshoop,]
8.
VIII.
[1918]
Lieber Dällenbach!
Ich
gratuliere zum
Dr.
Er
erleichtert
den Verkehr mit den Menschen nicht
unwe-
sentlich nach meiner
Erfahrung.
Für
die
Publikation
Ihrer Dissertation
empfehle
ich Ihnen die
Vierteljahrsschrift
der Zürcher Naturf. Gesellschaft. An die Publika-
tion in
einer
deutschen
Zeitschrift
ist
wegen
des
grossen Papiermangels
nicht
zu
denken.-[1] Hier
an
der
Ostsee ist
von Grippe
nichts
zu spüren.
Ich
gehe
aber
in
einigen Tagen
wieder
heim nach
Berlin.[2]
Frohe Ferien wünscht Ihnen Ihr
Einstein
Herzliche Grüsse
an
Bessos.
Berliner Adresse: Haberlandstr.
5.
AKSX (SzZE
Bibliothek,
Hs.
304:1229).
[9
078].
The
verso
is addressed "Herrn Dr.
Dällenbach
Uni-
versitätstr. 33 Zürich
(Schweiz),"
with return address "Abs. A. Einstein Haberlandstr.
5 Berlin.,"
and
postmarked "Ahrenshoop
7
8 18 9-10V[ormittags]."
[1]Dällenbach received the doctorate the
following
year (see
"Promotionen
an
der
Eidg.
Tech.
Hochschule
vom
1.
Februar
bis
1.
Juli 1919" in ETH
Programm
1919b,
p.
65).
The dissertation
(Däl-
lenbach
1918)
was
published
in revised form in the Annalen
der
Physik
(Dällenbach
1919a).
[2]A pandemic
of
influenza
swept
the world in
summer
and
autumn 1918.
Reports
of
outbreaks in
the German
Army began
to
circulate in June.