104
DOC.
1
MANUSCRIPT
ON
SPECIAL RELATIVITY
[39]At this
point
in the
original text
Einstein indicates
a
note
he has
appended at
the foot of
the
page:
"Diese
Beschränkung
auf die mechanischen Gesetze wird
gleich
nachher fallen
ge-
lassen."
[40]Einstein's
manuscript
does
not
include
a
discussion of the
Michelson-Morley experi-
ment.
[41]For
a
similar discussion of Fizeau's
experiment,
see
Einstein
1911i
(Vol.
3,
Doc.
17),
p.
4.
[42]A
similar formulation
is
found
in
Einstein
1912h
(Doc. 8),
p.
1059.
This
paper
was
received
by
the editor of the Annalen der
Physik
on
4
July
1912.
[43]Einstein's
consideration of
a
possible
role
played
by
the Earth
together
with
all
other
objects
is
similar
to
his introduction of
the
system
U,
representing
"the
totality
of
all other
sys-
tems
in
the world"
("die
Gesamtheit aller
übrigen Systeme
der
Welt"),
in
Einstein
1912h
(Doc.
8), p.
1060.
[44]At
this
point
in
the
original text
Einstein
indicates
a
note
he
has appended
at
the foot of
the
page:
"Es
müsste
der Fizeau'sche Versuch-fern
von
der Erde
im freien Weltraum
aus-
geführt-das Resultat
V
=
V0+ql
ergeben.-
Es sei auch
erwähnt,
dass
die
Erklärung
der
Aberration
von
diesem
Standpunkte
aus
den
grössten Schwierigkeiten
begegnet."
[45]Einstein
considered
gravitational
effects
on
the
speed
of
light
in his
contemporary
stud-
ies
on
gravitation (see
the editorial
note,
"Einstein
on
Gravitation
and Relativity:
The Static
Field,"
sec.
II).
[46]The presentation
of
the
deleted
passages
that follow here
departs
from that
in
the
origi-
nal,
where the deleted
passages
at
the
foot
of
[p. 20]
and
those
at
the head of
[p. 21]
are
sepa-
rated
by
Einstein's
insertion of
[p. 20a]
(see note 49).
[47]See
Ritz 1908a, 1908b and Ehrenfest 1912.
This
passage is
discussed
in
the editorial
note,
"Einstein's
Manuscript
on
the
Special Theory
of
Relativity,"
sec.
III;
see
also
Vol.
2,
the
editorial
note,
"Einstein
on
the
Theory
of
Relativity,"
p.
263,
for
more on
Ritz's
theory.
[48]These
complications
are
discussed
in
Einstein's
correspondence
with Paul Ehrenfest
in
spring
and
early
summer
1912
(see
Vol.
5,
Docs.
384, 390,
394,
404, and 409).
[49]Einstein
inserted
the
text
on [p. 20a]
to replace
the deleted
passages ending
here. This
page is
written
in
darker
ink, suggesting
that
it
was
added
at
a
later time.
[50]"Im
Falle
I"
should
be
"Im Falle II."
[51]At
this
point
in
the
original text
Einstein indicates
a
note
he has
appended at
the foot of
the
page:
"Die
obige
Formel
zeigt,
dass
sich im
Falle der
Lichtausbreitung
im Vakuum
(n
=
1)
die
Geschwindigkeit
der
Bewegung
der
Lichtquelle
einfach
zur
Vakuum-Lichtgeschwindigkeit
einer ruhenden
Lichtquelle
addieren müsste."
[52]As becomes clear
from the
discussion
in
the remainder of the
paragraph,
Einstein refers
to
the Dutch
astronomer
Willem
de Sitter, who had
found that Ritz's
hypothesis
is
incompati-
ble with
existing
observational data
on
double
stars
(see
De Sitter
1913,
which
was
published
on
1
May 1913).
See
also Einstein's
comments
on
De
Sitter's
paper in
Einstein
to
Paul Ehren-
fest, 28
May
1913
(Vol.
5,
Doc. 441)
and the discussion of this
passage
in
the editorial
note,
"Einstein's
Manuscript
on
the
Special Theory
of
Relativity,"
sec.
III.
[53]"Im
Falle
II"
should
be "Im
Falle I."
[54]See
Laue
1907.
[55]The
undeleted
text
of
[p.
21]
continues
at
this
point (see note
46).
[56]At
this
point
in
the
original text
Einstein indicates
a
note
he has
appended at
the foot of
the
page:
"Dieser
Begriff
ist
eigentlich
unscharf
(Rotation). Ich
möchte
es
aber
vermeiden,
mich bei
Dingen
aufzuhalten,
deren
eingehende Überlegung
für
den
hier
zu
verfolgenden
Zweck
nicht
nötig
ist." The reference
to
rotation
is
probably
an
allusion
to
the
problem
of
a
rotating
disk discussed
in
Einstein 1912c
(Doc.
3),
p.
356.
[57]Einstein
later referred
to
this
approach
as
"practical geometry" ("praktische
Geometrie";
see
Einstein
1921,
p.
125).
[58]For
a
similar discussion of the
concept
of
a
clock,
see,
e.g.,
Einstein 1910a
(Vol. 3,
Doc.
2),
p.
21.
[59]At this
point
in
the
original text
Einstein indicates
a
note
he has
appended at
the foot of
the
page:
"Dies
muss,
wie
Laue
gezeigt hat,
der Fall
sein,
wenn
entgegengesetzt
verlaufende
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