21.
"Theory
of
Relativity"
[Einstein
1915b]
Received before
21
October
1913 and
after
24
October
1924
Published
1915 and 1925
In:
Die
Kultur der
Gegenwart.
Ihre
Entwicklung
und ihre
Ziele. Paul
Hinneberg,
ed.
Part
3, sec. 3,
vol.
1,
Physik.
Emil
Warburg,
ed.
Leipzig:
Teubner,
1915,
pp.
703-713
(the
first
section of
the
paper),
and in Die Kultur der
Gegenwart.
Ihre
Entwicklung
und ihre
Ziele. Paul
Hinneberg,
ed. Part
3,
sec. 3,
vol.
1,
Physik.
2d
rev.
ed.
Ernst
Lecher, ed.
Leipzig
and Berlin: Teubner,
1925,
pp.
794-797
(section
II
of
the
paper).
This
paper was reprinted
in
revised
form
in
Die
Kultur der
Gegenwart.
Ihre
Entwick-
lung
und ihre
Ziele. Paul
Hinneberg,
ed. Part
3,
sec.
3,
vol.
1,
Physik.
2d
rev.
ed.
Ernst
Lecher, ed.
Leipzig:
Teubner,
1925,
pp.
783-797
(Einstein
1925b).
Textual
changes
are
annotated.