626 APPENDIX
A
vation of the
law
of
photochemical equivalence (see
Einstein
1912b
[Doc. 2]).
The
notes
suggest
that Einstein
next recapitulated
the
basic
principles
of statistical mechan-
ics,
and then discussed
capillarity, hydrodynamics,
the second
law
of
thermodynamics,
and
finally
various
problems
of static
electricity
and
of
electromagnetism.
His treat-
ment
of the
hydrodynamics
of viscous
flow,
which refers
to the
work of Kirchhoff
and
Lamb,
includes
a more
extensive discussion of
the
generalized
tensor
concept,
which Einstein had mentioned
in his
course on
the
mechanics of continua
(see above).
3. WINTER SEMESTER
1913/1914
a.
"Elektrizität
und
Magnetismus"
(4
hours)
Several notebooks
are
available that
are
related
to
Einstein's four-hour
course on
electricity
and
magnetism
in
winter
semester
1913/1914. In the first
place,
Einstein's
own
notes
on
part
of
the
course are
preserved.
They
are
in
a
notebook,
the
first
part
of which
was
prepared
for
his
course on electricity
and
magnetism
in
winter
semester
1910/1911
(see
Vol.
3,
Doc.
11),
while the last
seven pages
are
published
in this
volume
as
Doc.
19.
In addition,
two sets
of student
notes
are preserved,
one by
Sidler,
the other
by
Dällenbach, and
both
are
based
on
the
course
in winter
semester 1913/
1914.
These notebooks
complement
one
another
and
permit a quite accurate
recon-
struction of
the contents
of Einstein's
course.
Sidler's
notes in
two
notebooks of
299
and
183
manuscript pages (SzZE
Bibliothek, Hs. 1067:14
and
1067:15)
cover
the
entire
course,
with
the
exception
of
a
final
section
on
gravitation;
Dällenbach's
notes
cover
the
first
part
of
the
course
in
a
notebook of
192
manuscript pages (SzZE
Bib-
liothek, Hs. 304:1225),
while of
the
second
part only
the
sections
on
covariant elec-
trodynamics, hydrodynamics,
and
gravitation
are
discussed
in
a
notebook of
89
manu-
script pages (SzZE Bibliothek,
Hs.
304:1226), including
40
pages
devoted
exclusively
to
gravitation.
Apart
from minor
differences,
which have been noted
in Vol.
3,
the editorial
note,
"Einstein's Lecture
Notes,"
sec. IV,
the
first
part
of Einstein's winter
semester
1913/
1914
course closely
resembles
his
course
at
the
University
of Zurich. The
following
description
will
therefore focus
on
the second
part,
which
is
his first
systematic expo-
sition of the
theory
of
relativity
to
students. With
the
exception
of
the
part
on
gravi-
tation,
this
description
is
based
primarily
on
Sidler's
very
detailed
notes,
even
for
those
parts
of the
course
(energy-momentum conservation,
electrodynamics
of
pon-
derable
matter,
and relativistic
hydrodynamics)
that
are
also covered
by
Einstein's
notes (Doc.
19),
which have rather the character of
a
condensed memorandum than
of
a
detailed outline.
Einstein
apparently began
with
a
discussion of Lorentz's electron
theory
and its
significance
for the
development
of
the
theory
of
relativity.
He
claimed that the
theory
of
relativity
had
essentially emerged
from
the
theory
of ions
in
motion, and
then
discussed the
experiments
of
Rowland, Eichenwald,
and
Fizeau
as
evidence
in
favor