202 DOC. 10 RESEARCH
NOTES
AD.
[3
006].
These
notes
are
written
in
a
blue bound
notebook,
17.5x21.5
cm, consisting
of
squared
white
paper.
Two
pieces
of
paper
were
probably taped
later
to
the
front of
the
note-
book
by
Einstein's
secretary,
Helen Dukas.
On the back
cover
of
the notebook,
"Relativität"
is
written
in
Einstein's
hand,
probably
an
indication that
he
began
his
notes at
that end. The
first and
last
pages
are
glued to
the
inside of their
respective
covers.
A
margin
of about
1
cm
is
usually
maintained. Entries
are
mostly
in ink. The
book consists of
two parts beginning
from
the
back
and
from
the front,
respectively.
The
material
presented
here
as [pp.
1-9]
be-
longs to
the
part beginning at
the end;
[pp.
10-58]
belong to
the
other
part.
The material
on
[p. 9]
and
[p. 58]
is
on
the
same
page
in the notebook,
upside
down relative
to
one
another. It
is
on
this
page
that
the
two parts
of the notebook
meet.
Before
[p.
58]
three blank
pages
ap-
pear.
Following
[p.
57]
a
page
has
been
torn out
with
a
9
mm
tab
remaining.
A
total of
25
pages
of unrelated material
has been
omitted
and
can
be
characterized
as
falling
into three
parts,
Parts
A, B,
and
C.
The
page designations
that follow for the omitted
parts
can
be
found
on
the copy
of this document
in the
Einstein
Archive,
where
"3 6" is the
archival
designation,
while "32L" indicates
the
left-hand side of
p.
32 and
"38R" indicates
the
right-hand
side of
p.
38.
Part
A
was
written
beginning
from
the
back of
the
notebook
and
consists of
pp. 3
6
32L-3
6 38R
on
the copy; it precedes
[pp.
1-9].
Part
B
comprises the
pag-
es
beginning
from
the
front of
the
notebook,
pp.
3
6
01L-3
6 05L;
these
pages precede
[pp.
10-58].
Part
C
consists of
pp.
3
6
29R-3
6
31L;
three blank
pages separate
this
part
from
p. 3
6
43L
([p.
9]/[p.
58]).
Part
A
documents Einstein's
attempt
at
a
tensorial derivation of
the
ponderomotive
force
density.
Pp. 3
6
36L-3
6
37L
deal with
the
role of electric
polarization in
relativistic electro-
dynamics.
Pp.
3
6
37R-3
6 38R
contain calculations related
to
various
topics, among
them
"Momentum
According to
the Theory
of Radiation"
("Impuls
aus
Strahlungstheorie,"
p.
3
6 37R) and
statistical considerations
on
absorbed
and
emitted
energy
(pp. 3
6 38L and
3
6 38R).
Part
B comprises
various calculations
related
to
the
quantum hypothesis, to
statistical
physics,
and
to
thermodynamics.
On
p. 3
6
02L Einstein derives
equation (195)
of Planck
1906b
by
methods
similar
to
those of Einstein and
Hopf 1910a,
1910b
(Vol.
3,
Docs.
7
and
8).
These methods also
play
a
role
on pp.
3
6
02R-3
6 03R and
pp.
3 6
04R-3
6 05L,
whereas
p.
3
6
04L
is
related
to thermodynamics.
Part
C
contains
notes
on
thermodynamics possibly
related
to
Einstein's
course
on
this
subject at
the
German
University
of
Prague
in
winter
semester
1912/1913.
[1]These
notes are
dated
on
the
assumption
that
they
were
written
no
earlier than
August
1912,
when Einstein
first
adopted
the
metric
tensor
as
the
fundamental
quantity
of his
theory.
[2]Einstein
confirms that
G^
defined
by
the
invariant differential
form
for
ds2
transforms
as a
tensor.
The matrix
display
for
the
coefficients
apn,
is
virtually
identical
to
that of Laue
1911a,
p.
57.
The
same
representation
is
employed
in
Einstein's
manuscript
on
special
rela-
tivity (Doc.
1).
[3]This
special
case
corresponds to
the
static
gravitational
field
as
treated
in Einstein
1912c,
1912d
(Docs.
3
and 4),
provided
c
is
a
function of
x1,
x2,
x3.
[4][Eq.
1]
is the field
term
of
the
gravitational
field
equations
as
given
in
Einstein 1912d
(Doc. 4),
p.
456.
It is
converted
to
[eq.
2]
in
terms
of
y
=
c2/2
=
G44/2.