DOC.
1
MECHANICS LECTURE NOTES 125
2)
Falls
m
als Konstante
gesetzt
wird,
dass
die
Grösse der Beschleuni-
gung
(d2xdt2)2
+
(d2ydt2)2
+
(d2zdt2)2
proportional
ist
der
Grosse
der
Kraft
Jx2
+
Y2
+ Z2
Wenn
nun
die
wirkende Kraft
nicht
die
unserer
Messfeder sondern
irgend
eine
andere Kraft
ist,
so
wird sie durch
diejenige
der
Messfeder
ersetzt,
welche
dieselbe
Bewegung
erzeugt.
Dann
gilt
das bisher
Gesagte
für
beliebige
Kräfte.
AD.
[3
004, 3 005].
This document
is
preserved in two notebooks,
17.5 x
21.5
cm,
of white
squared paper,
and
is
mostly
written
in ink,
with
some
portions
in
pencil.
Pagination
in
square
brackets
refers to
pages
in the notebook and is
displayed
in
the outside
margins
of
the
tran-
scription.
Pages
that
are
omitted,
such
as
blank
pages
or pages
containing
unrelated
material,
are
not
numbered.
The
first
notebook contains the material
presented
as
[pp. 1-94]
of
the
notebook.
On
the
flyleaf
the
following
notes
are
made
in
pencil:
"Über die Rolle der Atomtheorie
in
der
neueren
Physik" (the
title of Einstein's
inaugural
lecture
at
the
University
of
Zurich, given
on
11
Decem-
ber
1909),
"Dienstag,"
"Mittwoch,"
"Montag
10-12," "Samstag
10-12,"
and
"Mittw
5-7
Ther-
modyn" (in
addition
to mechanics,
Einstein also
taught thermodynamics in
the winter
semester
1909/10;
see Appendix B,
"Einstein's Academic
Courses").
The notebook also contains three loose
sheets.
One bears the
heading,
"Some
empirical facts
of fundamental
importance
for the
theory
of
light
propagation.
(Addendum to
§7)" ("Einige
Erfahrungsthatsachen,
welche
für die Theorie
der
Lichtausbreitung
von
fundamentaler
Bedeu-
tung
sind.
(Ergänzung
zu §7)");
this
heading is
apparently
related
to
Doc.
1
in Vol.
4 but
is
followed
by
calculations
that
possibly refer to
the
propagation
of
light
quanta.
The
verso
of
this
sheet
presents
calculations that
seem
to
be concerned with kinetic
theory
and that
are perhaps
related
to
material
in
the second
notebook;
similar calculations
are
found
on
a
second
sheet.
This sheet also contains
references to
"Massen
von
Eddington," "Geschwindigkeiten,"
and
"Grösse
der Sternhaufen."
The third sheet has
thermodynamic
calculations
on
the
top
half
and
a
calculation related
to
the
problem
of the
catenary on
the bottom
half.
This material
is
omitted.
The notebook concludes with
two pages
written
upside
down and
beginning
from the
back,
containing
an
alternative derivation
of
the fundamental
equations
for
a
material
point.
These
pages
are
printed
as
[pp. 116-117]
of
the
notebook.
The
lecture notes
continue
in
the second notebook.
Following
the material
presented
here
as
[pp. 95-115],
this notebook contains the
following
additional
material,
which
is
omitted:
numerical
computation
and
graphical integration
of
two
functions and
a
calculation
on
kinetic
gas theory (all perhaps
related
to
material
on
the
two
loose sheets
in
the first
notebook),
calculations
on
general relativity
and
a
graphical representation
of
a
function
(on
both
sides
of
a
loose
sheet),
and, starting
from
the
back and
upside
down from the other
material,
seven
pages
of notes
in
Mileva Einstein-Maric's
handwriting, containing
material
very closely cor-
responding to
the
introductory
sections of
the first notebook,
followed
by
an
eighth page
with
a
drawing
of three
intersecting
circles,
also
in
Einstein-Maric's hand. The remainder of the
notebook consists of blank
pages
and
the
remnants of
one
torn-out
page.
[1]Dated
on
the
assumption
that
Einstein
prepared
these
notes
for
his
course
in
the winter
semester
1909/10
at
the
University
of
Zurich, 18
October
1909 to
5
March
1910; see
Zürich
Verzeichnis
1909b,
title
page.