DOC.
22
SOLVAY DISCUSSION
REMARKS
559
der Moleküle
entgegensetzt,
wie das
Gesetz
des
osmotischen Druckes durch
den Widerstand bestimmt
wird,
den die
thermische
Agitation
einer Beschrän-
kung
des
dem Molekül
bei
seiner
Diffusionswanderung
zur
Verfügung ste-
henden Raumes
entgegensetzt.
Es ist
deshalb
von
höchster
Wichtigkeit,
zu
erfahren,
ob die
Gültigkeit
des Curie
Langevin'schen
Gesetzes bei tiefen Tem-
peraturen prinzipiell
aufhört.
Genauer
gesprochen,
es
entsteht
die
Frage:
Ist
das
Curie-Langevin'sche
Gesetz
an
solche
Freiheitsgrade
der Rotation
gebun-
den,
welche
in
normaler Weise
(d.
h.
der statistischen Mechanik
entsprechend)
zur
spezifischen
Wärme
beitragen?
Die
experimentelle Beantwortung
dieser
Frage
wird
uns
nach meiner
Meinung
lehren,
ob beim absoluten
Nullpunkt
der
Grad der
geometrischen Ordnung Entropiedifferenzen
mit sich
bringt
oder
nicht;
ergeben
die
Experimente
das letztere,
so
wird
an
der exakten
Gültigkeit
des
Nernst'schen Theorems wohl kaum mehr
zu
zweifeln
sein.
AD
(FPAS) [74 636]
and PD
(BBU,
Fonds des Instituts internationaux de
Physique
et de Chimie
Solvay,
11Z).
These discussion remarks
are
either based
on
numbered
manuscript
notes
in FPAS
or
on an unpublished printed
version of the
proceedings
of
the second
Solvay Congress,
abbreviated
as
PSSC and located
in
BBU.
Handwritten remarks
were presumably
jotted down
by
the
participants as
immediate
responses
to
the
lectures
on
which
they
commented. Assembled
by
the
secretaries
of
the
Solvay
Congress,
they appeared eight
years
later in French translation
in Rapports
1921.
Einstein's
comments
are
written
in
black ink
on slips
of
paper
of
varying quality;
these
slips
have been inserted in
one
of
two
notebooks, the first
page
of
which contains
the
inscription: "Registre contenant
des
pieces
manuscrites
concernant
les
premiers Congres
de
physique Solvay
offert a
l'Academie
des Sciences
en
la
seance
du
19 decembre
1951 par
Maurice
de
Broglie."
The
secretaries of the
Congress assigned
a
number
to
each discussion
contribution,
corresponding
to
the order of the
interventions
during
the
Congress.
The
unpublished
version
of
the
proceedings
of the second
Solvay Congress (PSSC) was printed
in 1916,
though never
disseminated because
of
the First World War.
It
contains the
texts
of
all
lectures and discussion remarks
in
their
original language.
H.
A.
Lorentz
played a major
role
in
preparing
the
manuscript
(see
Einstein
to H. A. Lorentz, 2
August
1915).
The discussion
fragments are preceded by
editorial
commentary,
which
gives
the
name
of the
lecturer,
summarizes the
content
of the lecture and the discussion
to
which Einstein
responds,
pro-
vides the number
assigned
to
the
fragments by
the secretaries
of
the
Congress, notes
the
placement
of
the relevant
text
in PSSC and
Rapports
1921,
and characterizes variations between the
manuscript
and the version in PSSC. Where discussion remarks do
not
exist
in
manuscript
form,
the
text
is
based
on
PSSC.
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