DOC.
20 137
Doc. 20
Review
of
M. PLANCK,
"On
Clausius'
Theorem
for
Irreversible
Cycles and
on
the Increase
of
Entropy"
(Philosophical
Magazine
and
Journal
of
Science
9
(Series
6)
(1905):
167-168)
[Beiblätter
zu
den
Annalen
der
Physik 29
(1905):
635]
In
response
to
some
objections
raised
by
Mr.
Orr
(Beibl. 29,
p. 237) [1]
against
the treatment
of the fundamental
laws of
thermodynamics
presented
by
the
author,
the
author
explains
that
he used
the
expressions
"reversible"
and
"irreversible" in the
same
sense
as
Clausius.
He
denies that
he
applied
the
[2]
above concepts
in
a
way
that differed
from
that in
which he
defined
them.
The
author admits that
one
cannot
talk about the
temperature and
density
of
any
small
parts
of
a
tumultuously
moving
gas,
and
about their
entropy,
unless
one
wants to
make
use
of the kinetic
theory
of
gases.
Finally, he
finds
that the
[3]
line of
proof proposed
by
Mr.
Orr
coincides in
principle with that
presented
by
Lord
Kelvin
and that it contains circular
reasoning. [4]
Doc. 21
Review
of
E.
BUCKINGHAM,
"On
Certain
Difficulties
Which
are
Encountered
in
the
Study
of
Thermodynamics"
(Philosophical
Magazine
and
Journal
of
Science
9
(Series
6)
(1905):
208-214)
[Beiblätter
zu
den
Annalen
der
Physik 29 (1905):
635]
The
author
starts from
an
article
by
Mr. Orr (Beibl. 29,
p.
237)
and
[1]
expresses
his
agreement
with the results
of
the critical considerations
contained in
that article.
Further,
he
gives expression
to
his conviction
that it is
impossible to
derive the Clausius
inequality
(
dQ/T
0
from the
second
law-as formulated
by
Lord
Kelvin-without further
assumptions. The
article also contains
some
critical
remarks
on
Mr.
Orr's
paper.
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