DOCS.
485,
486
MARCH
1918 501
myself
with
electrical
measurements,
apparatus,
calculations,
electric.
propulsion
of
mechanical
instruments,
etc.,
a
very
varied and
interesting
field.
In
the last
few weeks I
worked,
on
the
side,
on
the
formation of
electromagnet.
waves
in
a
regularly
laminate
medium
(dynamo-metal
armature
unit,
etc.)
and
am considering publishing
these calculations also under
a pseudonym.[11]
With
such
concrete
problems,
a
positive
result
is naturally
much
more likely.
In
the
hope
that
your
health
is
completely
reinstated
again,
I
remain
with
best
regards, yours,
R.
Förster.
486. From Max Planck
Grunewald,
19
March
1918
Dear
Colleague,
Despite your explicit instructions,
I would still
like to
answer
you immediately,
to
both
letters,
that
is;
the business
one
first. Freundlich should
just
apply
to
the
Academy
with
a
proposal
in which he describes
the
circumstances and
requests
that the
Academy
take
steps
with
the
relevant
authorities
to
have
the
instruments that
were
confiscated in Odessa
returned
as soon as possible.[1]
I
shall
then do all
I
can
to support
this
petition.
It
would
obviously
be advisable
that
F.
report
this
affair to
Mr.
Struve beforehand and
secure
his
approval
of
the
proposal.[2]
For
there
is
no
doubt that
Struve
will
be invited in
the
first
place
by
the
Academy
to
give an
evaluation. If it
comes
out
favorably,
I
then
do not
doubt that the
Academy
will
gladly
take
up
the
matter.
That
is
what it
is
there
for,
of
course.
The other
question
of
the
expedition
next
spring
will naturally
have to be dealt
with
quite separately.[3]
Something
can
be achieved here
only
if
a
tangible
proposal
is
on
hand.
It
will
probably
be
quite
difficult
to
work out
such
a proposal.
I
myself
would
obviously
be
pleased
to do
all
I
can, provided
I
could
see some
feasible
way,
to
contribute
toward
a
positive
outcome.
But
now
to
something
else:
I.
Our
opposing
views
on
the
relation between
entropy
and
probability
can (if
I
understand
yours
correctly)
perhaps
be formulated
as
follows:[4]
Let
us
imagine
in
a
2
Nth-dimensional
phase space (N very large)
the
hy-
persurface
E
=
const. and
designate
the
quantity
(the
surface
area)
of
the
total
surface
as
F,
then
in
my opinion (except
for terms of
no
consequence here)
the
entropy
S
=
k
log
F
+
const. If
we
consider
a
“path
of
phases”
[Phasenbahn]
that
develops
along
this
surface,
in
general,
in
the
course
of time
it
will
not
cover
all