DOCS.
6,
7
FEBRUARY-MARCH
1903
11
Incompl.
semiperm.
membrane
according
to
Sutherland.[22]
Suppose
that
during
the
functioning
of
the
incompl. semip.
membrane
in
the
absence
of
counterpressure
a
certain
quantity
of the
dissolved
substance
passes through.
If the
concentration of the solution
passing
through
remains
unchanged,
then the membrane
is not semipermeable,
and
the
pressure is
0;
if
the concentration
is
0,
then the
pressure
is
equal
to
the
theoretical
osmotic
pressure.
/
\A
pressure
B
--Concentration of
the
solution
passing through
It
seems
to
me
that
it follows from
Sutherland's
conception
that the
line in
the
diagram
would be
a
straight
line from A
to B.
7.
To
Michele
Besso
[Bern] Tuesday
[17
March
1903][1]
Dear
Michele,
Thanks
for
the letter
and
card! I
ought to
have
written
so
many
letters
in recent
days-this
is
my excuse,
and it
applies
to all
of
them,
because I have not
written
a single
one.[2]
First of
all
the[3]
--v
=
0. If
one
interprets
p1
...
pn as
coordinates
9pv
in
an
n-dimensional
space,
then the
system
corresponds to
a
point.
e
is
the
density
of
points,
sipv are
the
components
of
the
material
flow,
and
the
above
expression
the
solenoidal condition. The condition that E
be the
only
integral
of the
equations
of
the
given
form[4] is
no
limitation,
since
I
free
myself
of it
when
I
consider
influenced
systems.[5]
Your
note
concerning
seems unobjectionable
to
me.[6]
Have
you
calculated the absolute
size
of the
ions
under the
assumption
that
they
are
spheres
and
that
they are large
enough
to
permit
the
application
of
the
equations
of
the
hydrodynamics
of
viscous
liquids?
Given
our knowledge
of
the
absolute
size
of
electrons,
this would
certainly
be
a simple
matter.
I
would have
done
it
myself,
but
I
do
not
have
the
necessary
literature
and
the
time for
it;
you
could also
make
use
of
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