12
DOCS.
7, 8,
9
MARCH
1903
diffusion
to
learn
something
about neutral
salt molecules in
solution.[7]
If
you
do
not
get
what
I have in
mind,
I will
gladly
write it down for
you
in
greater
detail.
If
you
look
at
my
paper
more
closely, you
will find
that
the
assumption
of
the
energy
principle &
of the fundamental
atomistic
idea alone
does not suffice
for
an
explanation
of the
second
law;
instead,
coordinates
p
must exist for
the
representation
c?(p
of
things,
such
that
for
every
conceivable
total
system[8]
Z
=
0.
Both
conditions
are
satisfied
by
Jacobi's mechanical
equations[9]
dpv
=
3E_
dqv
= _
QE
dt
dqv
dt
dpv'
and
I
think that
these
equations
can
perhaps
always
be set
up through
substitutions if
the above
conditions
are
fulfilled. If
that
is
true,
then the entire
generalization
attained
in
my
last
paper
consists in
the
elimination of
the
concept
of force
as
well
as
in
the
fact
that E
can possess an
arbitrary
form
(yet
not
completely)?
You would
do
me
a
favor
if
you gave
a
careful
reading
to
the
paper;
we can
then talk about
it
when
you
show
up
again
in Bern. I find
it
very
difficult to
put together
the
material
for
my
paper
on
molecular
forces.[10]
The
university
here
is
a pigsty.
I will not
lecture there because
it
would be
a
shame
to waste
the
time.[11]
Cordial
greetings
to
you
and
your
loved
ones
from
your
Albert
8. To
Helene
Savic
[Bern, ca.
20 March
1903][1]
Dear Madame Helene:
I cannot pass
up
the
opportunity
to
send
a
brief
greeting
to
an
old
friend
from
my
student
days.[2]
We
too
have
now finally
developed
into
a
perfect
little
married
couple.[3]
I
wish I could
conjure you up
tonight; we are
reading
some
stuff
by
the
Viennese,
Gompertz.[4]
Kindest
regards
to
husband
and
kids[5]
from
your
Albert
9.
From Emma
Ehrat-Ühlinger,
with
Comments
by
Einstein
Zurich
IV,
22 March
1903
To
Mr.
Einstein,
Bern.
In
your
postcard
last
week
you
used the
words
"your
old
lady"
when
you
asked
my son[1]
to
convey