DOCS. 457-459
JULY-AUGUST
1913
345
457. To
Leonid Mandelshtam
[Zurich,
23
July
1913][1]
Dear
Mr.
Mandelshtam,[2]
I have
just
given a
lecture
at
our
colloquium
about
your
fine
work
on
surface
fluctuations,[3]
which Ehrenfest[4]
had
already
told
me
about.
It
is
a
pity
that
we
do not
have
you
here
in
person.
With
best
wishes, your
A.
Einstein[5]
458.
To
Paul Hertz
[Zurich,]
27
August [July?
1913][1]
Dear
Mr. Hertz,
Unfortunately,
at
the
beginning
of
August I
will be
away
on a
long-planned
trip.[2]
But
please keep
me
up to
date
with
your
address.
I
shall be back in
the
middle
of
August,
however,
and shall be
delighted
if
you
come
to
see me.
Then
I
will also tell
you
why
I
cannot
retain the
given
derivation of
Planck's
formula.[3]
With
best
wishes,
your
Einstein
459. From Ida Einstein
Osnabrück, Wittkopstrasse
1a.
3
August
1913
Dear Albert-
Since
a
few
days
ago
I
am
here
with
my
husband[1] & Edith[2]
on a
visit to
my
loved
ones,
&
am
sending
my
warmest
greetings
to
you
&
your
dear
wife &
sincerest thanks
again
for the
lovely evening
I
had
at
your
house.-
I
found Auntie
& Emma[3]
feeling
well in
their
very
beautiful
home. We will return to
Weggis[4]
around the
16th
together
with
Auntie
&
I
hope
to
have
you
there
soon.
I
wish
you
an
enjoyable
trip to
Maloja.[5]
Your
Aunt Ida