DOCS.
153,
154 MAY 1909
115
! 1
mRc2
A
-
-S,
m
3
kT
or,
since the
electromagnetic
mass
is
determined
by
that
2
e2
m
=
,
3
Rc
2
y
_
2
e2
A
-
-
S
.
m
9
kT
On the
other
hand,
according
to
Planck
(p.
161),[22]
ßkTX
h
=
m
hence,
if
one
substitutes the
above value
of
Am,
h
=
ißsi.
=
9
c c
which
is
the formula
laid down
by you.
154.
To
Anna
Meyer-Schmid
Bern, 12
May
1909
Esteemed Frau
Anneli:
Your
postcard
made
me
immeasurably
happy.
I
probably
cherish the
memory
of
the
lovely
weeks
that
I
was
allowed to
spend
near you
in
the Paradies
even more
than
you
do.[1]
I
wish
you
much
happiness
with all
my
heart,
and
am sure
that
you
have
become
as exquisite
and cheerful
a
woman
today
as
you
were a
lovely
and
joyful young girl
in
those
days.
So,
now
I've become
such
a
big
schoolmaster that
my
name
is
even
mentioned
in the
newspapers.[2]
But
I have
remained
a simple
fellow who
asks
nothing
of the
world-only
my
youth is
gone,
the
enchanting
youth
that
walks
forever
on
air.-
Miss
Maritsch
has
indeed become
my
wife.
My
sister also
attended
college.
She
is
in
Paris
at
the
moment.
She
is
also
going
to be
married
soon. [3]
Thank
you again
with all
my
heart. Your
old
A.
Einstein
P.S. As
of
15
October
I will be in
Zurich,
mostly
in the
Institute for
Physics,
Rämistr.
If
you
ever happen
to be
in
Zurich
and have
time,
look
me
up
there;
it would
give
me
great pleasure.
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