106
DOCS. 147-150 APRIL
1909
Einstein
sends
him his
"most
recent paper,
which
is primarily critical,
but also contains the
reasons
that
induced
me
to
ascribe
a
kind of
molecular
constitution
to
radiation." The
paper is
Einstein 1909b
(Vol. 2,
Doc.
56).
148.
From
Johannes
Stark
Aachen, Lütticherstr. 189, 8
April
1909
Esteemed
Colleague:
Thank
you
for
your
kind
letter.[1]
Much
as
I
would have liked
to
win
you over,
I
had
to
expect
a
refusal
on
your
part.[2]
Your
last
paper
in
the
Phys.
Zeitschr.[3]
is
understandably
of
profound
interest
to
me;
I
will
study
it
carefully
as soon as
I
find
some
free time.
In
the
hope
that another
opportunity
may
come
along
to
bring
us
together
in the
same
faculty,
I
remain
yours
truly,
J.
Stark
149.
To H.
A.
Lorentz
Bern,
13
April
1909
Highly
esteemed
Sir:
Yesterday I
saw your
paper
on
radiation that
you
published
in
the
Revue Generale
des
Sciences.[1] I
feel
I must
tell
you
how much
I
admired the
beauty
of
your
derivation
of Jeans's
law.[2]
I
cannot
think
of
any
serious
objection
to
this derivation.
The
reading
of
your
paper
has
been
a
real
event
for
me.
Very respectfully yours,
A.
Einstein
150.
To Conrad Habicht
[Bern,] Thursday,
[15
April]
Dear Konrad!
I
am
very glad
that
you
will
come. By
Saturday
I will have
an electroscope[1]
that
allows
the
evaluation of
1
volt.
The
Maschinchen
multiplies
2.105
times.[2]
With
best
regards
to
you,
Paul,
and
your family, your
A.E.