94
DOCS. 128-130 NOVEMBER-DECEMBER
1908
I
share
your
opinion
that
one
must
look for
a
model that
explains
all
of the
consequences
of
the
theory
of
relativity,[13]
and there
I
am
of the
opinion
that the ether-
vortex
theory
of
matter,
in
which
ether
and matter
are
of
an
identical
nature, is most
likely
to lead to
success.[14]
This
model
will
then
have
to
explain,
above
all,
the
deformation that
an
ether
vortex
experiences
due to
translation. Poincare's
hypothesis
of
an
ether
pressure
will
then
have
to
be
explained
from
the ether
model. This
seems
to
me
very
difficult to
achieve.[15]
The
point
of
view
that
has
been
achieved in
the
meantime,
namely,
that
one
can
calculate
everything purely
phenomenologically,
is
already
a
great
achievement.
Sincerely yours,
A. H.
Bucherer
129.
To Johannes
Stark
Bern, 2
December
1908
Highly
esteemed Professor
Stark:
Thank
you very
much for
having
sent
me your
paper.
I
was
especially
pleased
with
the
application
of the
light
quantum theory
to
the
Doppler
effect
curve.[1] I
am
just
at
the
point
of
having
to decide
whether
to
take
it
upon
myself
to
write
that book for
the
Hirzel
publishing
house.[2]
I
hope
that
I will be able to
take
on
the
project
even
though
I
am
terribly
overloaded
with work. In
any case,
thank
you
for
having
brought
me
to
the
attention of the
publisher.
Respectfully
yours,
A.
Einstein
130.
To
Albert
Gockel
Bern, 3
December
1908
Highly
esteemed Professor
Gockel:[1]
I
gratefully accept your
kind
offer,
and therefore
ask
you
please
to send
me
the
Maschinchen
as soon as possible
(Aegertenstr.
53).
The
friend who built
the
Maschin-
chen for
me
will be
staying
with
me on
Saturday
evening
and
Sunday,
and I would like
to
run
the
experiment
with
him.[2]
Please also send
me
the
wooden
pulley
if
you
have
it.
I
had
a
good
local
mechanic
construct
a
second
Maschinchen,[3]
and I have
myself
constructed
a
fairly
sensitive
electrometer,[4]
so
that
I
can now
also call such
a
"laboratory"
my own.[5]
So
far
I have
found that
with
the
Maschinchen
one
can measure
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