70
DOCS.
97-99
MAY
1908
97.
From Karl
Jaberg[1]
Bern, 12
May
1908
Dr. Einstein, Priv.
Dozent,
Bern
Esteemed
Sir:
Would
you
be
so
kind
as
to put
the
exact
address
on
the
enclosed
postcard
and send
it on?
I
misplaced
a
letter of
your
sister's.[2]
Thanking
you
in
advance, respectfully,
K.
Jaberg
98.
From Heinrich Burkhardt
Zurich
V, Kreuzpl.
1
[17
May 1908]
Highly
esteemed
Dr.
Einstein:
My
sincerest thanks for
kindly sending
me
your papers; they
are
of
great
interest
to
me.
I
very
much
regret not
having
encountered
you
at
the
recent
meeting
of
physicists;[1]
I
would be
delighted
if
you
visited
me
the
next
time
you happen
to
be in Zurich
again.
Yours
truly,
H.
Burkhardt
99.
From Paul Habicht
Basel
Sunday,
17
May
1908
Dear
A. E.
Last
Sunday
I
was
in Baden,
where
my
people
are now staying.[1]
I
remained
here
today
in
order
to
make
the
drawings
for
the
circuit breaker.[2] I
now
have
the
thing
in
pencil
and
paper
but
it has
gotten
so
small
that I'm afraid
it's
too
small.
The
reason
why
I
am
drawing 3
detailed
designs
is
to
prevent
the circumvention
of the
patent
in
England etc.,
where the
patents
are
registered
designs,
and
only
a
design
that
is
very
closely
related
to the
one
drawn is
protected.[3]
But if
you
think that
one can
protect
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