384 DOCS.
386,
387
OCTOBER
1917
everyone
will
certainly
be
in
agreement.
I
also
am
willing
to
meet
you
in
the
library[3]
at
a
time
specified by you,
if
you
deem this useful.
Very respectfully,
A.
Einstein
Telephone: Nollend[orf]
2807.
Recipient’s
note:
“9
October
1917.
N.B.:
To
be answered
that
I shall
convene
the
meeting
as
soon
as
the
Koppel
Foundation
has
named its
representative,
von
Harnack.”
387. To
Edouard Guillaume
[Berlin,
9
October
1917]
Dear
Guillaume,
That
parameter t just does
not
exist.[1]
The
equation
u'
=
ß(u
-
ax)
excludes
both
of
the
equations
u
=
ct
u'
=
c't,
from
which,
rather than
and in
contradiction
to
the
above
equation,
the
equation
u'
=
const

u
would indeed
result.-
Should
I
really
let
this
be
printed
in the
Archives? I
unfortunately
did not
receive
your
earlier
letter.
My
move was
being
attended
to
precisely
during
my
absence from
Berlin.[2]
If
my
health
improves by
next
year,
I shall
come
again
to
Berne.
Then
we can
discuss these
matters.
For
the
moment, however, you
will
see
from
the
simple
statement above
that
your
method
is
not feasible.
I
also
recommend
geometric
illustration
to
you.
With best
regards
also
to
your
wife,[3]
I
am
yours,
A.
Einstein.
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