98
DOCS.
135,
136 JANUARY 1909
135.
From
Alfred
Schweitzer[1]
Zurich, 19 January
1909
The
Physical Society
of Zurich
Fed.
Physics Building
Zurich
V,
Gloriastrasse
Esteemed Dr. Einstein:
Thanking
you
very
much for
your
kind
letter of
the 9th
inst.,
I wish to
inform
you
that
your
lecture
will
take
place
in Prof.
Kleiner's lecture
room.[2]
On
behalf of
Prof.
Kleiner,
as
well
as on my own
behalf,
I
take
leave to
request
you
not
to
make
your
lecture
too
difficult,
so
that
it
can
also be followed
by
nontheoretical
physicists.
I
will
send
out
invitations
to
your
lecture
not
only
to
the members
of the
Phys.
Society
but
also
to
all
the Zurich
mathematicians;
I
will also send
10
invitation
cards
to
you
for
your private
use.
Very respectfully yours,
A. Schweitzer
136.
From Wilhelm
Wien
Würzburg, Pleicherring 8,
19 January 1909
Esteemed
Colleague:
Forgive
me
for
sending
you your
note
once more.
But
I
must confess
that the
note
is
still not
completely
clear
to
me,
and since I
must
assume
that
this will also be
the
case
with
many
readers of
the
Annalen, I
would like
to
ask
you
to
work
out
your
presentation
in
somewhat
greater detail.[1]
Equation I
of Mirimanoff
is
identical
with Minkowski's
eq.
III"a
(p. 76)
if
one
sets
curl
[P*D]
=
curl[roS]

curl
[idĐJ?][2]
He
says
that
his
equation
is
identical
with
that of
Lorentz,
but
differs from
that
of
Minkowski
by
the
term
curl(OPtD).
Mirimanoff's
vectorsŪ, 3), Q, 35
do
not
differ from Minkowski's
system S,
5), , 23.
But
Mirimanoff
expressly says
that
his
Q
is not
supposed
to be
identical
with i).
Rather,
Minkowski's
· )
is supposed
to be
identical
with
the
in his
equation
$[CPŧ]
=
Q
If
this
is
allowed,
then Mirimanoff's
system
cannot be
identical
with
that
of
Minkowski,
whereas
one
would have to conclude from
your presentation
that
Mirimanoff's
equations
do not differ
at
all from
those of
Minkowski.[3]