DOCS.
156,
157 NOVEMBER
1915 155
156. To Hans Albert Einstein
[Berlin,
30
November
1915]
Dear
Albert,
I
received
your
letter
just
now,
the
unkind tone
of
which
dismays
me
very
much.[1] I
see
from
your long delay
and from
the
unfriendliness of
your
letter that
my
visit would
bring you
little
joy.
Therefore
I
consider
it
not
right
that
I
sit in
the train
2
•
20
hours
without
the result
of
making
someone
happy.
I’ll
come
to
visit
you again only
when
you
ask
me
to
do
so yourself.
At
Easter
I’m
going
to
be in Switzerland
anyway,
because I
must
attend
a meeting
in
Berne.[2] I’ll
send
you
the Christmas
present
in cash
as
you
wish.
But
I
do
think
that
a
luxury gift
costing
Fr.
70 does
not match
our
modest circumstances.
Regards
to
you
and
Tete,
yours,
Papa.
157. To
Erwin Freundlich
Tuesday,
[30
November
1915][1]
Dear Mr.
Freundlich,
Many
thanks
for
your
kind notes.
Something
is
still
missing,
though,
namely
1)
The
length
of the
ascending
node for
the
planets,
relative to
the
spring equinox.
2)
The
length
of the
Earth
on
December
6th,
which
according
to
your
information
equals
the
length
of
the
ascending
node for
the
solar
equator
(I
could
actually
calculate
that
from
your
data;
but
you probably
have
this
in tables
there).
3)
The
common
notation
in
astronomy
for the orbit elements
of
planets.[2]
Please add
this
information to
the
slip
and then
send
the
same
back
to
me.-
On
Friday,
Rubens
will
give a
talk
at
the
Phys. Soc.[3]
I
am enclosing
herewith
Naumann’s
letter.
Upon reconsidering
the
man,
he
actually appealed
to
me.
He
is
one
of those not used
to
relying
on
the
authority
of others
but
on
his
own
judgment.
As his
own
reasoning
became
rusty,
he
consequently
had
to
reject
everything
he
was no longer
able to
grasp
entirely.[4]
Best
regards, yours,
A.
Einstein.