10
DOC.
2
APRIL
1914
Mass
m
is
conducted
on
to
an
orbital
path.
For
quan-
tum
reasons
only
motions at certain rotational
speeds
0
±
w1
±
w2....
are possible.
If
we
influence
adiabatically
with
a
forming magnetic
field
(L
to
the
paper’s
plane),
all these
points
on
the
w
line
experience
a
shift in
the
same sense
through
induction.[4] Once
the
field
has become
constant,
we
have
asymmetrically
distributed
new
possible
w
values
against
the
old shifted
ones, against
w
=
0, even
though
with
a
constant
magnetic
field
the statistical
mechanics of
the
structure
ought
hardly to
differ from those
without
a magnetic
field.
That
is
why
I
doubt
that
through
adiabatic
influence in
the
sense
of conventional
mechanics
possible
conditions
change again
into
possible
conditions.[5]
How
do
you
find
your way
out
of
that?
Frankly
speaking,
I have
no
solution.-
Here in Berlin
I
am
very nicely
provided
for. A
pretty
room
and
an
inter-
esting companion
at
Haber’s.[6]
Otherwise
I
have
not
seen
any
other
physicists.
By
contrast, I
really delight
in
my
local
relatives, especially
in
a
cousin of
my
age,[7]
with whom
I
am
linked
by
an
old
friendship.
That
is
primarily why
I
am
accustoming myself very
well
to
the
large city
which
is
otherwise odious
to
me.
Grossmann wrote
me
that
now
he also
is
succeeding
in
deriving
the
gravitation
equations
from
the
general
theory of
covariants. This would be
a
nice
addition
to
our
examination.[8]
Astronomer Freundlich has found
a
method
to
establish
light
refraction
by
Jupiter’s gravitational
field.[9]
In
addition,
he has established with
astounding
accuracy
the
shift
of
intensity
centers of solar
lines
toward
the
red,
based
on an
American’s
new, very
exact observational
data.[10]
The American’s
trick
consisted
in his
trying
out all
sorts of
artificial
light
sources
until
he
finally
obtained
lines
whose finer
structure
he
could
no longer distinguish
from the
relevant solar lines.
We shall return
to
our
countryside
recreation
plans.[11]
Cordial
greetings
to
both
of
you
and
your
little
children,[12] yours,
Einstein
Amicable
greetings
to
your
wife’s
aunt,[13]
whom
I
thank
very
much for all
the
kindness she has shown toward
me.