148
DOCS. 197-199 JANUARY-MARCH
1910
P.S.
What
you say
in
your
letter about the constitution
of
Roentgen
rays produced by
deceleration
amounts,
as
far
as
I
can
see,
to
our
relinquishing
the
electromagnetic
explanation
of the
spatial
distribution
of the
intensity
of
Roentgen
radiation that
you
gave
in
your
fine
paper
in
December
(Phys. Zeitschr).[10]
Quite
apart
from
that,
this
conception
can
only
be
satisfactory,
in
my
opinion,
if
a
construction of
such
a
kind would
also work
out
for
light.
For,
after
all,
the
production
of cathode
rays by light
and
by
Roentgen
rays
must
certainly
be
based
on
processes
that
are
identical
in
principle
(only
quantitatively different).
I have
really grown
quite
fond
of
Prof.
Kleiner,[11]
the
head of
our
institute.
My
fears
regarding
the
laboratory
were
rather
well
founded.
However,
this does
not
hurt
me [so]
much
for
the
time
being,
because
my
direct
responsibilities
demand rather
much
of
my
time.
198.
To
Conrad Habicht
[Zurich,
4 March
1910]
Dear
Konrad,
When
do
you
have
your
vacation?[1]
I
am
inviting you
herewith
to
stay
with
us,
so
that the
two
of
us
together
can
do
the
final
experiments
with
the
Maschinchen
& piece
together
the
paper.[2]
The
thing
must be done,
so
that
no
one can can
beat
you
to
it.
We
have
a
spare
room
for
you
&
your
brother,
in which the
two
of
you
can
make
yourselves
right
at
home. But
please
do
bring
me
my
Boltzmann at
long
last.[3]
I
need
it
without
fail
because
next semester I
will
be
lecturing
on
the kinetic
theory
of heat.
I
would like it
best of
all if
you
could send
me
the book
immediately
by
mail. Send
me an
answer very
soon.
Your
A.
Einstein
Best
regards
from
my
wife
(me
too).
199.
To Jakob
Laub
Zurich, 16
March 1910
Dear
Mr. Laub:
I
enjoyed
your
letter
very
much,
even
though
it
is
full
of Abraham's
pushing
and
shoving.[1]
He
must be
a
strange,
immoderate
man.
Even his
judgment,
which
is
otherwise
so
acute,
seems
to be
affected
by
his
passion.
I will
gladly
concede that
he
calculates
better
than
I
do,
that
he
had mastered
more
books
than
I
have,
and
whatever
else he wants.
That there
should be
a special
mathematical
way
of
thinking
surprises me;
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