668
DOC.
633
OCTOBER
1918
or
one
compares
the
case
concerning
the
dependence
with the
case
massive
lead screen
where each chamber
is
irradiated
by
a
separate preparation.
To
me
the
method of
varying
a
seems
most
natural,
because
no
screens
are
needed,
which
produce secondary 7-rays.
But
obviously
I
know
very
well
that
it
would be ludicrous for
me
to
presume
to
give
you suggestions
on
the
method.
It
is
only
to tell
you concretely
what observations would be
needed.-
The
experimental
resolution of
the
problem
of whether each
decaying
atom
really
does
correspond
to
one
act
of 7-absorption could,
in
principle,
also be
settled
observationally
with fluctuation measurements
using 7-rays.
It
would be
magnificent
if
you
ventured to
tackle this
as
well.
The
paper by
Bär
on
the
deceleration
potentials
interested
me
very
much.[6]
This
muddle
really
ought
to be
put straight
sometime
once
and for
all.
(Elimi-
nation
of
this
physical
Bolshevikism).
Cordial
regards, yours,
Einstein.
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