DOCS.
116,
117
AUGUST-SEPTEMBER
1908 83
116.
From Maurice
Solovine
[Paris,
18
August 1908]
It
was a
pleasure to
read the
note
that
you
sent
me.[1]
With
many
thanks and cordial
greetings,
M. Solovine
117.
From
Alfred
Bucherer
Bonn, 7 September
1908
Highly
esteemed
Colleague:
First of
all,
I
would like
to
take
the
liberty
of
informing you
that
I
have
proved
the
validity
of
the
relativity
principle
beyond any
doubt
by means
of careful
experiments.
The
experimental
design
might
be known
to
you
from
my
note
in
the
Physikal. Zeitschrift.[1]
c
The
way
I
undertook the
test
was
to calculate
-
(spec, charge
for ß
=
0)
from
the
m0
experimental
data
and from
the
electromagnetic
mass as a
function of
velocity,
both
for
the
relativity
principle
and for Maxwell's
original
theory.[2]
It turned
out
that
-
is
_i
m0
constant
for the different
ß
only
for the
mass m
=
m0(1
-
ß2)
2.
ß
10-7
x
-
relativit.
10-7x
-
according
to
m0
princ.
m0
Maxwell
0.3178
1.695 1.676
0.3792
1
706 1.678
0.4286
1
706 1.670
0.5160
1
704 1.648
0.6879
1
705 1.578
The
first
experiment
with
ß
=
.3178 did not
give
an
excellent
agreement
because the
time
of
exposure
was so
long
and
the
regulation
of
the current in
the
solenoid[3]
was
therefore
very
difficult
(62
hours of
exposure).[4]
The
aim
of
my
first
experiments
was
to
investigate
the
deflection of electrons
flying
diagonally
to
the direction of
the field.
If the
velocity u
forms
an angle a
with
H,
then