DOC.
14
EINSTEIN AND BESSO MANUSCRIPT 449
[p.
42]
(Einstein) (continued)
[196]The
numbers
to
the
far
right
on [p.
42] are
related
to
the conversion of
80
=
1.4
.
10-11,
the motion of the nodes of
Mercury
due
to
the rotation of the
sun
in
radians
per
revolution,
to
seconds of
arc
per century (see
note
231).
The number of revolutions of
Mercury
around
the
sun
per century
is 36500/89
-^
400.
Hence,
400
.
1.4(.10-11)
=
5.6
.
102(.10-11) is
the
value for
80 in
radians
per
century.
The conversion factor
from
radians
to
seconds of
arc
is
1/2
.
(360/7T)
.
3600
-
1/2
.
0.41
.
106 (the
factor
1/2
is
omitted
in the
calculation
here). Hence,
the
product
5.6
.
0.41
=
2.3, which should
be
1/2
.
2.3
.
10-3,
gives
the value
for
5#
in seconds of
arc
per century.