🚀 go-pugleaf

 The maximal shift appeared in 4 compass-directions 
of the setup, so not on a 24 hour cyclic basis.
There might indeed be some fixed thing in the setup
that would do it, but the point is that Brillet
and Hall designed their experiment precisely
`to be free of spurious effects'.

It should not be forgotten that their experiment
is the most preciese Michelson-Morley experiment
to date (here I am quoting Hayden) and confirmed
a lack of exta-terrestrial ether-drift to an
unbelieevable 16 m/sec.

I am not an experimentalist, so I won't try to 
find experimental mistakes -if any.
In view of the above, I am inclined to have some
confidence in Brillet and Hall's results. But the
idea of this posting is to get people more qualified
than myself interested in this puzzle.

marc van loo.