An Attractive Proposition (was - Space Elevator is itpossible?)

Painius wrote,

...the first experiment that was not
vertically polarized spelled the doom of
the aether long before vertical-arm
interferometers were invented and used.
Moreover, the verticals didn't work for a
different reason...

Yes, even if a MM type interferometer were made with a vertical arm, the
vertical arm will be 'stretched' in the spaceflow, which will exactly
cancel the expected fringing. The null result will again be obtained.
Nature hides her secret well. :-)