  Handedness and a left-right asymmetry have been proposed as methods of
probing the polarization of hard jets. If the analyzing powers for these
observables are substantial they would provide useful tools for probing
polarized hard scattering. This paper proposes that comparing these to the
corresponding quantities in beam jets in polarized hadron-hadron collisions
would be useful. These would shed light on the similarities and differences
between the fragmentation of hard and soft jets. They would also suggest
whether there is any useful possibility of measuring jet polarization. The
left-right asymmetry of beam jets has already been measured and is large. But
measurements of the handedness of beam jets have still to be done. They could
be done in an upgraded HERMES detector at HERA.
