  The polarization of neutral Cascade and anti-Cascade hyperons produced by 800
GeV/c protons on a BeO target at a fixed targeting angle of 4.8 mrad is
measured by the KTeV experiment at Fermilab. Our result of 9.7% for the neutral
Cascade polarization shows no significant energy dependence when compared to a
result obtained at 400 GeV/c production energy and at twice our targeting
angle. The polarization of the neutral anti-Cascade is measured for the first
time and found to be consistent with zero. We also examine the dependence of
polarization on transverse production momentum.
