  We report on a lattice QCD estimate of the quark spin fraction of the proton
spin. The estimate is arrived at by means of a lattice QCD simulation of the
polarized proton matrix element of the Adler-Bell-Jackiw anomaly. The
preliminary result of the simulation is that this fraction is rather small.
This is in accord with the interpretation of the EMC experiment that the quark
spins are responsible for very little, if any, of the proton spin. (Talk given
at the Adriatico Research Conference on Polarization Dynamics in Nuclear and
Particle Physics, Trieste, January, 1992) NOTE: This paper is available only in
postscript form.
