  We calculate the form factor of the quark energy momentum tensor and thereby
extract the quark orbital angular momentum of the nucleon. The calculation is
done on a quenched $16^3 \times 24$ lattice at $\beta = 6.0$ and with Wilson
fermions at $\kappa$ = 0.148, 0.152, 0.154 and 0.155. We calculate the
disconnected insertion stochastically which employs the $Z_2$ noise with an
unbiased subtraction. This proves to be an efficient method of reduce the error
from the noise. We find that the total quark contribution to the proton spin is
$0.29 \pm 0.07$. From this we deduce that the quark orbital angular momentum is
$0.17 \pm 0.08$ and predict the gluon spin to be $0.21 \pm 0.07$, i.e. about
40% of the proton spin is due to the glue.
