  The topological susceptibility of the quenched QCD vacuum is measured on
large lattices for three $\beta$ values from $6.0$ to $6.4$. Charges possibly
induced by $O(a)$ dislocations are identified and shown to have little effect
on the measured susceptibility. As $\beta$ increases, fewer such questionable
charges are found. Scaling is checked by examining the ratios of the
susceptibility to previously existing values of the rho mass, string tension,
F-pi, and lambda-lattice.
