A study has been made regarding the influence of end volumes on time‐dependent cataphoretic gas separation in the positive column of a dc glow discharge containing 0.05% neon in helium. The neon 5400‐A˚‐line intensity was monitored at several fixed points within the positive column of the discharge. The experimental data are compared with theoretical predictions based on the model formulated in the concurrent paper. The simplified model predicts the general features of time‐dependent cataphoretic gas separation for the two end volume configurations considered.