In Part I the entrance flow of a Newtonian liquid into a slit was analyzed, starting from the Jeffery‐Hamel Theory. This resulted in some as yet unproven predictions concerning the velocity and stress distribution. A suitable cell was designed and used to test these predictions. The velocity distribution was determined by tracer particles (bubbles) and the stress distribution by flow‐birefringence. By using suitable inserts the entry angle α was changed between a flat entry(α=90°)andα=14°.The essentially Newtonian liquids used were polybutene H‐1900 of 5000 P viscosity and the epoxy resin Lekutherm X‐30 of about2×106 P.Under isothermal steady‐state conditions, considering the theoretically necessary, but unrealizable “point sink” assumption, the results confirmed the predictions of the theory concerning both the velocity and stress distribution. The results are very similar to the published ones on molten polymers, showing that the main influence in the entrance‐flow is geometrical, covered by the proposed theory.