Gas-liquid bubble-flow was studied in a flat bubble column with rectangular cross-section. The bubble column was locally aerated through a frit sparger, located in the central part of the bottom plate. The experimental techniques used comprise photographic documentation of the bubble distribution as well as LDA measurements of the liquid velocity. The influence of the liquid level (aspect ratio) in the bubble column and of the gas through-put on the hydrodynamic behaviour of the column has been investigated. Al aspect ratio of 1 steady state flow was observed with one circulation cell spread over the full width of the column. This differs from the flow behaviour in a uniformly aerated flat bubble column, reported by Chen, Jamialahmadi and Li (Chemical Engineering Research and Development 67 (1989) 203-207), who observed an essentially symmetric flow field with two stationary circulation cells. At aspect ratios of 2 and 3 the two-phase flow has a transient character with two staggered rows of vortices moving downwards in a periodic way. The long-time averaged liquid velocities obtained from the LDA measurements showed a symmetrical flow field, which is referred to in the literature as the "Gulf-stream" or "cooling-tower" pattern. The experimental results were compared with numerical simulations based upon the dynamic turbulent three-dimensional two-phase Euler-Euler model presented in Part I(Sokolichin and Eigenberger, Chemical Engineering. Since (1999) in press). (Good qualitative and quantitative agreement was found for the steady state as well as for the transient case.