A study was made of the reattachment of an incompressible, two-dimensional turbulent jet to an inclined surface in streaming flow, when the main stream is uniform and parallel to the surface. It was found that the flow is uniquely determined by the angle of blowing relative to the surface and the ratio of the jet-to-streaming-flow velocity, and is independent of the jet Reynolds number when the latter exceeds 6000. The width of the slot and the thickness of the upstream boundary layer do not affect the reattachment distance when their respective lengths are small in comparison with the length of the plate downstream of the slot. The flow is sensibly unaffected by the addition of roughness to the plate as long as this covers the entire surface near the separation bubble. Exploratory measurements were also made of the effect of a nonuniform streaming flow with constant adverse pressure gradient. An analysis of the flow for constant pressure is proposed and is used to extend the experimental results to other jet angles. (Author).