Inviscid flow of a wall jet of width h along a circular wall of radius r is calculated using formulae (27) and (29) from L.C. Woods: "Compressible subsonic flow in two-dimensional channels with mixed boundary conditions", in: Quart. Journ.Mech.and Applied Math., Vol VII, Pt.3 (1954). The deviation angle must be given for the calculation: the angle found in experiments made by the author M. Kadosch in 1956 was chosen, and is here compared with the separation angle found in a calculation of the separation of the boundary layer due to the calculated pressure gradient along the wall (Kadosch M.: "The curved wall effect" in: 2nd Cranfield Fluidics Conference, Cambridge, 1967-01-03). Also this theoretical pressure is compared with the experimental pressure along the wall found by the author Kadosch M.: "Déviation d'un jet par adhérence à une paroi convexe", in: Journal de Physique et le Radium, Paris, Avril 1958, p. 9A