  Utilizing a hydrodynamical model for the freeze-out stage in heavy-ion
reactions, we extract from resolved transverse hadron spectra at midrapidity an
inverse slope parameter (temperature) $T_{Pb} =$ 120 MeV and an averaged
transverse flow velocity $v_{\perp Pb}^{aver} =$ 0.43 c in central collisions
of Pb + Pb at 158 AGeV.
