Electron pressure versus optical depth for models with T_eff from 2500 K (upper curves) to 500 K (lower curve), computed from log(τ_ross) = +2.5 to –5.0. For the warmer of the models are shown both the results based on including only the original 22 molecular opacities in the equilibrium computation as well as the full set of the 50 molecules, as discussed in the text. For the coolest models only those with opacities from all the 50 molecular opacities adopted in the MSG models could converge.