Figure to replace Fig. 8 in Moehler et al. (1995, M15) The resulting masses for the stars inM15, plotted against T_eff. The solid line represents a ZAHB model taken from Dorman et al. (1991) for [Fe/H] = −2.26 (Y_MS = 0.246, and [O/Fe] = 0.75). The short dashed line represents an extension of the ZAHB towards higher temperatures taken from Sweigart (1987) for Y_MS0.20 and ZMS = 10⁴. a) T_eff only from low resolution spectra b) parameters only from Balmer lines (the masses for B 348 (1.45 M_⊙) and B 440 (3.08 M_⊙) are left out, because they would corrupt the comparability of the plots) c) parameters from combination of continuum (resp. Q index) and Balmer lines. The marked stars are B 208, B 325, and B 276, for which the masses should be treated with great caution (see text [original paper]).