Left: Measured ratios of the principal Si XII satellite feature at 5.56 Å to the Si XIII ﹩w_{4}+y_{4}﹩ line at 5.405 Å during the four flares of Table 1, plotted against ﹩T_{e}﹩ measured from GOES. Filled circles denote line fluxes from Gaussian fits; open circles denote line fluxes from total flux above continuum level. The solid line is the calculated ratio. Right: Measured ratios plotted against ﹩T_{0}﹩ for ﹩\mathrm{DEM}\,=\mathrm{exp}\,( -T_{e}/ T_{0}) ﹩. The solid line is the calculated curve.