Left: Spectroscopic metallicity (on the scale of Carretta & Gratton 1997) vs. radial velocity. Right: Same metallicities within 40 kpc as a function of radial distance. The dwarf contamination clearly stands out as a clump around −2 dex above −150 km s−1. The top (bottom) panels each display the data set before (after) removal of this contamination. Shaded regions indicate the HST fields of Brown et al. (2003, 2006, 2007). For distributions of all metallicities out to 160 kpc, see Fig. 15 (bottom). A solid line in the right panel has been added at ﹩[ \mathrm{Fe}\,/ \mathrm{H}\,] _{\mathrm{CaT}\,}=-1﹩ for reference.