  I review the results of recent analysis and interpretation of X-ray
observations of elliptical galaxies, focusing on elemental abundances and dark
matter. The hot ISM is characterized by subsolar Fe abundances and solar
Si-to-Fe ratios; and, I compare these with stellar abundances and discuss
implications of these measurements. From models constructed to explain X-ray
temperatures and their correlation with optical properties in a complete sample
of ellipticals, I demonstrate the ubiquity of dark matter in bright elliptical
galaxies, present limits on dark matter structural parameters, and discuss the
scaling of dark halos with optical luminosity. The visual mass-to-light ratio
within six optical effective radii has a universal value of 25 (for a Hubble
constant of 80 km/sec/Mpc) that conflicts with the simplest extension of CDM
theories of large scale structure formation to galactic scales.
