  We report empirical determinations of atomic oscillator strengths, or
f-values, for 11 ground-state transitions of Fe II in the wavelength range 1050
to 1150 Ang. We use ultraviolet absorption line observations of interstellar
material towards stars in the Galaxy and the Magellanic Clouds taken with
Copernicus, the Goddard High Resolution Spectrograph on-board the Hubble Space
Telescope, and the Far Ultraviolet Spectroscopic Explorer. We derive absolute
oscillator strengths by a combination of the apparent optical depth, component
fitting, and curve-of-growth fitting techniques. Our derived oscillator
strengths are generally in excellent agreement with recent theoretical
calculations by Raassen & Uylings using the orthogonal operator technique.
However, we identify three of the eleven transitions studied here whose
f-values seem to be incompatible with these calculations, by as much as a
factor of two. We suggest revisions to these f-values based upon our analysis.
