Ultraviolet through optical spectroscopy of four NLS1s shows strong
absorption features in the high-ionization UV resonance lines such as C IV, N
V, and Si IV. Mg II is not absorbed. The absorption could originate in the warm
absorber.Comment: Contributed talk presented at the Joint MPE,AIP,ESO workshop on
NLS1s, Bad Honnef, Dec. 1999, to appear in New Astronomy Reviews; also
available at http://wave.xray.mpe.mpg.de/conferences/nls1-worksho
