  We present far-UV spectra of the three magnetic cataclysmic variables (MCVs)
BY Cam, V1309 Ori and AE Aqr obtained with the FUSE satellite. These MCVs have
revealed strongly unusual NV and CIV UV resonance lines. The FUSE spectra
exhibit broad OVI lines as well as a strong NIII line at 991A, while the CIII
1175A line is nearly absent, supporting non-solar CNO abundances of the
accreting matter in these sources. The spectrum of BY Cam shows molecular H2
lines which might be of circumstellar nature. The flaring activity of AE Aqr is
also observed in the far-UV range. The radial velocities of the broad OVI
components in AE Aqr are orbitally modulated and would indicate an emission
region close to the magnetosphere.
