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We have carried out spectroscopic observations of the high redshift($z\approx 3.4$) radio galaxy 0902+34 at intermediate resolution with theWilliam Herschel Telescope. The dynamical spectral ranges covered are 4600-5480\AA and 5920-7680 \AA with resolutions of 5.4 \AA and 9.5 \AA, respectively. Wedetect a continuum that is almost flat and resolve three emission lines:Ly$\alpha$, C IV $\lambda$1549 and He II $\lambda$1640, the last one previouslyundetected. The line ratios are similar to the typical values found fornarrow-line high redshift radio galaxies. Line ratios observed in differentregions of the galaxy seem to indicate the presence of strong ionization and/ordust density gradients. We have not detected any Ly$\alpha$ absorption atz=3.3968 (red wing of the Ly$\alpha$ emission line) as might be expected fromthe absorption found at 21 cm by other authors using the VLA and Areciboantennas. We discuss possible models for the H I absorbing cloud.Comment: 14 pages; uuencode file containing 2 .ps files; figures upon reques

Intermediate-resolution spectroscopy of the radio galaxy B2 0902+34 at Z approximately equal 3.4