  As a continuation of our previous work, which concerned the radial abundance
distribution in the galactic disc over the distances 4-10 kpc this paper
presents the first results on the metallicicty in the outer disc (RG > 10 kpc).
Based on high-resolution spectra obtained for 19 distant Cepheids we sampled
galactocentric distances from 10 to 12 kpc. Combined with the results of our
previous work on the inner and middle parts of the galactic disc, the present
data enable one to study the structure of the radial abundance distribution
over a large baseline. In particular, we find indications of a discontinuity in
the radial abundance distribution for iron as well as a number of the other
elements. The discontinuity is seen at a galactocentric distance RG = 10 kpc.
This finding supports the results reported earlier by Twarog et al. (1997).
