\begin{table}%t2
\caption{Element abundances in the SDSS galaxies$^1$ \label{tab2}}
\begin{tabular}{lccccccc} \hline\hline
Spectrum number    &$t_{\rm e}$(O {\sc iii})&12~+ log 
O/H&log N/O&log Ne/O&log S/O&log Ar/O&log Fe/O \\
\hline
0266-51630-100& 1.5533 $\pm$ 0.0327&7.84 $\pm$ 0.02& --1.62 $\pm$ 0.03& --0.85 $\pm$ 0.04& --1.68 $\pm$ 0.04& --2.40 $\pm$ 0.04& --1.93 $\pm$ 0.14 \\
0267-51608-384& 1.2055 $\pm$ 0.0600&7.99 $\pm$ 0.05& --1.30 $\pm$ 0.07& --0.55 $\pm$ 0.10& --1.71 $\pm$ 0.11& --2.43 $\pm$ 0.07& --1.69 $\pm$ 0.21  \\
0270-51909-306& 0.9444 $\pm$ 0.1699&8.33 $\pm$ 0.20& --1.09 $\pm$ 0.26& --0.77 $\pm$ 0.41& --1.67 $\pm$ 0.33&     ...      &     ...       \\
0272-51941-365& 1.0133 $\pm$ 0.1661&8.38 $\pm$ 0.18& --1.40 $\pm$ 0.23& --0.65 $\pm$ 0.36& --1.60 $\pm$ 0.29& --2.50 $\pm$ 0.22& --2.32 $\pm$ 0.80 \\
0275-51910-429& 1.5117 $\pm$ 0.0513&7.82 $\pm$ 0.03& --1.45 $\pm$ 0.05& --0.72 $\pm$ 0.06& --1.73 $\pm$ 0.10& --2.37 $\pm$ 0.05&     ... \\ 
\hline
%0269-356& 7.97$\pm$0.10& --1.07$\pm$0.13& --0.85$\pm$0.23& --1.50$\pm$0.18& --2.19$\pm$0.12&    ...         & --1.69$\pm$0.19& --1.71$\pm$0.18 \\
%0270-306& 8.37$\pm$0.08& --1.12$\pm$0.08& --0.82$\pm$0.14& --1.72$\pm$0.21&    ...         &    ...         &    ...         & --1.90$\pm$0.17 \\ \hline
\end{tabular}\medskip
\par
$^1$ Only the first five galaxies are shown. The total list of galaxies
is available in electronic form at the CDS. The Cl/O abundance ratios are not shown here 
for lack of space, but they are present in the electronic table.
\end{table}