\begin{table}%t2
\caption{\label{tab2}Solar abundances derived from our analysis for five elements.} 
%\centerline
 {\small \begin{tabular} {ccc}
\hline \hline
Element & $\log$~$n$(X) & $\log$~$n$(X)$_{\rm AG89}$$^*$\\
\hline
Na~{\sc i} & $6.33 \pm 0.02$ & 6.33\\
Si~{\sc i} & $7.56 \pm 0.01$ & 7.55\\
Ca~{\sc i} & $6.35 \pm 0.02$ & 6.36\\
Ti~{\sc i} & $4.97 \pm 0.01$ & 4.99\\
Ti~{\sc ii}& $4.92 \pm 0.10$ & 4.99\\
Ni~{\sc i} & $6.26 \pm 0.02$ & 6.25\\
\hline
\end{tabular}}
\medskip
$^{\rm *}$ Standard values by Anders \& Grevesse (\cite{ande89}).
\end{table}