\begin{table}%t10
%\centering
\par
\caption{Abundances ($[{\rm El./H}]$) for the primary and se\-con\-da\-ry 
components of \AD. $N$ is the number of lines used per ion.}\label{tab:adboo_abund}
\small 
\begin{tabular}{lllrllr} \hline
\hline
&\multicolumn{3}{c}{Primary} & \multicolumn{3}{c}{Secondary} \\
Ion          &[El./H]&  rms&  $N$&[El./H]& rms & $N$  \\
\hline
Ca I         &$+0.22$& 0.06&  4&$+0.20$& 0.23&  3 \\   
Fe I         &$+0.08$& 0.15& 33&$+0.06$& 0.17& 14 \\  
Fe II        &$+0.09$& 0.21&  4&       &     &    \\
Ni I         &$+0.22$& 0.11&  3&$+0.16$&     &  1 \\
\hline
\end{tabular}            
\end{table}