\begin{table}%t5
%\centering
\par
\caption{Mean abundance analysis from cluster members. In
  parenthesis  below the element the number of lines used is indicated.\label{tab5}}
\begin{tabular}{cccccccccccc}
\hline\hline
\multicolumn{1}{c} {Cluster} &
\multicolumn{1}{c} {[Fe/H]} &
\multicolumn{1}{c} {[Mg/H]}&
\multicolumn{1}{c} {[Si/H]}  &
\multicolumn{1}{c} {[Ca/H]} &
\multicolumn{1}{c} {[Ti/H]} &
\multicolumn{1}{c} {[Mg/Fe]} &
\multicolumn{1}{c} {[Si/Fe]} &
\multicolumn{1}{c} {[Ca/Fe]} &
\multicolumn{1}{c} {[Ti/Fe]} &
\multicolumn{1}{c} {$[\alpha/\rm Fe]$}\\
\hline
 & (150) & (3) & (13) & (16) & (33) & &&&&\\
\hline
Berkeley~75& $-0.22\pm0.20$ & $+0.16\pm0.06$ & $-0.42\pm0.14$ & $-0.24\pm0.07$& $-0.06\pm0.04$& $+0.38\pm0.09$ & $-0.20\pm0.17$&$-0.02\pm0.10 $&$+0.16\pm0.07$&+0.08\\
Berkeley~25& $-0.20\pm0.05$ &  $0.00\pm0.29$ & 
$-0.12\pm 0.17$ & $-0.30\pm0.10$& $-0.07\pm0.13$& 
$+0.11\pm 0.31$ & $-0.01\pm0.19$&$-0.19\pm0.12$ &$+0.04\pm0.15$&--0.01\\
Ruprecht~7 & $-0.26\pm0.05$ & $-0.35\pm0.09$ &  $-0.20\pm0.05$ & --$0.22\pm0.11$& $-0.37\pm0.09$& $-0.10\pm0.10$ & $+0.05\pm0.06$&$+0.03\pm0.12$ &$-0.12\pm0.10$&--0.04\\
Ruprecht~4 & 
$-0.09\pm0.05$ & $-0.09\pm0.04$ &  $-0.05\pm0.04$ & $-0.05\pm0.05$& $-0.06\pm0.05$& 
$+0.01\pm0.05$ & $+0.05\pm0.05$&
$+0.05\pm0.06$ &$+0.04\pm0.06$&+0.04\\
Berkeley~73& $-0.22\pm 0.10$ & 
$-0.12\pm 0.10$ &  $-0.05\pm0.04$ & $-0.30\pm0.07$& $-0.17\pm0.07$& $+0.10\pm0.15$ & $+0.17\pm 0.09$&
$-0.08\pm0.19$ &$+0.05\pm0.12$&+0.06\\
\hline
\end{tabular}
\end{table}