\begin{table}%t7?????%t6!!
%\centering
\par
\caption{
Derived abundances relative hydrogen, [X/H], where X denotes the 
different elements as indicated. Each element has three columns, mean 
abundance ([X/H]), standard deviation of the mean abundance 
($\sigma_{\rm [X/H]}$), and the number of spectra lines ($N$) that has 
been used in computing the mean abundance. The abundances have been 
normalized with respect to the solar photospheric abundances as given 
in Grevesse \& Sauval~(\cite{grevesse2}), see also 
Table~\ref{tab:solarvalues}. The second column indicates if the star 
belongs to the thin disk (${\rm mem=1}$) or the thick disk (${\rm mem}=2$) (${\rm mem=3}$
indicates the Sun). The full table is available in electronic form at the CDS via anonymous ftp to {\tt cdsarc.u-strasbg.fr (130.79.128.5)} or via {\tt http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/410/527}.}
\label{tab:abundances}
\par
%\centering
\par
\begin{tabular}{lcrrrrrrrrrrrrr}
\hline \hline
	&  mem 
	&  \multicolumn{3}{c}{\ion{Fe}{i}}  
	&  \multicolumn{3}{c}{\ion{Fe}{ii}}  
	&  \multicolumn{3}{c}{\ion{Na}{i}}  
	&  \multicolumn{3}{c}{\ion{Mg}{i}}  
	&  $\ldots$ \\
    	& 
	&  [X/H]   
	&  $\sigma_{\rm [X/H]}$ 
	&  $N_{\rm lines}$ 
	&  [X/H]   
	&  $\sigma_{\rm [X/H]}$ 
	&  $N_{\rm lines}$ 
	&  [X/H]   
	&  $\sigma_{\rm [X/H]}$ 
	&  $N_{\rm lines}$ 
	&  [X/H]   
	&  $\sigma_{\rm [X/H]}$ 
	&  $N_{\rm lines}$ 
	&  $\ldots$ \\
\noalign{\smallskip}
\hline\noalign{\smallskip}
\noalign{\smallskip}
 Sun        & 3   &   0.00  &  0.09  &  147  &  $ 0.00$  &  0.09  &   29      & 0.00     & 0.04    &   4    &   0.00  &  0.00  &  7  & $\ldots$ \\
 Hip 3086   & 2   & $-0.11$ &  0.09  &  145  &  $-0.18$  &  0.07  &   24      & $-0.10$  & 0.03    &   4    &   0.03  &  0.05  &  6  & $\ldots$ \\
 Hip 3142   & 1   & $-0.45$ &  0.09  &  131  &  $-0.45$  &  0.08  &   25      & $-0.33$  & 0.04    &   4    & $-0.27$ &  0.05  &  7  & $\ldots$ \\
 	   $\vdots$   
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\vdots$ 
	&  $\ddots$ \\
\hline
\end{tabular}
\end{table}