\begin{table}%t1
%\centering
\par
\caption{\label{tab:bricks}Galaxy content and geometry for the data bricks (sizes are in
$h^{-1}$~Mpc).}
\begin{tabular}{rrrrrr} 
\hline\hline
\noalign{\smallskip}
Sample&$N_{\mbox{gal}}$&  Depth & Width & Height & $d$\\
\noalign{\smallskip} 
\hline 
2dF&8487&133.1&254.0&31.1&5.0\\
NGP250&7588&88.6&169.1&20.7&3.4\\ 
\hline 
\end{tabular}
\tablefoot{$N_{\rm{gal}}$ is the number of galaxies in the sample,  and $d$ is the mean distance between galaxies in the sample.}
\end{table}