\begin{table}%t3      
%\centering
\par
\caption{Summary of the physical properties of the gas clouds estimated from  the 99\% contour plot in Fig.~\ref{fig:contours}.}\label{cloudy}   
\begin{tabular}{c c c c c }
\hline\hline                
$\log~U$ & $n_{\rm e}$ range & $n_{\rm H}$ range &  {\it dist range} &  {\it size range}  \\     
-- & cm$^{-3}$ &   cm$^{-2}$ &     cm         &         cm      \\
\hline\noalign{\smallskip}
0.4  &  10$^{9.8-11.1}$  &  10$^{19.9-21.9}$     &   $1.95\times10^{16-17}$  &   10$^{8-12}$    \\
0.8  &  10$^{9.5-11}$  &  10$^{20.3-22}$     &   $1.95\times10^{16-17}$  &   10$^{9-13}$      \\
  \hline
\end{tabular}
\end{table}