\begin{table}%t7
%\centering
\par
\caption{Summary of ISOCAM observations and results at 15~$\mu$m for five clusters of galaxies.  The data was
obtained from Metcalfe et~al. (\cite{2003AetA...407..791M}) for Abell~370, Abell~2218 and Abell~2390, Fadda et~al. (\cite{2000AetA...361..827F}) and Duc et~al. (\cite{2002AetA...382...60D}) for Abell~1689, and this paper for
Cl~0024+1654.  The content of the columns in the table are as follows: name and redshift of the cluster, total
area scanned, sensitivity reported at the~$5\sigma$ level, flux of the weakest reported source 
in~$\mu$Jy, total
observation time, total number of sources detected including sources without redshifts and stars. Then number of
cluster galaxies, virial radius, virial mass, number of sources with 
 ${L_{\rm IR}>9\times10^{10}~L_{\odot}}$
detected and expected. The expected number of sources was obtained by comparison with Cl~0024+1654 as described
in the text. Virial radii and masses are from Girardi \& Mezzetti (\cite{2001ApJ...548...79G}) and King et~al.
(\cite{2002AetA...383..118K}). \label{comp}}
      \begin{tabular}{cccccccccccc}
\hline
         \hline
\noalign{\smallskip}
Cluster& $z$    & Area        & Sensitivity& Faintest source&Obs. $t$. & Tot. $n$.    & Cluster & ${R}_{\rm vir}$&${M}_{\rm vir}$& \multicolumn{2}{c}{$N_{\rm comp}$} \\
       &      &$(\arcmin^2)$&(5$\sigma$) &($\mu$Jy)       & (s)  & sources    & galaxies&  (${ h}^{-1}$ Mpc)                & (${h}^{-1}$ $10^{14}$ ${M}_\odot$)         & Detected&Expected\\
\hline \noalign{\smallskip}
Cl~0024 & 0.39 & 37.8        &   140      &  141           & 22615  & 35       & 13 & 0.94 &6.42 &10&  --\\
\noalign{\smallskip}
A~370   & 0.37 & 40.5        &  350       &  208           & 22688  & 20       & 1  & 0.91 &5.53 &1&8 \\%D = 1981.7
\noalign{\smallskip}
A~1689  & 0.18 & 36.0        & 450        & 320            & 9500   & 18       & 11 & 1.1  &5.7  &0&1   \\
\noalign{\smallskip}
A~2390  & 0.23 & 7.0         & 100        & 54             & 29300  & 28       & 4  & 1.62 &20.35&0& 1\\
\noalign{\smallskip}
A~2218  & 0.18 & 20.5        &  125       & 90             & 22000  & 46       & 6  & 1.63 & 18.27 & 0 &1 \\
\hline
      \end{tabular}
\end{table}