\begin{table} %t8
\caption{A comparison of the properties the hidden sources (h.s.) in four systems.
Column 3 lists the total 15~$\mu$m emission from the host galaxy in each case.}\label{t8} 
%\centerline
{\begin{tabular}{lcccccc}
\hline \hline
\noalign{\smallskip}
  Source   &  7~$\mu$m & 15~$\mu$m  & 15~$\mu$m  &  $D$   &  $R1$  &  $R2$ \\
           &    mJy     &    mJy      &    mJy      & Mpc  &      &     \\
           &   (h.s.)   &   (h.s.)    &   (host)    &      &      &     \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
Mkn~297   &   42.5     &  66.5       &    289      & 66   &  --   & 0.23\\
Antennae   &   19.1     &  49.7       &    261.7    & 20.0 & 14.6 & 0.19\\
Stepn's Q. &    --       &  11.9       &    114.9    & 80   &  3.8 & 0.10\\
Arp 299    &   325      &  1860       &    7027     & 41   & 0.09 & 0.26\\
 \hline
\end{tabular} }
\medskip 
\par
 {$R1$ = Ratio of 15~$\mu$m (LW3) emission from the hidden }     \\
{source in Mkn~297 to the hidden source in the other galaxy } \\ 
{(corrected for distance to Mkn~297).}                        \\ 
{$R2$ = Ratio of 15~$\mu$m emission from each hidden source }   \\ 
{to the total 15~$\mu$m emission for its host galaxy. }
\end{table}