\begin{table}%t4
%Table 4\\
\caption{Visual spectrum of NGC~3242.\label{tab4}}
%\centerline
 {\begin{tabular}{llcccc}
\hline
\hline\\[-3mm]
\multicolumn{1}{c}{$\lambda$} & Ion & \multicolumn{3}{c}{Intensities$^{\dagger}$}& Average\\ \cline{3-5}
\multicolumn{1}{c}{(\AA)}& & (1) & (2)& (3) & Intens.\\
\hline
3426 & \ion{[Ne}{v]}  &        &  1.73  &       &  1.73 \\
3727$^{\ast}$   & \ion{[O}{ii]} & 14.4 & 6.0  & 11.2  & 12 \\
3869 & \ion{[Ne}{iii]} & 103 & 88.8 & 91  & 93 \\
4101 & \ion{H}{$\delta$}& 26.6 & 27.0 & 25.8 &     \\
4267 & \ion{C}{ii}    & 0.62   &  0.77 & 0.72  & 0.70 \\
4340 & \ion{H}{$\gamma$}& 47.4 & 46.8 & 44.6 &     \\
4363 & \ion{[O}{iii]} & 13.5 & 14.0   & 12.0  & 13.5 \\
4471 & \ion{He}{i}    & 4.12 & 3.52 & 3.56 & 3.7 \\
4686 & \ion{He}{ii}  & 25.7 & 40.5 & 23.0 & 28 \\
4711 & \ion{[Ar}{iv]} & 4.89  &  5.95 & 4.0 & 4.9 \\
4724 & \ion{[Ne}{iv]} & 0.0493   &    &     & 0.049\\
4725 & \ion{[Ne}{iv]} & 0.0407  &     &     & 0.041\\
4740 & \ion{[Ar}{iv]} & 4.52    & 5.29 & 3.58 & 4.5 \\
4861 & \ion{H}{$\beta$} & 100 & 100 & 100 & 100\\
5007 & \ion{[O}{iii]} & 1280 & 1205 & 1260 & 1260\\
5517 & \ion{[Cl}{iii]} & 0.317 & 0.26  &    &  0.30 \\
5538 & \ion{[Cl}{iii]} & 0.277 & 0.25  &      & 0.27 \\
5755 & \ion{[N}{ii]}  & 0.0634  &    & 0.065  & 0.064 \\
5876 & \ion{He}{i}    & 11.6   & 10.3 & 9.2  & 11.0 \\
6312 & \ion{[S}{iii]} & 0.631  & 0.53  & 0.53  & 0.56 \\
6563 & \ion{H}{$\alpha$}& 285  &       & 282  &      \\
6584 & \ion{[N}{ii]}  & 2.63  & 1.51  & 3.48   & 2.6 \\
6717 & \ion{[S}{ii]}  & 0.278 & 0.24  &      & 0.27 \\
6731 & \ion{[S}{ii]}  & 0.392 & 0.26  &      & 0.39 \\
7005 & \ion{[Ar}{v]}   & 0.0835    &      &  0.063 & 0.080 \\
7135 & \ion{[Ar}{iii]}& 6.99 &     & 6.92  & 6.96 \\
7263 & \ion{[Ar}{iv]}  & 0.124    &   & 0.11  & 0.19: \\
8045 & \ion{[Cl}{iv]}  &      &   & 0.41  & 0.41 \\
%9532 & \ion{[S}{iii]}  &     &    &      &  21 \\
$C$    &                 & 0.10 & 0.10  & 0.14  &  \\
\hline
\end{tabular}}
\par
\smallskip
$^{\dagger}$ References; (1) Tsamis et~al. (\cite{tsamis}); (2) Krabbe et~al.
(\cite{krab}); (3) Aller \& Czyzak (\cite{aller}).\\ 
: Indicates uncertain values.\\ 
$^{\ast}$ This is a blend of $\lambda$3726 and $\lambda$3729 lines.\\
$C$ is the extinction.
\end{table}