\begin{table}%t2
\caption{Visual spectrum of NGC~40 (unreddened intensity in units of 10$^{-12}$ erg~cm$^{-2}$~s$^{-1}$).}\label{t2}
%\centerline
{\begin{tabular}{llcccc}
\hline
\hline
\multicolumn{1}{c}{$\lambda$} & Ion & \multicolumn{3}{c}{Intensities}& Unred.\\ \cline{3-5}
\multicolumn{1}{c}{(\AA)}& & (1) & (2)& (3) & intens.\\
\hline
3727 & \ion{[O}{ii]} & 264 & 264 & 253  & 657 \\
3869 & \ion{[Ne}{iii]} & 0.25 &  &   & 0.59 \\
4068 & \ion{[S}{ii]}  &  & 3.0 & 2.3 & 6.8 \\
4076 & \ion{[S}{ii]}  &  & 0.91 & 0.8 & 2.1 \\
4102 & H$\delta$& 19 & 19 & 23 & 42.4 \\
4267 & \ion{C}{ii}    & 0.35 &  &   & 0.72\\
4340 & H$\gamma$& 39 &  & 43 & 81.0\\
4363 & \ion{[O}{iii]} & 0.13: &   &   & 0.27:\\
4471 & \ion{He}{i}    & 1.9  & 2.1 & 3.2 & 4.2\\
4861 & H$\beta$ & 100 & 100 & 100 & 173\\
5007 & \ion{[O}{iii]} & 19 & 12 & 29 & 43\\
5518 & \ion{[Cl}{ii]} & 0.25: & 0.26  &   &  0.35:\\
5538 & \ion{[Cl}{ii]} & 0.35:  & 0.26  &   & 0.47:\\
5755 & \ion{[N}{ii]}  & 2.7  & 3.1 &   & 3.7\\
5876 & \ion{He}{i}    & 9.0   & 9.1 &   & 11.3\\
6312 & \ion{[S}{iii]} & 0.74  & 0.72  &   & 0.86\\
6563 & H$\alpha$& 480  & 500  &   & 520\\
6584 & \ion{[N}{ii]}  & 450  & 460  &   & 490\\
6717 & \ion{[S}{ii]}  & 15.4 & 18  &   &  18\\
6731 & \ion{[S}{ii]}  & 23.2 & 22.5  &   & 25\\
7136 & \ion{[Ar}{iii]}&  6.9 &  8.9 &   & 8.0\\
7320 & \ion{[O}{ii]}  & 11.5 &   &   & 11.4\\
7330 & \ion{[O}{ii]}  & 9.7 &   &   & 9.4\\
9531 & \ion{[S}{iii]} &    &    &    & 227$^{*}$\\
\hline
\end{tabular}}
(1) Clegg et~al. (\cite{clegg}), (2) Aller \& Czyzak (\cite{aller1}), (3) Aller et~al. (\cite{aller2}).\\ 
The (:) indicates uncertain values.\\ 
$^{*}$ The \ion{[S}{iii]} $\lambda$9531\AA~intensity was taken from Hippelein \& Munch (\cite{hippelein}). 
\end{table}