\begin{table}%f6 non: %t6!!
\caption{IUE spectrum of NGC~6153.}\label{t6}
%\centerline
{\begin{tabular}{llccccc}
\hline
\hline
\multicolumn{1}{c}{$\lambda$} & Ion & \multicolumn{2}{c}{Intensities}& &{Ratio}\\ \cline{3-4}
\multicolumn{1}{c}{(\AA)}& & (1) & (2) & & (3)  \\
\hline
1240 & \ion{N}{v}    & 1.6 & 23.0 & & 0.30 \\
1248 & \ion{C}{iii}  & 1.2 & 17.0 & & 0.22 \\ 
1293 & \ion{O}{vi}   & 2.3 & 23.0 & & 0.30 \\
1334 & \ion{C}{ii}   & 1.7 & 13.0 & & 0.17 \\
1344 & \ion{C}{iv}   & 2.0 & 15.0 & & 0.20 \\
1371 & \ion{O}{vi}$^{*}$   & 1.7 & 10.0 & & 0.14 \\
1401 & \ion{Si}{iv}  & 1.7 & 9.4 & & 0.12 \\
1410 & \ion{Si}{ii}  & 2.2 & 12.0 & & 0.16 \\
1425 & \ion{O}{vi}   & 1.5 & 8.2 & & 0.11 \\
1486 & \ion{N}{iv}   & $\leq$1.0 & $\leq$4.4 & & $\leq$0.057 \\
1550 & \ion{C}{iv}$^{*}$ & abs &  & & \\
1640 & \ion{He}{ii}  & 16.9 & 67.6 & & 0.88 \\
1663 & \ion{O}{iii]} & $\leq$0.3   &$\leq$1.1  & & $\leq$0.014 \\
1750 & \ion{N}{iii]} & 3.7 & 12.3 & & 0.16 \\
1762 & \ion{C}{ii}   & $\leq$0.3 & $\leq$1.1  & & $\leq$0.014 \\
1776 & \ion{Fe}{ii}  & 1.2 & 4.0 & & 0.052 \\
1883 & \ion{Si}{iii]}& 0.4: & 1.5: & & 0.020: \\
1892 & \ion{Si}{iii]}& 0.5: & 1.9: & & 0.027: \\
1909 & \ion{C}{iii]} & 7.7 & 30.8 & & 0.401  \\
2070 & \ion{O}{vi}   & 10.3 & 93.7 & & 1.31 \\
2424 & \ion{[Ne}{iv]}  & 1.8 & 6.07 & & 0.085 \\
2733 & \ion{He}{ii} & 1.2 & 1.25 & & 0.018 \\
2836 & \ion{O}{iii}   & 5.5 & 4.68 & & 0.065 \\
3047 & \ion{O}{iii}  & 5.3  & 3.29 & & 0.046 \\
3132 & \ion{O}{iii} & 39.8 & 21.9 & & 0.306 \\
3170 & \ion{C}{ii}? & 10.9 & 5.8 & & 0.081 \\
3186 & \ion{Si}{ii} & 3.9 & 2.05 & & 0.029 \\
3203 & \ion{He}{ii} & 6.4 & 3.23 & & 0.045 \\
\hline 
\end{tabular}}
(1) $I$(line) measured -- all intensity units 10$^{-14}$ erg cm$^{-2}$ s$^{-1}$;\\
(2) $I$(line) extinction corrected -- all intensity units 10$^{-12}$ erg cm$^{-2}$ s$^{-1}$;\\
(3) $I$(line)/I(H$\beta$) after correction for diaphragm size and extinction.\\
$^{*}$ These stellar lines show P Cygni profiles. The \ion{O}{v} absorption has an equivalent width of 4.5~\AA~and the \ion{C}{iv} of 0.82~\AA.
\end{table}