\begin{table}%t4
\caption{Model "predictions'' for \IZ~NW: model intensities divided by observed intensities.}\label{tab_compa}
\small%%\centerline
\par
 {
\begin{tabular}{l|c|c|cccc}
\hline\hline
 Line ident.           & Obs. &  N0$-$N1  &  M1  &  M2  &  M3  &  M4  \\
                       &  2   &  3 $-$ 4  &  5   &  6   &  7   &  8   \\
\cline{1-7}
 $Q_{\rm abs}$/$Q$$^a$ & 0.37 & .20$-$.43 & 0.20 & 0.34 & 0.38 & 0.43 \\
\cline{1-7}
 {\civ}\ 1549          & 500: & .14$-$.41 & 1.12 & 0.65 & 0.64 & 1.08 \\
 {\oi}$\:$6300+        &  8.5 & .01$-$.59 & 1.19 & 1.01 & 0.95 & 1.38 \\
 {\oii}$\:$7320+      & 6.3: & 1.5$-$1.24 & 1.19 & 1.18 & 1.19 & 1.15 \\
 {\oiii}$\:$4363       & 65.9 & .73$-$.82 & 0.96 & 0.96 & 1.00 & 0.94 \\
 {\oiv}$\:$25.9$\mu$   & 49.1 & .37$-$.84 & 1.08 & 0.97 & 0.94 & 0.98 \\
 {\neii}$\:$12.8$\mu$  & 9.0: & .14$-$.10 & 0.14 & 0.21 & 0.22 & 0.23 \\
 {\neiii}15.5$\mu$   & 45.7 & 1.31$-$1.22 & 1.09 & 1.07 & 1.02 & 1.11 \\
 {\sid}$\:$34.8$\mu$   & 157. & .03$-$.10 & 0.17 & 0.14 & 0.14 & 0.18 \\
 {\sit}$\:$1882+      & 270: & .85$-$.99 & 1.12 & 1.26 & 1.34 & 1.16 \\
 {\sii}$\:$6716        & 22.5 & .30$-$.54 & 0.96 & 0.78 & 0.77 & 1.10 \\
 {\sii}$\:$6731        & 16.9 & .30$-$.51 & 0.96 & 0.78 & 0.77 & 1.10 \\
 {\sii}$\:$4068$^b$ & 3.7$^b$ & .30$-$.43 & 0.73 & 0.58 & 0.58 & 0.80 \\
 {\siii}$\:$9531+    & 114. & 1.15$-$1.05 & 0.95 & 0.99 & 1.00 & 0.92 \\
 {\siii}$\:$6312       &  6.7 & .89$-$.84 & 0.77 & 0.85 & 0.87 & 0.75 \\
 {\siii}$\:$18.7$\mu$ & 28. & 1.15$-$1.01 & 0.94 & 0.95 & 0.94 & 0.91 \\
 {\siii}$\:$33.5$\mu$  & 120. & .45$-$.44 & 0.39 & 0.40 & 0.40 & 0.39 \\
 {\siv}$\:$10.5$\mu$   & 48. & .87$-$1.50 & 2.15 & 1.93 & 1.97 & 2.15 \\
 {\ariv}$\:$4740       &  4.5 & .26$-$.73 & 1.87 & 1.39 & 1.47 & 1.76 \\
 {\feii}$\:$26.0$\mu$  &  34. & .00$-$.05 & 0.10 & 0.10 & 0.10 & 0.14 \\
 {\feiii}$\:$4986      & 7.4 & .78$-$1.15 & 0.90 & 0.94 & 0.89 & 0.89 \\
 {\feiv}$\:$4906       & 3.0: & .54$-$.70 & 0.96 & 1.02 & 1.09 & 1.02 \\
 {\fev}$\:$4227        & 1.8: & .84$-$2.3 &  2.1 &  3.1 &  3.2 &  3.1 \\
\hline
\end{tabular}}
\medskip
$^a$ $Q_{\rm abs}$/$Q$: absolute values.\\
$^b$ \la4068 intensity not corrected for \fev\la4071 (Table~\ref{tab_res}). 
\end{table}