\begin{table}%t10
\caption{Estimates of the diffuse dust content in the Tau($V$) scale defined by 
models in Witt et~al. (\cite{Witt92}, Wal92), using the correlations
$\Delta_{VK}-\Delta_{UB}$, $\Delta_{VJ}-\Delta_{UB}$, 
$\Delta_{VK}-\Delta_{BV}$, and $\Delta_{VJ}-\Delta_{BV}$ (see Sect.~4.2). 
Doubtfull cases are noted with a colon. 
\label{tab10}
}
%\centerline
{\begin{tabular}{lllll}
\hline\hline
NGC  &$n$&$\tau_V$&$\sigma$&Notes \\
\hline     
1052 & 3 & 0.7 & 0.5& --    \\
1404 & 3 & 0.6:& 0.5& --    \\
1537 & 1 & 2.0:& 0.7& noUB \\
1549 & 3 & 1.3 & 0.3& --    \\
2768 & 3 & 1.0 & 0.6& --    \\
2974 & 3 & 2.1 & 0.4& --    \\
2986 & 3 & 1.8:& 0.6& smBV \\
3377 & 3 & 2.9 & 0.5& --    \\
3608 & 3 & 1.8:& 0.8& --    \\
4125 & 3 & 2.9 & 0.7& --    \\
4261 & 3 & 1.2 & 0.3& --    \\
4278 & 3 & 1.8 & 0.4& --    \\
4365 & 3 & 1.2 & 0.7& --   \\
4589 & 1 & 2.3: &  --& noUB \\
4660 & 1 & $>$$4.:$ & --& noUB, smBV \\
\hline
\end{tabular}}
\par
\smallskip
(1): NGC; (2) $n$ number of usable correlations. This is generally 3 but may be 
reduced to 1 in a few cases; (3) $\tau_V$: Tau($V$) parameter; 
(4) $\sigma$: standard deviation; (5) notes. 
Notes: noUB no $U-B$ data; smBV $\Delta_{BV}$ too small for assumed  $\tau_V$. 
\end{table}