\begin{table}%t6
\caption{Reddening, total-to-selective extinction, visual extinction, 
atomic column density ratios, and gas-to-dust ratios for sightlines in the SMC.
A~higher \ion{Na}{i}/\ion{Ca}{ii}~ratio implies less \ion{Ca}{ii} liberated 
from dust grains by destructive processes and thus a~more quiescent environment. 
A~lower ratio thus indicates a~more turbulent medium where dust grains are destroyed
and \ion{Ca}{ii} is released into the gas phase.
The Ti~depletion level~$\delta_{\rm Ti}$ gives a~measure of the lock up of the refractory ion in grains. A~higher \ion{Ti}{ii}/\ion{Ca}{ii}~ratio indicates a~stronger/harder UV~field.  
\Ebv\ is corrected for foreground reddening. $R_{\rm V}$ for \object{AzV~65} and \object{Sk~191} from Table~\ref{tb:Rv}, other values for~$R_{\rm V}$ (and~$A_{\rm V}$) from
\citet{2003ApJ...594..279G}.}
\label{tb:dust}
\small%\centerline
{
\begin{tabular}{lllllll}\hline\hline
ID				& \mbox{\object{AzV 456}} & \mbox{\object{AzV 18}} & \object{AzV 214} & \object{AzV 398} & \object{AzV 65} &\object{Sk 191}   \\\hline
$E_{B-V}$ (mag) [1]		& 0.30 $\pm$ 0.03    &  0.17 $\pm$ 0.01  & 0.16 $\pm$ 0.01    & 0.23 $\pm$ 0.02    &       	     &   	         \\
$E_{B-V}$ (mag) [Sect.4.2]	& 0.27 $\pm$ 0.07    &  0.17 $\pm$ 0.03  & 0.16 $\pm$ 0.05    & 0.29 $\pm$ 0.04	   &  0.08 $\pm$ 0.04  & 0.06 $\pm$ 0.05     \\
$R_{\rm V}$	[1]			& 2.05 $\pm$ 0.17    &  3.30 $\pm$ 0.38  & 2.40 $\pm$ 0.30    & 3.14 $\pm$ 0.34    & 		     &  	         \\
$R_{\rm V}$	[2]			& 2.19 $\pm$ 0.23    &  2.90 $\pm$ 0.42  & 		        & 		   &  $\sim$2.8     &  $\sim$2.7       \\
$A_{\rm V}$	[1]			& 0.54 $\pm$ 0.06    &  0.55 $\pm$ 0.08  & 0.35 $\pm$ 0.05    & 0.68 $\pm$ 0.11    &  $\sim$0.22    &  $\sim$0.16      \\
$A_{\rm V}$	[2]			& 0.57 $\pm$ 0.08    &  0.49 $\pm$ 0.11  & 			& 		   & 		     &  	         \\
\hline
\\
$N$(\ion{H}{i})/$A_{\rm V}$ ($\times$10$^{21}$) [1]
				& 7.40 $\pm$ 1.20	   & 15.45 $\pm$ 2.33  & 7.08 $\pm$ 1.77    & 11.69 $\pm$ 3.43   & --	     & --	         \\
$N$(\ion{H}{i})/$A_{\rm V}$ ($\times$10$^{21}$) [3]
				& 7.94		   & 22.73 	     & 18.60 		& 10.53 	   &  46	     & 15.7 	         \\
\ion{Na}{i}/\ion{Ca}{ii}	& 1.8 / 7.1 (uv)   &  0.60 	     &	0.95 		& 1.0 		   &  0.17	     &  $>$1.15	         \\
\ion{Ti}{ii}/\ion{Ca}{ii}	& 0.45 		   &  1.02 	     &	0.98 		& 0.78 		   &  0.98	     &  0.85	         \\	
log~$N$(Ti)/$N$(H)			& --9.4		   & --9.0	     & --8.5		& --8.7		   & --8.8	     & --9.4		 \\
log~$\delta_{\rm Ti}$ [4]	& --2.5		   & --2.1	     & --1.6		& --1.8	  	   & --1.9	     & --2.5		 \\
\hline
\end{tabular}}
\medskip
 [1] \citet{2003ApJ...594..279G};
[2] \citet{2005ApJ...630..355C};
[3] \ion{H}{i} ATCA+PARKES survey (\citealt{2004ApJ...604..176S,2000MNRAS.315..791S,1999MNRAS.302..417S};
\citealt{1997MNRAS.289..225S}, see Sect.~\ref{sec:atomic};
[4] log~(Ti/H)$_{\odot}$~= $-$6.9 (\citealt{2005ASPC..336...25A}). log~$\delta_{\rm Ti}$~= log~[$N$(Ti)/$N$(H)]~$-$ log~(Ti/H)$_{\odot}$.
\end{table}