\begin{table}%t6
\par
\caption{\label{bt}Depolarisation parameters. }
%\centerline
{
\begin{tabular}{llrrrrr}
\hline\hline
&Name  &~$\sigma_{\rm obs}$ &~$\sigma_{\rm sf}$&~$s_0/b$ &~$m_0(\%)$ & Notes \\
\hline
&\object{0003+387}       &   250     &  1525     &    [1]    & 2.4 &   \\
$\dag$&\object{0034+444} &    75     &  1080     &    [1]    & 3.2 &   \\
&\object{0039+412}       &    20     &   [85]    &    [1]    & 5.2 &   \\
&\object{0049+379}       &   296     &  2160     &   [0.5]   & 9.0 &   \\
$\dag$&\object{0110+401} &     9     &    55     &    [1]    & 5.1 & 3 \\
&\object{0120+405}       &  (140)    &   470     &           & 5.2 & 1 \\
$\dag$&\object{0123+402} &   100     &  [420]    &   [1]     & 4.7 &   \\
&\object{0137+401}       &~$(\le$$12)$&~$\le$80  &           & 1.6 & 1 \\
&\object{0144+432}       &    19     &   100     &    [1]    & 3.2 &   \\
&\object{0213+412}       &    60     &   140     &    1.0    & 3.1 & 4 \\
&\object{0222+422A}      &   225     &  4560     &    1.5    & 3.6 &   \\
&\object{0228+409A}      &  (200)    &  [840]    &           & 3.5 & 2 \\
&\object{0254+406}       &    10     &    50     &    [1]    & 1.7 &   \\
&\object{0744+464}       &  (200)    &  3080     &           & 4.7 & 1 \\
$\dag$&\object{0748+413}B&   215     &  [900]    & 1.1       &17.2 &   \\
$\dag$&\object{0754+396} &    11     &   110     &  [1]      &11.5 & 3 \\
$\dag$&\object{0800+472} &  (100)    &  [420]    &           & 2.4 & 2 \\
&\object{0805+406}       &    11.5   &   [50]    &  [1]      & 6.7 & 4 \\
$\dag$&\object{0809+404} &   250     &   600     &  0.9      & 4.4 & 4 \\
&\object{0930+389}       & ($\le$$18$)&~$\le$210 &           & 2.9 & 1 \\
&\object{0951+422}       &  (180)    &  1395     &           & 3.9 & 2 \\
&\object{0955+390}       &    12     &   [50]    &  [1]      & 6.6 & 4 \\
&\object{1025+390B}      &    ??     &           &       &$\sim$2 & 2 \\
$\dag$&\object{1039+424} &    14     &   [60]    &  [1]      & 7.2 &   \\
$\dag$&\object{1044+454} &  (190)    &  4940     &           & 8.3 & 1 \\
$\dag$&\object{1055+404A}&    11     &   [45]    &  [1]      & 5.8 &   \\
&\object{1201+394}       &    44     &    90     &  [1]      & 3.0 &   \\
&\object{1204+401}       &    30     &   280     &[$\le$$0.1$]& 4.9 &   \\
&\object{1216+412}       &  (200)    &   620     &           & 3.8 & 2 \\
&\object{1220+408}       &    80     &  [500]    &  0.4      & 7.5 & 4 \\
&\object{1233+418}       &   140     &   220     &  0.7      & 4.2 &   \\
$\dag$&\object{1343+386} &   150     &  1210     &  1.7      & 3.0 & 5 \\
&\object{1350+432}       &  (150)    &  1490     &           & 9.7 & 2 \\
&\object{1458+433}       &$\approx$$0$&$\approx$$0$&  [1]      & 2.3 &   \\
&\object{2304+377}       &   270     &   530     &  1.2      & 3.2 & 3 \\
&\object{2311+469}       &    13     &    40     &  [1]      & 5.5 &   \\
&\object{2322+403}       &   195     &  [820]    &[$\le$$0.2$]& 6.5 &   \\  
&\object{2348+450}       &   300     &  1175     &  [1]      & 2.4 &   \\
\hline
\end{tabular}}
\smallskip
Faraday dispersions ($\sigma_{\rm obs}$ and~$\sigma_{\rm sf}$) are 
in~rad~m$^{-2}$. Values in [~~] for~$s_0/b$~mark sources equally well fitted by Burn {\it and} Tribble \mbox{models}. 
\par
Notes:
\par
 1 = too a high ~$RM$ to allow a reliable correction of 
$m_{\rm  v}^{1.4}$;  
\par
2  = no acceptable model; 
\par
3 = bad fit with the 2.7~GHz data;
\par
4 = fair agreement with the 2.7~GHz data; 
\par
5 = change of model (see text).
\end{table}