\begin{table}%t2
\caption{\label{tab2}Magnetic field obtained from various pulsar samples.}      
%\centering
\par
\begin{tabular}{c c c c c c}  
\hline\hline                 
sample & no. objects & $\ell_{\rm II}$ & $b_{\rm II}$ & B & $\chi^2_{\rm rid}$ \\
 & & degrees &  degrees & $\mu$G & \\
\hline                       
$<$$300$~pc & 7 & 16 & 45 & 1.9 & 470 \\
III quad & 4 & 5 & 42 & 3.3 & 40 \\
$<$$500$~pc & 18 & 6 & 28 & 2.7 & 1500 \\
III quad & 8 & 9 & 43 & 2.5 & 340 \\
0.5--2~kpc & 103 & 80 & --10 & 2.5 & 10000 \\
arm excl. & 57 & 100 & 6 & 3.1 & 2200 \\
\hline                     
\end{tabular}\vspace*{-3mm}
\end{table}