\begin{table}%T1
\par
\caption{\label{telescopes}List of telescopes. 
Column~1: number of published  21-cm line widths;
Col.~2: code number of the telescope in LEDA; 
Col.~3:~Name of the telescope.}
%\centering
\par
\begin{tabular}{rrl}
\hline\hline
$n$& code   &Radiotelescope    \\
\hline
 19~291& 9&Arecibo    \\
 10~089& 1&Nan\c{c}ay    \\
  8702& 7&NRAO (91 m)    \\
  3209&10&Parkes    \\
  2476& 8&Effelsberg    \\
  1245& 3&NRAO (43 m)    \\
  1062& 5&Jodrell B. (MarkI)    \\
   816& 2&Westerbork    \\
   244&14&Jodrell B. (MarkII)    \\
   114&11&Owens Valley    \\
   451&15&VLA    \\
    86& 6&Harvard    \\
    54&12&Dwingeloo    \\
    38& 4&Cambridge\\
    37&13&IAR (Argentina)    \\
  3199&  &Optical \\
\hline
 51~113&  &total \\
\hline
\end{tabular}
\end{table}