\begin{table}%t7
\caption{Deconvolved source angular diameters (in arcseconds) derived from 
each tracer assuming a Gaussian source.}
\label{tab_ang}
%\centerline
{
\small
\begin{tabular}{cccccc}
\hline \hline
source    & \H (1--0) &  \H (3--2) & \CIII\ & (sub-)mm continuum &   \DCO\ \\
\hline
05345+3157 &  31.8 &  20.8 &  7.9 &  21.4  &   34.4 \\
05373+2349 &  34.9 &  21.4 &    -- &  14  &   29.6  \\
18144$-$1723 &  23.8 &  22.2 &   -- &  14.8 &  --  \\
18511+0146 &  41.3 &  29.9 &    41.3 &   29.3 &   23.6 \\
18517+0437 &  25.2 &  18.3 &    28.7 &   29.0$^{*}$  &   -- \\
19092+0841  &  --  &  15.1  &   17.6  &  11.7  &  -- \\
20126+4104 &  32.0 &  22.7 &    24.7  &  18.0$^{*}$  &   --  \\
20216+4107 &  23.6 &  14.9 &    14.1  & 22.7$^{*}$   &   --   \\
20343+4129 &   -- & 21.8 &  32.5  & 26.0$^{*}$ &  -- \\
22172+5549 &  18.1 &  -- &    24.0 &  15.7 &   --    \\
\hline
\end{tabular}
}
$^{*}$  From 1.2~mm continuum (Beuther et~al.~\cite{beuther}). They
are the geometric mean of the major and minor axes obtained from 
two-dimensional Gaussian fits to the observed emission.\\
\vcvs , \vds\ and \vtqt\ have also been observed at 850 $\mu$m by
Williams et~al.~(\cite{williams}) but they do not estimate the diameters. \\
\end{table}