\begin{table}%t3
\caption{Mass flux in the jet and filling factors.}\label{tab3}
%\centerline
{
    \begin{tabular}{cccccccc}
      \hline \hline
knot & $v_{\rm tan}$$^{a}$ & $r_{{\rm jet}}$$^{b}$ & $\dot{M}$($n_{\rm H},r_{\rm j},v_{\rm j}$)$^{c}$ 
&$\dot{M}$(\s)$^{d}$ & $ff$(\s)$^{e}$ & $\dot{M}$(\fe)$^{d}$ &  $\dot{M}$(H$_2$)$^{f}$\\
     & km~s$^{-1}$  & arcsec  & $M_{\odot}$~yr$^{-1}$ &$M_{\odot}$~yr$^{-1}$ & &$M_{\odot}$~yr$^{-1}$
    & $M_{\odot}$~yr$^{-1}$  \\
\hline 
L--I & 300 &  0.1  &  1.8 $\times$ 10$^{-7}$ & 2.4 $\times$ 10$^{-7}$ & 1.3 & 2.2 $\times$ 10$^{-7}$  & 4.7 $\times$ 10$^{-9}$\\
H  &  300 &  0.15 &  1.6 $\times$ 10$^{-7}$ & 3.6 $\times$ 10$^{-8}$ & 0.2 &  7.1 $\times$ 10$^{-8}$ &   4.7 $\times$ 10$^{-10}$\\
G  &  305 &  0.2  &  2.4 $\times$ 10$^{-7}$ & 6.9 $\times$ 10$^{-8}$ & 0.3 &  1.0 $\times$ 10$^{-7}$ &   1.9 $\times$ 10$^{-9}$\\
F  &  300 &  0.3  &  3.1 $\times$ 10$^{-7}$ & 3.7 $\times$ 10$^{-8}$ & 0.1 &  5.2 $\times$ 10$^{-8}$ &   8.9 $\times$ 10$^{-10}$\\
E  &  281 &  0.3  &  2.3 $\times$ 10$^{-7}$ & 1.8 $\times$ 10$^{-8}$ & 0.08&  4.4 $\times$ 10$^{-8}$ &   1.3 $\times$ 10$^{-9}$\\
D  &  300 &  0.35 &  1.5 $\times$ 10$^{-7}$ & 1.5 $\times$ 10$^{-8}$ & 0.1 &  3.8 $\times$ 10$^{-8}$ &   1.8 $\times$ 10$^{-9}$\\
C  &  296 &  0.4  &  9.7 $\times$ 10$^{-8}$ & 1.1 $\times$ 10$^{-8}$ & 0.1&  2.9 $\times$ 10$^{-8}$  &   1.6 $\times$ 10$^{-9}$\\
B  &  317 &  0.5  &  1.7 $\times$ 10$^{-7}$ & 7.5 $\times$ 10$^{-9}$ & 0.04&  2.4 $\times$ 10$^{-8}$ &   2.1 $\times$ 10$^{-10}$\\
A  &  311 &  0.5  &  7.6 $\times$ 10$^{-8}$ & 5.1 $\times$ 10$^{-9}$ & 0.07&  2.8 $\times$ 10$^{-9}$ &   1.1 $\times$ 10$^{-9}$\\
\hline 
\end{tabular}}
\medskip
$^{a}$ Taken from the proper motion study by Bally et~al. (\cite{Ball02}). Total velocities~($v_{{\rm jet}}$) have been derived from these values assuming an inclination angle of~10$^{\circ}$.\\
$^{b}$ Taken from the FWHM intensity transverse profiles in HST~images of Reipurth et~al. (\cite{Reipu00}).\\
$^{c}$ $\dot{M}$($n_{\rm H},r_{\rm j},v_{\rm j}$)~= $\mu~m_{\rm H}~n_{\rm H}$~$\times$ $\pi~r_{{\rm jet}}^2~v_{{\rm jet}}$, where~$n_{\rm H}$ is the total density reported in Table~\ref{tab2}. Volume filling factors equal to unity are assumed.\\
$^{d}$ $\dot{M}$ measured from the luminosities of the \s\lam\lam~6716, 6731~lines and \fe 1.64~$\mu$m line.\\
$^{e}$ Volume filling factor estimated from the ratio between the observed and predicted line luminosities (see text). They are also equal to the ratio between~$\dot{M}$ and~$\dot{M}$($n_{\rm H},r_{\rm j},v_{\rm j}$) derived from line luminosities. \\
$^{f}$ $\dot{M}$ measured from the luminosity of the H$_2$~2.12~$\mu$m line, assuming the H$_2$~temperature estimated from the ratio of the different H$_2$ observed lines.
\end{table}