\begin{table}%t3
	\caption{\label{table:3}Abundances in the envelope of IRC+10216.} 
                %\centerline
 {
	\begin{tabular}{lccccccccc}
	\noalign{\smallskip}
	\hline
	\hline
	\noalign{\smallskip}
El. & Ion & $N$     &  $C_{\rm i}$\tablefootmark{a}  &   $N$({\sc i}+{\sc ii})   &    $N$({\sc
	i}+{\sc ii})/$N$(H) & $X_\odot$   & $\log_{10} \delta$  &
	$\log_{10} \delta_{7027}$ & $\log_{10} \delta_{\zeta~\rm{Oph}}$  \\
 &  &  (cm$^{-2}$) &   & (cm$^{-2}$) \\
	\noalign{\smallskip}
	\hline
	\noalign{\smallskip}
Na  & \sc{i}   & $\phantom{<}$4.6(14) &  1.22  & 5.6(14) & 4.2($-$7) &
2.00($-$6) & $-$0.68 & $-$0.06 & $-$0.95 \\
\noalign{\smallskip}
Al  & \sc{i} & $<$2.8(12)           & 3.5(3)& $<$9.8(15) &   $<$7.3($-$6)
& 2.88($-$6) & $\ldots$\tablefootmark{c}  & $\ldots$ & $\ldots$ \\
\noalign{\smallskip}
K   & \sc{i} & $\phantom{<}$4.6(12) &  1.60  & 7.4(12) &  5.5($-$9) &
1.29($-$7) & $-$1.37 &  $-$0.17 &  $-$1.09\\ 
\noalign{\smallskip}
Ca  & \sc{i} & $\phantom{<}$1.9(12) &  4.70  & 8.9(12)\tablefootmark{b}
&  6.6($-$9) & 2.19($-$6) & $-$2.52 & $-$0.75 & $-$3.73  \\
    & \sc{ii} & $\phantom{<}$7.0(12) &  1.27  & $\ldots$ & $\ldots$
&    $\ldots$ & $\ldots$ & $\ldots$ & $\ldots$\\
\noalign{\smallskip}
Ti  & \sc{i} & $<$1.9(12)           &  4.26  & $<$3.9(12)\tablefootmark{b}   &  $<$2.9($-$9) &
8.32($-$8) & $<$$-$1.45 & $\ldots$  & $-$3.02\\
      & \sc{ii}  & $<$2.0(12)       &  1.31  & $\ldots$    &  $\ldots$
& $\ldots$  & $\ldots$ & $\ldots$ & $\ldots$  \\
\noalign{\smallskip}
Cr  & \sc{i} & $\phantom{<}$1.4(12) &  10.6 & 1.5(13) & 1.1($-$8) &
4.47($-$7) & $-$1.60 &   $\ldots$ &  $-$2.28 \\
\noalign{\smallskip}
Mn  & \sc{i} & $<$3.1(12)           &  2.21  &  $<$6.9(12) &
$<$5.1($-$9) & 3.16($-$7) &  $<$~$-$1.79 &  & $-$1.45 \\
\noalign{\smallskip}
Fe  & \sc{i} & $\phantom{<}$8.8(13) &  2.58  & 2.3(14) & 1.7($-$7) &
2.95($-$5)  & $-$2.24 &  $-$1.68 & $-$2.27 \\
\noalign{\smallskip}
Sr & \sc{ii} & $<$2.7(11)           &  3.82  & $<$1.0(12) &  $<$7.6($-$10) &
8.13($-$10)& $\ldots$\tablefootmark{c}  &   $\ldots$ &   $\ldots$ \\
 \noalign{\smallskip}
 \hline
 \end{tabular}}
\par
\tablefoot {\tablefoottext{a} {Ionization correction $C_{\rm i} = N({\rm\sc  I} + {\sc
 \rm  II}) /N({\sc \rm i})$ for neutral species and  $N({\sc\rm  I} + {\sc \rm II})
  /N({\sc\rm  II})$ for singly ionized species.} 
 \tablefoottext{b} {Based on observed values of $N$({\sc i}) + $N$({\sc
  ii}), independent of $C_{\rm i}$.}
 \tablefoottext{c} {Upper limit on $X > X_\odot$, no useful limit
  on~$\delta$. }}
\par
\end{table}