\begin{table}%t13
\caption{Comparison of abundances in \object{NGC~3242}.\label{tab13}}
%\centerline
 {\begin{tabular}{lrrrrrr}
\hline
\hline\\[-3mm]
Elem.  & Present & T$^{\dagger}$ & H$^{\dagger}$& HK$^{\dagger}$ & B$^{\dagger}$ & Solar$^{\dagger}$  \\ 
\hline  
He      & 0.092 & 0.10 & 0.081& 0.11 & 0.091 & 0.098   \\
C(--4)  & 1.95  &      & 4.12 &      & 2.6   & 2.5  \\
N(--4)  & 1.35  & 0.34 & 0.61 & 0.49 & 0.89  & 0.84 \\
O(--4)  & 3.8   & 3.31 & 3.38 & 4.1  & 4.35  & 4.6  \\
Ne(--5) & 9.0   & 7.8  & 5.1  & 8.6  & 11.0  & 12   \\
S(--6)  & 2.8   & 2.38 &      & 2.1  & 3.2   & 14   \\   
Ar(--6) & 1.7   & 0.98 &      & 1.5  & 1.4   & 4.2 \\
Cl(--7) & 0.70  & 0.88 &      & 1.1  &       & 3.5   \\
P(--8)  & 4.5   &      &      &      &       & 23   \\
\hline  
\end{tabular}}
\par
\smallskip
$^{\dagger}$ References: T: Tsamis et~al. (\cite{tsamis}), H: Henry et~al. 
(\cite{henry}), HK: Henry et al. (2004), B: 
Barker (\cite{barker}),  Solar: Asplund et~al. (\cite{asplund}), except Ne and 
Ar (see Pottasch \& Bernard-Salas  \cite{pbs}).
\end{table}