\begin{table}%t7
\caption{ Abundances in \ngc.\label{tab7}}
%\centerline
{\begin{tabular}{ccccccc}
\hline
\hline
Element & Present & Present & Zhang & Smith & NGC & Solar\\
        & ICF     & model   & Liu   &    & 6537 &   \\
\hline
He  & $\geq$0.080 & 0.20    & 0.086 & 0.20 & 0.149 & 0.085 \\
C(--4)    & $\leq$16.   & $\leq$2.63     &       &      & 1.75 &2.5  \\
N(--4)    & 3.0   & 3.75     & 2.4   & 4.7  & 4.5 &  0.61   \\
O(--4)   & 2.3    & 2.18     & 3.2   & 4.4  & 1.85 & 4.6 \\
Ne(--4)  & 1.2    & 1.10     & 0.44  & 0.60 & 1.7 &1.2 \\
Si(--5)   & 2.0   & 2.0      &       & 0.46 &    &   3.3 \\
S(--5)   & 1.0    & 1.0      & 1.4   & 1.2  & 1.1  & 1.4 \\
Cl(--7)   & 1.8   & 2.38     & 1.9   &      & 2.4 & 3.5 \\
Ar(--6)   & 5.0   & 2.70     & 14.   & 4.8  & 4.1 & 2.5 \\
Fe(--6)  &  7.8   & 10.0     & 12.6  &      &   & 28. \\   
\hline
\end{tabular}}
\par
\smallskip
The abundances listed "Zhang \& Liu'' are from Zhang \& Liu
 (\cite{zl}),  those listed "Smith'' from Smith (\cite{smith}),  NGC~6537 from 
Pottasch et~al. (\cite{pott2}) and
 Solar abundances are from Apslund et~al. (\cite{asplund}) except for Ne and Ar.
\par
\end{table}