\begin{table}%t3
\caption{\label{t:3}Logarithmic metal abundances of the opacity tables for
  varying C/O ratios.}
%\centerline
{\small
\begin{tabular}{ccccccccccc}
\hline\hline
& Set~2$^a$ & Set~3 & Set 4 & Set 5 & Set 6 & Set 8 & Set 9 & Set 10 & Set 11 & Set 12 \\
el. & C/O = 0.9 &
C/O = 1.0 & C/O = 1.1 & C/O = 3.0 & C/O = 20.0 & C/O = 0.9 & C/O = 1.0 & C/O = 1.1 & C/O = 3.0 & C/O = 20.0 \\
\hline
C  & 8.90 & 8.97 & 9.03 & 9.48 & 10.47 & 9.35 & 9.42 & 9.48 & 9.89 & 10.87 \\
N  & 8.14 & 8.18 & 8.22 & 8.56 & 8.91  & 8.45 & 8.50 & 8.56 & 8.92 & 9.29 \\
O  & 8.95 & 8.97 & 8.99 & 9.00 & 9.17  & 9.40 & 9.42 & 9.44 & 9.42 & 9.57 \\
Ne & 8.07 & 8.07 & 8.07 & 8.07 & 8.07  & 8.47 & 8.47 & 8.47 & 8.47 & 8.47 \\
Na & 6.33 & 6.33 & 6.33 & 6.33 & 6.33  & 6.33 & 6.33 & 6.33 & 6.33 & 6.33 \\
Mg$^b$ & 7.58 & 7.58 & 7.58 & 7.58 & 7.58  & 7.98 & 7.98 & 7.98 & 7.98 & 7.98 \\
\ldots & \ldots & \ldots & \ldots & \ldots & \ldots &\ldots & \ldots &
\ldots & \ldots & \ldots \\
\hline
\end{tabular}}
\medskip
$^a$~Sets 1 and 7 are omitted as they correspond to the standard solar-scaled and $\alpha$-enhanced distributions of Table~\ref{t:2}; $^b$~table ends at Mg since  elements heavier than oxygen remain as in the base mixtures.
\end{table}