\begin{table}%t6
\caption{\label{tab-xl80}RRLSs observed with the 0.8-m telescope in the Xinglong
Station.} 
%\centerline
{
\begin{tabular}{lccc}
\hline\hline
 Variable & [Fe/H]$_{\rm Spec}$ & [Fe/H]$_{\rm Four}$ & $\rm \Delta[Fe/H]$ \\
\hline
V452 Oph & --1.45 & --1.45 & 0.00  \\
VX Her   & --1.21 & --1.21 & 0.00  \\
KX Lyr   & --0.24 & --0.21 & --0.03 \\
IO Lyr   & --1.1  & --0.96 & --0.14 \\
ST Oph   & --1.02 &  0.31 & --1.33 \\
\hline
\end{tabular}}
\smallskip
 Notes: [Fe/H]$_{\rm Spec}$ and [Fe/H]$_{\rm Four}$  are
[Fe/H] derived from the spectrum and by the Fourier method,
respectively. 
\end{table}