\begin{table}%t1
%\centering
\par
\caption{Populations of the "normal'' Es ({\it Nop}~subsample). The correlations between the central velocity dispersion and the various colour-indices are given in the form $y=px+y0$, where $x=\log \sigma_0$ (1)~Index; (2)~Number of objects (not taking into account the 1 to 3 rejected by the least squares routine); (3)~Mean value $C_{\rm m}$ (4)~Slope $p$; (5)~Intercept $y_0$; (6)~Standard deviation $\sigma$; (7)~Coefficient of correlation $\rho$.}\label{tab1}
\begin{tabular}{lllllll}
\hline \hline    
Index & $N$ &$C_{\rm m}$ & $p$ & $y_0$ & $\sigma$ & $\rho$ \\
\hline
$V-J$ & 74 & 2.341 & $0.604\pm.068$ & $+0.932\pm.007$ & .060 & 0.73 \\ 
$V-K$ & 73 & 3.263 & $0.780\pm.076$ & $+1.441\pm.008$ & .071 & 0.74 \\ 
$J-H$ & 75 & 0.692 & $0.075\pm.018$ & $+0.517\pm.002$ & .017 & 0.44 \\ 
$J-K$ & 73 & 0.921 & $0.172\pm.019$ & $+0.520\pm.002$ & .018 & 0.72 \\
$H-K$ & 71 & 0.230 & $0.084\pm.014$ & $+0.035\pm.001$ & .013 & 0.57 \\
\hline
\end{tabular}
\end{table}