\begin{table}%t4
\caption{The regression coefficients for the transformations and normality lines.}
\label{coeffs}
\small%\centerline
{
\begin{tabular}{l|l|l}
\hline\hline
Cluster & $V$, $(B-V)$, $a_{0}$$^a$  & $N$  \\
\hline 
King~21 & $-0.42(16)+1.00(1)\cdot y$ & 19 \\
        & $0.61(1)+2.09(24)\cdot(g_{1}-y)$ & 19    \\
        & $0.277(3) + 0.267(16)\cdot(g_{1}-y)$ & 110 \\
NGC~3293  & $-5.31(8) + 1.00(1)\cdot y$ & 72 \\
        & $0.75(3)+2.63(11)\cdot(g_{1}-y)$ & 67 \\
        & $0.352(1) + 0.203(5)\cdot(g_{1}-y)$ & 241 \\
NGC~5999 & $-5.35(6) + 1.00(1)\cdot y$ & 278  \\
        & $0.64(1)+2.42(5)\cdot(g_{1}-y)$ & 273  \\
        & $0.279(1) + 0.100(3)\cdot(g_{1}-y)$ & 222  \\
NGC~6802 & $-0.15(19) + 1.06(1)\cdot y$ & 98 \\
        & $0.96(1)+2.96(9)\cdot(g_{1}-y)$ & 92  \\
        & $0.301(1) + 0.273(6)\cdot(g_{1}-y)$ & 274  \\
NGC~6830 & $0.93(15) + 0.98(1)\cdot y$  & 35 \\
        & $0.81(1)+2.76(7)\cdot(g_{1}-y)$ & 35  \\
        & $0.314(1) + 0.274(11)\cdot(g_{1}-y)$ & 87  \\
Ruprecht~44 & $-5.32(10) + 1.00(1)\cdot y$ & 75 \\
        & $0.71(1)+2.84(12)\cdot(g_{1}-y)$ & 75  \\
        & $0.271(1) + 0.273(1)\cdot(g_{1}-y)$ & 370  \\
Ruprecht~115 & $-4.30(7) + 1.00(1)\cdot y$  & 72  \\
        & $0.08(3)+2.76(7)\cdot(g_{1}-y)$ & 72  \\
        & $0.143(2) + 0.256(5)\cdot(g_{1}-y)$ & 132  \\
Ruprecht~120 & $-6.38(9) + 1.05(1)\cdot y$  & 93  \\
        & $0.92(1)+2.27(6)\cdot(g_{1}-y)$ & 93  \\
        & $0.265(1) + 0.270(4)\cdot(g_{1}-y)$ & 194  \\
\hline
\end{tabular}}
\medskip
$^a$ The absolute values and errors
vary due to the inhomogeneous "standard'' observations (photographic, photoelectric
and CCD) found in the literature as well as the dependence on the 
magnitude range in common, i.e. a~broader range guarantees a~small error.  
The errors of the last digits are given in parenthesis.
\end{table}