\begin{table}%t6
\caption{\label{tab6}Abundance uncertainties of BD+04$^\circ$2466. The second column gives
the variation of the abundance  caused by the variation in $T_{\rm eff}$. The other columns refer to the variations due to $\log g$, $\xi$ and $W_\lambda$. The sixth column gives the compounded rms uncertainty of the second to fifth columns. The last column gives the observed abundance dispersion for those elements whose abundances were derived using more than three lines.}
\par
%\centering
\small
\begin{tabular}{lcccccc}
\hline\hline
%&&&&&& \\[-8pt]
Species & $\Delta$ $T_{\rm eff}$ & $\Delta$ log $g$ & $\Delta$ ~$\xi$
& $\Delta$ $W_{\lambda}$ & $\left( \sum \sigma^2 \right)^{1/2}$ &
$\sigma$$_{\rm obs}$\\
$_{\rule{0pt}{8pt}}$ & $+120$~K  & $+0.1$ & $+0.2$  & 3 m\AA &   &   \\
\hline
Fe~{\sc i}    & +0.10 & --0.01 & +0.08 & +0.07 & 0.15 & 0.08 \\
Fe~{\sc ii}   & +0.01 & +0.09 & --0.05 & +0.16 & 0.19 & 0.08 \\
Na~{\sc i}    & +0.05 &  0.00 & --0.01 & +0.05 & 0.07 & ---  \\
Si~{\sc i}    & +0.04 &  0.00 & --0.01 & +0.09 & 0.10 & ---  \\
Ca~{\sc i}    & +0.11 & --0.01 & --0.07 & +0.04 & 0.14 & 0.20 \\
Sc~{\sc ii}   & --0.02 & +0.06 & --0.03 & +0.04 & 0.08 & 0.12 \\
Ti~{\sc i}    & +0.09 & --0.01 & --0.10 & +0.04 & 0.14 & ---  \\
Cr~{\sc i}    & +0.19 & --0.01 & --0.04 & +0.04 & 0.20 & 0.06 \\
Mn~{\sc i}    & +0.20 & +0.01 & --0.05 & +0.03 & 0.21 & --- \\
Ni~{\sc i}    & +0.11 & +0.01 & --0.01 & +0.05 & 0.12 & 0.18 \\
Zn~{\sc i}    & --0.11 & +0.02 & --0.04 & +0.04 & 0.13 & ---  \\
Y~{\sc ii}    & 0.00  & +0.05 & --0.10 & +0.04 & 0.06 & ---  \\
Zr~{\sc ii}   & +0.01 & +0.07 & --0.05 & +0.05 & 0.10 & 0.19 \\
Ba~{\sc ii}   & +0.04 & +0.10 & --0.20 & +0.05 & 0.23 & ---  \\
La~{\sc ii}   & +0.02 & +0.11 & --0.02 & +0.04 & 0.12 & 0.05 \\
Ce~{\sc ii}   & +0.01 & --0.10 & --0.02 & +0.05 & 0.11 & 0.15 \\
Nd~{\sc ii}   & +0.02 & +0.09 & --0.04 & +0.07 & 0.12 & 0.12 \\
\hline
\end{tabular}
\end{table}