\begin{table}%t2
\caption {Comparison between our solar abundances (second Col.) and those of
Grevesse \&  Sauval  (2000) (third column).   For  iron, the abundance
value obtained using ionised lines is also given.  The number of lines
and the  standard deviation of  the measurements  for each species are
also  reported  in the fourth and  in  the fifth  column respectively.
When only three or two lines are  measured (sodium and aluminum), half
of the difference between the  maximum and  minimum value is  reported
instead of the standard deviation.
\label{solarres}}
%\centerline
 {\begin{tabular}{c c c c c}
\hline\hline
$X$ &$A(X)$$_{\rm our}$&$A(X)_{\rm litt}$&Number&$\sigma$\\
&&&of lines\\
\hline
Fe{\sc i} & 7.52 & 7.50  &66&0.03\\
Fe{\sc ii}& 7.57 & 7.50  &11&0.03\\
Na{\sc i} & 6.37 & 6.33  & 3&0.11\\
Al{\sc i} & 6.47 & 6.47  & 2&0.02\\
Si{\sc i} & 7.56 & 7.55  & 9&0.03\\
Ca{\sc i} & 6.36 & 6.36  &11&0.03\\
Ti{\sc i} & 4.97 & 5.02  &11&0.02\\
Cr{\sc i} & 5.65 & 5.64  & 6&0.06\\
Ni{\sc i} & 6.25 & 6.25  &23&0.04\\
\hline
\end{tabular}}
\end{table}