\begin{table}%t4
\caption{\label{t:meanabu}Mean abundances from UVES and GIRAFFE spectra for stars in the
GC M~54 and Sgr nucleus.}
\par
%\centering
\par
\begin{tabular}{lcccc}
\hline \hline \noalign{\smallskip}
                     &   M~54        &   M~54         &     Sgr       &   Sgr         \\
Element              &  UVES         & GIRAFFE        & UVES          & GIRAFFE       \\
                     &$n$~~~   avg~  rms &$n$~~   avg~~  rms  &$n$~~   avg~~  rms &$n$~~   avg~~  rms \\        
\hline
$[$O/Fe$]${\sc i}    &7 $-$0.02 0.47 &69   +0.08 0.33 &2 $-$0.00 0.09 &25 $-$0.10 0.21\\
$[$Na/Fe$]${\sc i}   &7   +0.33 0.39 &69   +0.43 0.31 &2 $-$0.19 0.27 &25 $-$0.04 0.25\\
$[$Mg/Fe$]${\sc i}   &7   +0.28 0.09 &67   +0.35 0.18 &2   +0.09 0.06 &25   +0.16 0.11\\
$[$Al/Fe$]${\sc i}   &6   +0.65 0.62 &		      &2 $-$0.09 0.33 & 	      \\
$[$Si/Fe$]${\sc i}   &7   +0.36 0.08 &69   +0.42 0.10 &2   +0.20 0.10 &25   +0.23 0.11\\
$[$Ca/Fe$]${\sc i}   &7   +0.32 0.08 &69   +0.36 0.10 &2   +0.14 0.01 &25   +0.25 0.18\\
$[$Sc/Fe$]${\sc ii}  &7 $-$0.08 0.12 &69   +0.00 0.09 &2 $-$0.22 0.02 &25 $-$0.17 0.11\\
$[$Ti/Fe$]${\sc i}   &7   +0.18 0.10 &69   +0.16 0.14 &2   +0.03 0.08 &25   +0.08 0.11\\
$[$Ti/Fe$]${\sc ii}  &7   +0.27 0.12 &		      &2   +0.08 0.21 & 	      \\
$[$V/Fe$]${\sc i}    &7 $-$0.07 0.09 &69 $-$0.16 0.16 &2   +0.17 0.25 &21 $-$0.01 0.16\\
$[$Cr/Fe$]${\sc i}   &7   +0.06 0.09 &69 $-$0.03 0.09 &2 $-$0.10 0.03 &25 $-$0.07 0.14\\
$[$Mn/Fe$]${\sc i}   &7 $-$0.49 0.09 &		      &2   +0.01 0.14 & 	      \\
$[$Fe/H$]${\sc i}    &7 $-$1.51 0.16 &69 $-$1.56 0.19 &2 $-$0.74 0.22 &25 $-$0.61 0.36\\
$[$Fe/H$]${\sc ii}   &7 $-$1.48 0.17 &69 $-$1.52 0.16 &2 $-$0.73 0.11 &18 $-$0.69 0.39\\
$[$Co/Fe$]${\sc i}   &7 $-$0.15 0.15 &45 $-$0.08 0.06 &2 $-$0.29 0.11 &19 $-$0.20 0.09\\
$[$Ni/Fe$]${\sc i}   &7 $-$0.09 0.03 &69 $-$0.10 0.06 &2 $-$0.17 0.07 &25 $-$0.13 0.05\\
$[$Cu/Fe$]${\sc i}   &7 $-$0.61 0.18 &                &2 $-$0.55 0.07 &               \\
\hline
\end{tabular}
\end{table}