\begin{table}%t1
\caption{Abundances of C, N, O, Na, and isotopic ratios $^{12}$C/$^{13}$C 
in stars of 47 Tuc, NGC~6752 and NGC~6397. \label{t:cno}}
%\begin{tabular}{rccrrlrclrcrr}
%\centerline
{ \begin{tabular}{rccrcr}
\hline\hline
Star   & [C/Fe]  & [N/Fe]& [O/Fe] & [Na/Fe]&   $^{12}$C/$^{13}$C \\
\hline
\\
\multicolumn{6}{c}{NGC~6397 -- dwarfs}      \\
\\
  1905 &$<$+0.50& $<$2.0&   +0.24 &  +0.09 &      \\ 
202~765 &$<$+0.50& $<$1.5&   +0.33 &  +0.13 &      \\ 
201~432 &$<$+0.50& $<$1.5&   +0.21 &  +0.15 &      \\ 
  1543 &$<$+0.50& $<$1.5&   +0.28 &  +0.28 &      \\ 
  1622 &$<$+0.50& $<$2.0&   +0.23 &  +0.35 &      \\ 
\\
\multicolumn{6}{c}{NGC~6397 -- subgiants}      \\
\\
   706 &   +0.10& $-$0.5&   +0.54 &$-$0.48 &      \\
   760 &   +0.10& $-$0.5&   +0.39 &$-$0.43 &      \\
   777 &   +0.15&   +0.2&   +0.39 &$-$0.25 &      \\
   737 &   +0.15&   +1.4& $<$0.06 &  +0.19 &      \\
   793 & $-$0.10&   +1.2& $<$0.06 &  +0.23 &      \\
   703 &   +0.00&   +1.5& $<$0.06 &  +0.30 &      \\
206~810 & $-$0.07&   +1.3& $<$0.31 &  +0.32 &      \\
   729 & $-$0.10&   +1.4& $<$0.06 &  +0.48 &      \\
   669 &   +0.01&   +1.3&   +0.31 &  +0.53 &      \\
\\
\multicolumn{6}{c}{NGC~6752 -- dwarfs}      \\
\\
  4428 &   +0.09&    +1.1&   +0.33 &$-$0.29 &     \\ 
  4383 &   +0.12&    +1.2&   +0.57 &$-$0.18 &     \\ 
202~316 &   +0.12&    +1.5&   +0.27 &$-$0.06 &     \\ 
  4341 &   +0.21&    +1.4&   +0.20 &  +0.20 &     \\ 
  4661 & $-$0.20&    +1.4& $-$0.35 &  +0.29 &     \\ 
  4458 & $-$0.20&    +1.5&   +0.02 &  +0.31 &     \\ 
  5048 & $-$0.20&    +1.5& $-$0.30 &  +0.37 &     \\ 
  4907 & $-$0.20&    +1.5& $-$0.25 &  +0.58 &     \\ 
200~613 & $-$0.20&    +1.7&         &  +0.62 &     \\ 
\\
\multicolumn{6}{c}{NGC~6752 -- subgiants}      \\
\\
  1406 & $-$0.13&    +0.0&   +0.44 &  +0.02 &  9  \\
  1665 & $-$0.28&    +1.0&         &  +0.10 & 11  \\
  1445 & $-$0.42&    +1.2&         &  +0.14 &  5  \\
  1400 & $-$0.25&    +1.0&   +0.38 &  +0.20 &  9  \\
  1563 & $-$0.33&    +1.3&   +0.42 &  +0.26 &  5  \\
  1461 & $-$0.32&    +1.3&         &  +0.28 &  5  \\
202~063 & $-$0.37&    +1.2&   +0.53 &  +0.31 &  3  \\
  1460 & $-$0.49&    +1.4& $<$0.29 &  +0.42 &  5  \\
 1481 & $-$0.51&    +1.3&         &  +0.51 &  4  \\
\\
\multicolumn{6}{c}{NGC 104 -- dwarfs}         \\
\\
1081   &$-$0.13 &$-$0.50&    +0.57& $-$0.34& $>$10\\
1012   &$-$0.10 &$-$0.30&    +0.48& $-$0.14& $>$10\\
 975   &$-$0.13 &$-$0.30&    +0.40&   +0.22& $>$10\\
\\
\multicolumn{6}{c}{NGC 104 -- subgiants}      \\
\\
   482 &$-$0.16 &  +0.10&    +0.61&  +0.06 &   12 \\
206~415 &$-$0.11 &$-$0.25&    +0.52&  +0.10 &   10 \\
201~075 &$-$0.12 &$-$0.30&    +0.41&  +0.11 &    9 \\
   433 &$-$0.32 &  +1.10&	  &  +0.24 &   10 \\
   456 &$-$0.28 &  +1.00& $<$$+0.19$&  +0.28 &   12 \\
201~600 &$-$0.50 &  +1.10& $<$$+0.09$&  +0.30 &   10 \\
   435 &$-$0.31 &  +0.70& $<$$-0.19$&  +0.31 &    9 \\
   429 &$-$0.35 &  +0.50&  $-$0.01&  +0.31 &    6 \\
   478 &$-$0.30 &  +0.90&	  &  +0.37 &    9 \\
\hline
\end{tabular}}
\par
\smallskip\smallskip\smallskip
 Values of [N/Fe] in the subgiants of 47 Tuc are the average of the
abundances estimated from the synthesis of the 3883~\AA\ and the 4215~\AA\ 
regions.
\end{table}