\begin{table}%t3 \caption{\label{tab3}Abundances of oxygen and nitrogen adopted from calculations by \cite{Gorny2009} and compared to earlier published results.} \small%\centering \par \begin{tabular}{ l c c @{\hspace{1.40cm}} l} \hline \hline\noalign{\smallskip} & \multicolumn{2}{c}{This work~~~~~~~~~~} & ~~~~~~~~~~~~~~Literature \\ & log O/H+12 & log N/O & (log O/H + 12; log N/O) \\ \hline\noalign{\smallskip} H 1-16 & 8.83 & $-$1.06 & (9.09; --1.32)$^{\rm Sa}$ \\ Hb 6 & 8.66 & $-$0.18 & (8.71; --0.06)$^{\rm AK}$ \\ M 2-10\tablefootmark{a} & 8.67 & $-$0.28 & (8.78; --)$^{\rm G}$~~ (8.86; --0.49)$^{\rm R}$~~ (9.00; --0.55)$^K$~~ (8.90; --0.59)$^{\rm St}$ \\ H 1-50 & 8.66 & $-$0.37 & (8.65; --0.51)$^{\rm E}$ \\ \noalign{\smallskip} H 1-20 & 8.61 & $-$0.10 & (8.97; --0.56)$^{\rm E}$~~ (8.45; --)$^{\rm G}$~~ (8.97; --0.23)$^{\rm R}$~~ (9.30; --0.67)$^{\rm Sa}$~~ (8.73; --0.44)$^{\rm K}$ \\ Th 3-4 & 8.22 & $-$0.11 & \\ M 3-38 & 8.39 & 0.19 & (8.37; 0.32)$^{\rm R}$~~ (8.79; --0.61)$^{\rm Sa}$~~ (8.54; --0.22)$^{\rm K}$~~ (8.37; --)$^{\rm St}$ \\ M 3-8 & 8.38 & $-$0.26 & (8.59; --0.42)$^{\rm E}$~~ (9.02; --0.27)$^{\rm R}$~~ (8.12; --0.27)$^{\rm C}$~~ (8.15; --0.33)$^{\rm St}$ \\ \noalign{\smallskip} H 1-40 & 8.19 & $-$0.25 & (9.09; --0.04)$^{\rm E}$~~ (8.23; --0.45)$^{\rm HS}$~~ (8.70; --0.62)$^{\rm R}$~~ (8.62; 0.02)$^{\rm St}$ \\ M 2-23 & 8.35 & $-$0.99 & (8.48; --1.44)$^{\rm E}$~~ (8.67; --1.00)$^{\rm HS}$~~ (8.21; --0.13)$^{\rm St}$~~ (8.22; --0.82)$^{\rm R}$~~ (8.48; 0.20)$^{\rm K}$ \\ He 2-260 & 8.00 & $-$0.76 & \\ H 1-32 & 8.59 & $-$1.21 & (8.55; --0.23)$^{\rm St}$~~ (8.12; --0.53)$^{\rm R}$ \\ H 1-35 & 8.65 & $-$1.19 & (8.31; --0.92)$^{\rm R}$~~ (8.27; --0.89)$^{\rm K}$ \\ \hline \end{tabular} \tablefoot{Results by \cite{Cuisinier2000}, \cite{Escudero2004}, \cite{Gorny2004} and \cite{WangLiu2007} are not presented as the line measurements from these papers were used by \cite{Gorny2009}.\\ \tablefoottext{a}{The values adopted are the averages of original calculations (see Table~4) by \cite{Gorny2009} and from \cite{Stasinska1998}.}}\vspace{-2mm} \tablebib{AK -- \cite{AllerKeyes1987}, C -- \cite{Costa1996}, E -- \cite{Exter2004}, G -- \cite{Gutenkunst2008}, R -- \cite{Ratag1997},\\ K -- \cite{Koeppen1991}, Sa -- \cite{Samland1992}, St -- \cite{Stasinska1998}, HS -- \cite{HoofSteene1999}.} \par \end{table}