\begin{table}%t2
%\centering
\par
\caption{Equivalent widths of the helium lines measured with the SARG-TNG and at Catania Astrophysical 
           Observatory (last two columns). We compared our measurements with the B-type stars of similar 
           effective temperature extracted from Gies \& Lambert (\cite{gies92}). All equivalent widths 
           are expressed in m{\AA}.\label{he_ew}}
\begin{tabular} {l|ccccc|l}
\hline
\hline
           &  A  &  B  &  C  &   D  &  E  &  \multicolumn{1}{c}{HD~207538}   \\
He{\sc ii} &     &     &     &      &     &  {\tiny SARG-TNG}       ~~~~{\tiny Catania}   \\
\hline
4686       & 206 & 192 & 747 &  602 & 858 & 500 $\pm$ 60              \\
5411       &     &     &     &      &     & 203 $\pm$ 34 ~~250 $\pm$ 40\\
\hline
\hline
He{\sc i}  &     &     &     &      &     &                           \\
\hline
4713       & 251 & 246 & 243 &  230 & 235 & 297 $\pm$ 28              \\
4921       &     &     &     &      &     & 514 $\pm$ 44  ~~580 $\pm$ 40\\
5015       & 260 & 268 & 262 &  258 & 268 & 309 $\pm$ 20  ~~308 $\pm$ 21\\
5047       & 139 & 144 & 114 &  130 & 102 & 142 $\pm$ 19  ~~176 $\pm$ 20\\
5876       &     &     &     &      &     & 825 $\pm$ 29              \\
6678       &     &     &     &      &     & 714 $\pm$ 33              \\
7065       &     &     &     &      &     & 637 $\pm$ 54              \\
\hline
\end{tabular}
\begin{flushleft}
A - HD~34816, $T_{\rm eff} = 29~890$~K, $\log g = 4.22$, $\xi = 6.7$~km~s$^{-1}$.\\
B - HD~36960, $T_{\rm eff} = 29~960$~K, $\log g = 4.30$, $\xi = 4.3$~km~s$^{-1}$.\\
C - HD~34078, $T_{\rm eff} = 31~420$~K, $\log g = 4.07$, $\xi = 6.9$~km~s$^{-1}$.\\
D - HD~36512, $T_{\rm eff} = 32~470$~K, $\log g = 4.29$, $\xi = 5.7$~km~s$^{-1}$.\\
E - HD~214680, $T_{\rm eff} = 34~370$~K, $\log g = 4.29$, $\xi = 12.2$~km~s$^{-1}$.
\end{flushleft}
\end{table}