\begin{table}%t1
%\centering
\par
\caption{Journal of the spectrographic observations conducted with the B$\&$C
spectrograph.}\label{t1}
\begin{tabular}{llrlccl}
\hline
\hline
\noalign{\smallskip}
Id. &Date          &Expo.      & Grating &  Range& Slit width     & $FWHM$  \\              
 &           & (s)     & ($\AA$/mm) &    
($\AA$)&($\arcsec$) &($\AA$)    \\
%          &           &          &         &                 &         &         \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
N88   &14/12/88  &1800      & 114    &  3500--5000    &  2      & 4    \\ 
     &28/10/91     &1800      &          & 3600--7400                      &         &     \\
     &                 &1800      &          &                        &         &      \\
    &8/11/91       &1800      &          &                        &         &      \\
    &                 &120         &          &                        &         &      \\
    & 10/11/91    &1800      &          &                         &         &     \\
    &10/11/91     &1800      &          &                         &         &      \\
    &26/12/95     &3400      & 30      &  4000--4900       &         &1.1   \\
    &28/12/95     &3700      &          &                          &         &      \\
     &28/12/95    &1800      &          &                          &         &     \\
     &14/12/97    &30          & 114    &  3700--7400       & 4       & 7   \\
     &               &600          &          &                         &         &      \\
     &15/12/97  &600          &          &  6500--10~100      &         &     \\
    &                &60            &          & 6500--10~100      &           &     \\
\hline
\end{tabular}
\end{table}