\begin{table}%t1
%\centering
\par
      \caption{Values of mesogranule lifetime
and drift velocity
      from different authors.
        \label{tab1}}
              \begin{tabular}{lcc}
            \hline\hline
            \noalign{\smallskip}
               & \rm{lifetime} & $v_{\rm{drift}}$ [{\rm m~s}$^{-1}$] \\
            \noalign{\smallskip}
                        \hline
            \noalign{\smallskip}
              November et~al. (\cite{November81})\qquad & 2~{\rm h} & -   \\
              Deubner (\cite{Deubner89})  & ${\geq}30~{\min}$ & 450  \\
              Muller et~al.  (\cite{Muller92}) &  3~{\rm h} & $300{-}400$  \\
            Ueno \& Kitai (\cite{Ueno98})  & ${\simeq} 40~{\min}$ & 446   \\
            Roudier et~al. (\cite{Roudier98}) & $30{-}40~{\min}$ & 500   \\
             &    & ($t \geq 70 {\min}$) \\
               Ploner et~al. (\cite{Ploner00})  & $1{-}2~{\rm h}$ & -  \\
                Shine et~al. (\cite{Shine00})  & $4{-}6~{\rm h}$ & $500{-}1000$   \\
                present work  & $158~{\min}$ & 304  \\
                                     \hline
         \end{tabular}
   \end{table}