\begin{table}%t1
%\centering
\par
\caption{\protect\label{tab_zind}
Summary of results with
magnetic diffusivity $\eta$ independent of $z$
(i.e., $\eta_1=1$), $R_\alpha=-1.85$, $R_\omega=185$, $R_u=0.64$,
$\alpha_{\rm SS}=0.01$,
${\cal P}=1$, and $\lambda=0.43$.
$E_{\rm t}$ and $E_{\rm d}$ are the field energies in the
whole computational domain and near the
disc respectively (see text), $s=E_P/E_T$
is the ratio of energies in the poloidal and toroidal magnetic field
in the whole domain, and $F_0$ is the signed flux through
the disc plane in $r\le 1$.
The final entry (asterisked) has $R_\alpha=0$, and refers to a purely
advective calculation, with no dynamo action.
}
\begin{tabular}{rccll}
\hline\hline
$B_{\rm ext}$ &$E_{\rm t}\times10^{-4}$ &$E_{\rm d}\times10^{-4}$ &$s\times10^6$   &$\phzero F_0$ \\
\hline
0.0\phzero      &$5.1$          &$4.8$            &$\phzero\phzero2.9$ &$\phzero0.40$  \\%run205
0.01            &$5.1$          &$4.8$            &$\phzero\phzero3.3$ &$\phzero0.41$ \\%run212
0.03            &$5.3$          &$4.9$            &$\phzero\phzero4.6$ &$\phzero0.50$\\%run21r7
0.10            &$6.0$          &$5.5$            &$\phzero\phzero1.7$ &$\phzero0.83$ \\%run214
1.0\phzero      &$34\tphzero$   &$25\tphzero$     &$230\phzero$        &$\phzero5.37$  \\%run215
10.0\phzero     &$2.8\times10^3$&$1.8\times10^3$  &$280\phzero$        &$54.7$\\%run216
\hline
$*1.0\phzero$   &$28\tphzero$   &$18\tphzero$     &$280\phzero$        &$\phzero5.47$  \\%run219
\hline
\end{tabular}
\end{table}