\begin{table}%t2
%\centering
\par
\caption{Magnetic fields derived from the H$\gamma$ and H$\beta$ lines for our 
sample of white dwarfs. $B({\sigma})$ provides the magnetic field in units of 
the\protect $\sigma$~level. Detections exceeding the~$3\sigma$ levels are given in 
bold. $\sigma(V)$ is the standard deviation of the observed \mbox{($V/I$)-spectrum}
obtained in\protect  the region 4500--4700~\ang. Lower limits on the detectability of 
the magnetic field from the line polarisation peaks, calculated at the~$1\sigma$ level of the noise, are given in the last two columns. Multiple 
observations that were averaged prior to analysis are labeled {\sc average}.\label{t:mf}}
\begin{tabular}[c]{lccrrrrrr}
\hline
\hline
\multicolumn{1}{c}{Target} & \multicolumn{1}{c}{Date} & 
\multicolumn{1}{c}{$\sigma(V)$} & \multicolumn{2}{c}{$B$(G)} & 
\multicolumn{1}{c}{$B({\rm G})$} & \multicolumn{1}{c}{$B({\sigma})$} &
\multicolumn{2}{c}{$B$(G) at $1\sigma$}\\
\multicolumn{1}{c}{} & \multicolumn{1}{c}{} & 
\multicolumn{1}{c}{(10$^{-3}I_{\rm c}$)} & 
\multicolumn{1}{c}{H$\gamma$} & \multicolumn{1}{c}{H$\beta$} & 
\multicolumn{1}{c}{H$\gamma, \beta$} & \multicolumn{1}{c}{H$\gamma, \beta$} & 
\multicolumn{1}{c}{~~~H$\gamma$} & \multicolumn{1}{c}{~~~H$\beta$} \\
\hline
\object WD~0135$-$052 & 29/11/02 & 1.2 &   $1112\pm625$ &    $492\pm373$ &    $654\pm320$ & 2.04 & 1277 &   861 \\[2pt]
\object WD~0227+050   & 28/12/02 & 1.0 &   $493\pm1177$ &   $-776\pm707$ &   $-439\pm606$ & 0.72 & 2486 &  $-$1928 \\
               & 29/01/03 & 1.0 &   $-710\pm971$ &   $1854\pm709$ &    $962\pm572$ & 1.68 & $-$2969 &  1989 \\
          & {\sc average} & 0.7 &   $-105\pm789$ &    $590\pm469$ &    $408\pm403$ & 1.01 & $-$1924 &  1194 \\[0.08cm]
\object WD~0310$-$688 & 24/02/03 & 0.8 &   $-504\pm741$ &    $114\pm548$ &   $-104\pm440$ & 0.24 & $-$2106 &  1404 \\[0.08cm]
\object WD~0346$-$011 & 28/12/02 & 1.8 & $-9299\pm8510$ & $-6815\pm5295$ & $-7508\pm4495$ & 1.67 & $-$36860 & $-$16600 \\
               & 03/02/03 & 2.6 &  $3222\pm9374$ &  $7542\pm6717$ &  $6076\pm5459$ & 1.11 & 28440 & 24820 \\
          & {\sc average} & 1.1 & $-5967\pm7087$ & $-1496\pm4226$ & $-2668\pm3629$ & 0.74 & $-$23060 & $-$10680 \\[0.08cm]
\object WD~0446$-$789 & 30/11/02 & 1.3 &   $417\pm1403$ &   $4251\pm910$ &   {\boldmath$3115\pm763$} & 4.08 & 3731 &  2340 \\
               & 28/01/03 & 1.4 &  $7771\pm1476$ &  $5370\pm1196$ &   {\boldmath$6321\pm929$} & 6.80 & 4118 &  2815 \\
          & {\sc average} & 0.9 &  $3612\pm1005$ &   $4743\pm832$ &   {\boldmath$4283\pm640$} & 6.69 & 2495 &  1594 \\[0.08cm]
\object WD~0612+177   & 30/11/02 & 1.3 &  $2416\pm1456$ & $-1148\pm1203$ &    $297\pm927$ & 0.32 & 4060 &  $-$2620 \\
               & 01/02/03 & 1.4 &    $86\pm1154$ &   $236\pm1171$ &    $156\pm821$ & 0.19 & 3742 &  2915 \\
          & {\sc average} & 0.9 &   $1132\pm920$ &   $-457\pm789$ &    $216\pm598$ & 0.36 & 2672 &  $-$1939 \\[0.08cm]
\object WD~0631+107   & 01/03/03 & 2.2 & $-1310\pm1785$ &  $-170\pm1815$ &  $-749\pm1272$ & 0.59 & $-$7300 &  $-$5890 \\
               & 03/03/03 & 2.1 &  $-790\pm1870$ &   $310\pm1775$ &  $-211\pm1287$ & 0.16 & $-$6630 &  4340 \\
          & {\sc average} & 1.2 &  $-990\pm1440$ &   $260\pm1090$ &   $-195\pm869$ & 0.22 & $-$4010 &  2630 \\[0.08cm]
\object WD~0839$-$327 & 29/11/02 & 0.7 &   $-313\pm325$ &    $402\pm261$ &    $121\pm203$ & 0.60 & $-$1008 &   761 \\[0.08cm]
\object WD~0859$-$039 & 03/02/03 & 1.5 &  $2083\pm1164$ &     $11\pm987$ &    $877\pm752$ & 1.17 & 4400 &  2727 \\
               & 25/02/03 & 1.2 &  $2183\pm1372$ &   $-401\pm911$ &    $389\pm758$ & 0.51 & 3234 &  $-$2222 \\
          & {\sc average} & 0.8 &   $1186\pm928$ &    $382\pm607$ &    $622\pm507$ & 1.23 & 2319 &  1511 \\[0.08cm]
\object WD~1042$-$690 & 28/01/03 & 1.3 &  $-719\pm2333$ & $-2850\pm2301$ & $-1799\pm1638$ & 1.10 & $-$3624 &  $-$3247 \\
               & 03/02/03 & 1.0 &  $1627\pm1464$ &  $-865\pm1163$ &     $99\pm910$ & 0.11 & 2963 &  $-$3560 \\
               & 24/02/03 & 0.9 & $-2374\pm1060$ &    $103\pm864$ &   $-885\pm669$ & 1.32 & $-$2764 &  1804 \\
          & {\sc average} & 0.6 &    $141\pm745$ &   $-406\pm620$ &   $-182\pm476$ & 0.38 & 1833 &  $-$1508 \\[0.08cm]
\object WD~1105$-$048 & 01/01/03 & 1.1 &  $-1153\pm632$ &     $55\pm807$ &   $-693\pm497$ & 1.39 & $-$2863 &  1599 \\
               & 29/01/03 & 1.1 & $-4686\pm1032$ &  $-3305\pm979$ &  {\boldmath $-$$3959\pm710$} & 5.58 & $-$2756 &  $-$2164 \\
          & {\sc average} & 0.8 &  $-2760\pm598$ & $-1337\pm675$  &  {\boldmath $-$$2134\pm447$} & 4.77 & $-$2156 &  $-$1538 \\[0.08cm]
\object WD~2359$-$434 & 04/11/02 & 1.0 & $-3003\pm1433$ & $-5719\pm1289$ &  {\boldmath $-$$4504\pm958$} & 4.70 & $-$2914 &  $-$2975 \\
               & 29/11/02 & 1.0 &  $-1905\pm702$ &  $-4224\pm796$ &  {\boldmath $-$$2919\pm526$} & 5.55 & $-$4880 &  $-$3907 \\
          & {\sc average} & 1.0 &  $-2066\pm546$ &  $-4738\pm667$ &  {\boldmath $-$$3138\pm422$} & 7.44 & $-$1785 &  $-$1532 \\ 
\hline
\end{tabular}
\end{table}