[doctordew]

<table>
  <tr>
    <th id="header1" scope="col">header 1</th>
    <th scope="col">header 2</th>
    <th scope="col">header 3</th>
  </tr>
  <tr>
    <td>cell 1</td>
    <td>cell 2</td>
    <td>cell 3</td>
  </tr>
  …
</table>

#header1 {white-space: nowrap;}

Thank VipStephan for that post on another forum.