| Year | 1989 |
| Date | 06-Jan |
| Volume | 162 |
| Issue | 3,840 |
| Page | 38 |
| Category | Keith's Column |
| Part | 7 |
| Title | How the Darn Thing Works. A light-hearted, but useful, look at the Steam Engine |
| Author | Keith Wilson |
| Notes | Steam cut-off's explained, ideas vary on notching-up, steam compounding |