| Year | 1986 |
| Date | 07-Feb |
| Volume | 156 |
| Issue | 3,770 |
| Page | 140 |
| Category | "Countryman's Steam" |
| Part | 4 |
| Title | The Dairy Engine. a 2 in. scale model of a self-contained steam plant |
| Author | John Haining |
| Notes | Governor and governor valve, drilling the valve chest cover |