| Year | 2023 |
| Date | 25-Aug |
| Volume | 231 |
| Issue | 4,724 |
| Page | 341 |
| Category | Steam |
| Part | 7 |
| Title | Radial Valve Gears Again |
| Author | Duncan Webster |
| Notes | Joy Valve Gear. Sheds light on what is often seen as a complex subject. Introduction, principle of operation, design, results, outside Joy, offset top joint, references |