| Year | 1998 |
| Date | 01-Jan |
| Volume | 180 |
| Issue | 4,058 |
| Page | 22 |
| Category | Steam |
| Part | 4 |
| Title | Radial Valve Gears Revisited |
| Author | Duncan Webster |
| Notes | Explores Sissons gear. Design methodology, worked example, result, computer programs, replacing the slide with a linkage |