| Year | 1952 |
| Date | 24-Jul |
| Volume | 107 |
| Issue | 2,670 |
| Page | 110 |
| Category | Locomotive |
| Part | |
| Title | Locomotive Valve Timing |
| Author | C.M.Keiller |
| Notes | Curve of simple harmonic motion, combined harmonic motions, the Zeuner valve diagram, various combinations of diagrams |