| Year | 1951 |
| Date | 01-Nov |
| Volume | 105 |
| Issue | 2,632 |
| Page | 571 |
| Category | Petrol Engine Topics |
| Part | |
| Title | "New Engines for Old". How an Ancient Gas Engine was Improved, Modernised, and Given a New Lease of Life |
| Author | Edgar T.Westbury |
| Notes | A general view, a close-up of the valve chamber and ignition arrangements, view from cylinder-head end, a preliminary survey |