| Year | 1990 |
| Date | 18-May |
| Volume | 164 |
| Issue | 3,873 |
| Page | 610 |
| Category | Beam Engine |
| Part | 2 |
| Title | Non Rotative Beam Engines |
| Author | Roy Simmons |
| Notes | The historical development and their operation reviewed. The operating cycle, valves, valve gear, double beat valve from the 90 in. beam engine at Kew Bridge Engines, Crofton No. 1 engine |