| Year | 1931 |
| Date | 29-Oct |
| Volume | 65 |
| Issue | 1,590 |
| Page | 419 |
| Category | Locomotive |
| Part | |
| Title | Piston Valve Cylinders and Liners Once Again |
| Author | Henry Greenly |
| Notes | Design for single-liner double-ported piston valve cylinders with screwed-on exhaust caps for continental type engine, Alfred May's piston valve cylinders, alternative exhaust arrangement, alternative exhausts end cap design |