| Year | 1925 |
| Date | 06-Aug |
| Volume | 53 |
| Issue | 1,267 |
| Page | 179 |
| Category | Steam |
| Part | |
| Title | Piston Valves or Slide Valves for Model Work |
| Author | Henry Greenly |
| Notes | Diagram of loads on slide valves of different scales, sections of 1 1/2" scale piston valve cylinders with auto relief valves |