| Year | 1948 |
| Date | 25-Nov |
| Volume | 99 |
| Issue | 2,479 |
| Page | 568 |
| Category | Steam |
| Part | |
| Title | Slide - and Piston-Valves |
| Author | "Battiwallah" |
| Notes | The cut-off, steam port width, the port opening for steam admission, the point of exhaust opening, the angular difference between the piston and valve strokes, stroke and valve dimensions, D-slide valve, piston valve |