| Year | 1956 |
| Date | 27-Sep |
| Volume | 115 |
| Issue | 2,888 |
| Page | 440 |
| Category | Locomotive |
| Part | |
| Title | Locomotive valves and valve gears |
| Author | G.Woodcock |
| Notes | Resume of different types. Layout of Stephenson's gear, lap and lead, loco and launch links, Walschaert's gear, Americans liked it, shifting eccentric, checking clearance, locating the valves |