| Year | 1931 |
| Date | 13-Aug |
| Volume | 65 |
| Issue | 1,579 |
| Page | 160 |
| Category | Locomotive |
| Part | |
| Title | Multi-purpose Steam Cylinders. Principally for Outside Cylinder Model Locomotives |
| Author | Geo. Gentry |
| Notes | The stuffing box flanges, surfaces machined on the covers, interchanging pattern to adapt cylinder for valve on top, some points in pattern construction, the piston and rod |