| Year | 1949 |
| Date | 01-Dec |
| Volume | 101 |
| Issue | 2,532 |
| Page | 701 |
| Category | Steam |
| Part | |
| Title | Utility Steam Engines (Humming Bird) |
| Author | Edgar T.Westbury |
| Notes | Steamchest (piston-valve type), piston valve, "breathing" and lubrication, lubricating and ventilating arrangements for the "Humming Bird", correction |