| Year | 1950 |
| Date | 23-Feb |
| Volume | 102 |
| Issue | 2,544 |
| Page | 239 |
| Category | Steam |
| Part | |
| Title | Utility Steam Engines |
| Author | Edgar T.Westbury |
| Notes | A "Humming Bird" criticism (from C.Blackstaffe), variable cam timing for poppet valves (H.Bristow), all-fabricated twin oscillating engine & a "Trojan" type engine by A.G.Seels, steam enthusiasts, advance! Utility steam engine castings |