| Year | 1921 |
| Date | 08-Dec |
| Volume | 45 |
| Issue | 1,076 |
| Page | 509 |
| Category | Steam |
| Part | |
| Title | Model Steam Engines |
| Author | W.W.Hollis |
| Notes | Some Reminiscences of the Last Half-Century. Using an ordinary gas tap for steam admission valve, construction of simple eccentric |