| Year | 1953 |
| Date | 17-Dec |
| Volume | 109 |
| Issue | 2,743 |
| Page | 715 |
| Category | More Utility Steam Engines |
| Part | |
| Title | The "Cygnet". A Single-Acting Horizontal Twin |
| Author | Edgar T.Westbury |
| Notes | Hydrocarbon Vapour Engines. A Naphtha Vapour launch engine by the Gas Engine & Power Co. New York, a naphtha vapour pumping engine, alcohol vapour engines, the Alco Vapour engine, view showing rotary valve and differential driving gears |