| Year | 1952 |
| Date | 07-Aug |
| Volume | 107 |
| Issue | 2,672 |
| Page | 167 |
| Category | Smoke Rings |
| Part | |
| Title | Our Cover Picture (Double Acting Compound Beam Engine c1860) |
| Author | |
| Notes | Made by Thomas Horn c1860, patent by Jonathan Hornblower, from an exhibit in the Science Museum |