| Year | 2002 |
| Date | 06-Sep |
| Volume | 189 |
| Issue | 4,177 |
| Page | 217 |
| Category | Correction |
| Part | 5 |
| Title | A Ferris Wheel Clock |
| Author | Richard Stephen |
| Notes | Wheels and pinions, Ferris wheel. Case hardening the pinions, making the polishing hob, polishing the teeth, crossing out the wheels, Ferris wheel, making the Ferris wheel |