| Year | 1999 |
| Date | 15-Jan |
| Volume | 182 |
| Issue | 4,085 |
| Page | 71 |
| Category | Correction |
| Part | 4 |
| Title | A 3/4 Second Pendulum Electric Clock (C.R.Jones) |
| Author | John Wilding |
| Notes | Details the pendulum rod and associated components. Forming the crank, hooking pin, rating nut, references, Peatol machine vice, materials |