| Year | 1941 |
| Date | 15-May |
| Volume | 84 |
| Issue | 2,088 |
| Page | 391 |
| Category | Horology |
| Part | |
| Title | The Centenary of the Electric Clock |
| Author | Waring S.Sholl |
| Notes | Workshop of Alexander Bain, 1841 - Bain's first - contact - pendulum, 1843 - Bain's second - electric- moving coil pendulum with "earth" battery, 1843 - Bain's third pendulum; fixed coils, permanent magnet "Bob", 1842 - Hipp's pallet and notch system |