| Year | 1909 |
| Date | 22-Jul |
| Volume | 21 |
| Issue | 430 |
| Page | 77 |
| Category | Horology |
| Part | |
| Title | About Electric Clocks |
| Author | |
| Notes | Pendulum switch, dial movement, F.Hope-Jones, diagram of circuit of electrical impulse dials: battery & all instruments joined up in simple series, the Synchronome Company |