| Year | 1924 |
| Date | 12-Jun |
| Volume | 50 |
| Issue | 1,207 |
| Page | 662 |
| Category | Electrical |
| Part | |
| Title | A Private Electric Supply System |
| Author | D.S.F.-R. |
| Notes | First method of wiring, switchboard, using two tappers in the same room, connections, the tapper, the sounder, relays, |