| Year | 1910 |
| Date | 03-Nov |
| Volume | 23 |
| Issue | 497 |
| Page | 414 |
| Category | Electronic |
| Part | |
| Title | The Electrophone |
| Author | F.Rudolph Griffiths |
| Notes | Transmitter, difference between standard & electrophone transmitter, switch & induction coil at theatre end, standard circuits, model transmitter & induction coil, special circuit for room to room |