| Year | 1925 |
| Date | 22-Oct |
| Volume | 53 |
| Issue | 1,278 |
| Page | 534 |
| Category | Electronic |
| Part | |
| Title | Earth Waves |
| Author | Capt. Quenton C.A.Craufurd |
| Notes | The function of the spark, the coherer and insulation, working without aerials, the earth as conductor or dielectric? |