| Year | 1907 |
| Date | 30-May |
| Volume | 16 |
| Issue | 318 |
| Page | 516 |
| Category | Electronic |
| Part | |
| Title | A Portable Wireless Telegraphy Installation |
| Author | T.J.Northy |
| Notes | The transmitting apparatus, the coil battery, the receiving apparatus, the filings, the relay, bell and coherer, the receiving batteries |