| Year | 1914 |
| Date | 27-Aug |
| Volume | 31 |
| Issue | 696 |
| Page | 200 |
| Category | Electronic |
| Part | |
| Title | Recent X-Ray Apparatus |
| Author | |
| Notes | "Coolidge" X-ray tube; the anode is a solid mass of tungsten, diagram of connections, Messrs Harry W.Cox & Co.'s alternating current interrupter for spark coils |