| Year | 1939 |
| Date | 17-Aug |
| Volume | 81 |
| Issue | 1,997 |
| Page | 207 |
| Category | Electrical |
| Part | |
| Title | The Transformer |
| Author | H.Chapman Pincher |
| Notes | Various types and how they work. Simple transformer (circular coil construction), simple transformer, three-phase transformer, star and delta type |