| Year | 1939 |
| Date | 29-Jun |
| Volume | 80 |
| Issue | 1,990 |
| Page | 769 |
| Category | Electrical |
| Part | |
| Title | Simple Motor |
| Author | R.F.M.Woodforde |
| Notes | How to make a Model Thermo-Pile Driven Electro-Motor without a lathe. The motor, Front and end elevations and plan, arrangement of brush and contact maker, alternative method of making the magnet, the thermo-pile, arrangement of elements, gas ring |