| Year | 1931 |
| Date | 13-Aug |
| Volume | 65 |
| Issue | 1,579 |
| Page | 147 |
| Category | Electrical |
| Part | |
| Title | A Miniature Electric Motor and a Mantelpiece Electric Clock |
| Author | A.R.Ingram |
| Notes | Foreword, constructing a small electric motor, weight 1 1/2 ounces, the commutator, note of trial made by the "M.E." staff, armature, field coils, electric impulse clock, mantelpiece clock |