| Year | 1918 |
| Date | 07-Mar |
| Volume | 38 |
| Issue | 880 |
| Page | 147 |
| Category | Electrical |
| Part | |
| Title | Electric Motor Sparking Troubles |
| Author | R.Robert |
| Notes | The diameter of commutation with no load, the distartion arising from load, proper method of connections for an inter-pole motor |