| Year | 1914 |
| Date | 10-Sep |
| Volume | 31 |
| Issue | 698 |
| Page | 256 |
| Category | Workshop Difficulties |
| Part | |
| Title | Making a Commutator for 500-watt Slow-Speed Dynamo |
| Author | Angus C.Rennie |
| Notes | Awarded a prize in our Workshop Difficulties Competition. Showing method of setting up commutator castnig |