| Year | 1932 |
| Date | 07-Jan |
| Volume | 66 |
| Issue | 1,600 |
| Page | 13 |
| Category | Electrical |
| Part | |
| Title | Dynamo and Motor Brushes |
| Author | A.H.A. |
| Notes | Some notes on their selection and use. Solid metal brush, copper gauze, strip copper wrapped in gauze, alteration of commutation axis with change of load, change of commutating position due to armature reaction, suppression of sparking by interpoles, carbon brush with fixed position at all loads, table of carbon brushes with their properties and applications |