| Year | 1906 |
| Date | 09-Aug |
| Volume | 15 |
| Issue | 276 |
| Page | 142 |
| Category | Queries and Replies |
| Part | |
| Title | 16254. Speed of Shafting for Driving Small Dynamo; Charging Small Cells |
| Author | W.H. |
| Notes | Position of resistance in charging circuit, arrangement of drawing pulleys |