| Year | 1907 |
| Date | 13-Jun |
| Volume | 16 |
| Issue | 320 |
| Page | 568 |
| Category | Electrical |
| Part | |
| Title | Some Accurate Electrical Measuring Instruments |
| Author | V.W.Delves-Broughton |
| Notes | Volt- and Ampere-Meters. Section through coil, front view, hardened steel centres, action with copper tube & needle points, connection of resistance coil, fibre bridge piece |