| Year | 1907 |
| Date | 07-Mar |
| Volume | 16 |
| Issue | 306 |
| Page | 228 |
| Category | Electrical |
| Part | |
| Title | Some Accurate Electrical Measuring Instruments |
| Author | V.W.Delves-Broughton |
| Notes | A Tangent Galvanometer. Section & plan of needle, sliding clip for rheostat, termonal block & connections, view, milliampere meter being calibrated, diagram of rheostat |