| Year | 1915 |
| Date | 11-Mar |
| Volume | 32 |
| Issue | 724 |
| Page | 195 |
| Category | Electrical |
| Part | |
| Title | A 20-Cell Electro-Medical Constant-Current Battery |
| Author | G.Gentry |
| Notes | The Rheostat, showing details of graphite rheostat, diagram of rheostat & details of bridge runner |