| Year | 1915 |
| Date | 11-Feb |
| Volume | 32 |
| Issue | 720 |
| Page | 111 |
| Category | Electrical |
| Part | |
| Title | A 20-Cell Electro-Medical Constant-Current Battery |
| Author | G.Gentry |
| Notes | Plan of switchboard with diagram of cell connections, view of cells in case & underside of switchboard of 20-cell battery |