| Year | 1908 |
| Date | 05-Nov |
| Volume | 19 |
| Issue | 393 |
| Page | 433 |
| Category | Electronic |
| Part | |
| Title | Photographs of Electric Sparks |
| Author | William L.Bemrose |
| Notes | Photograph of positive discharge, photo of discharge between brass ring & metal plate, photograph of negative discharge |