| Year | 1914 |
| Date | 16-Jul |
| Volume | 31 |
| Issue | 690 |
| Page | 57 |
| Category | Electronic |
| Part | |
| Title | Wimshursts and Wireless |
| Author | V.E.Johnson |
| Notes | Introductory, some of the apparatus used by the writer in his experiments, the long spark fallacy, speeding up the spark, general view of high-speed two-disc Wimshurst, the first designed device to control the spark, the fallacy of the big disc machine, showing one of the oscillating brushes etc. in normal position, controlling the spark, showing position of brushes on depressing key, general view of controlling lever of tapping key |