| Year | 1910 |
| Date | 08-Dec |
| Volume | 23 |
| Issue | 502 |
| Page | 538 |
| Category | Electrical |
| Part | |
| Title | Experiments on Electric Oscillations and Waves |
| Author | R.P.Howgrave-Graham |
| Notes | Air-core transformer with handle & on stand, picking up energy electrostatically by means of air-core transformer held in the hand |