| Year | 1918 |
| Date | 25-Apr |
| Volume | 38 |
| Issue | 887 |
| Page | 247 |
| Category | General |
| Part | 1 |
| Title | Experiments with Tele-Control Systems |
| Author | V.E.Johnson |
| Notes | What the model worker requires, electric discharge experiment, the X-rays, actinic rays, showing the construction of a selenium cell, the Crookes radiometer (using to complete an electric circuit), light rays and selenium cells, heat rays and radiometers |