| Year | 1918 |
| Date | 02-May |
| Volume | 38 |
| Issue | 888 |
| Page | 261 |
| Category | General |
| Part | 1 |
| Title | Experiments with Tele-Control Systems |
| Author | V.E.Johnson |
| Notes | Heat rays and thermoscopes, mercury receiver for heat rays, electric rays or waves, sound waves (receiver for), mercury receiver for sound waves, appliance for drawing a parabola, aerial vortex rings, the generation of a parabola, parabolic mirrors, a Gyroscope, how to keep the direction of the receiver constant, accidentals |