| Year | 1909 |
| Date | 18-Nov |
| Volume | 21 |
| Issue | 447 |
| Page | 490 |
| Category | General |
| Part | |
| Title | The Gyroscope and Its Applications. From Spinning Top to Mono Rail |
| Author | V.E.Johnson |
| Notes | Controlling contact planes, outer frame, ordinary & improved stilt gyroscopes, compound gyroscope, experimenting with stilt gyroscope, mono-rail model |