| Year | 1909 |
| Date | 14-Oct |
| Volume | 21 |
| Issue | 442 |
| Page | 364 |
| Category | General |
| Part | |
| Title | The Gyroscope and Its Applications: From Spinning Top to Mono Rail |
| Author | V.E.Johnson |
| Notes | Gyroscopes with pulleys, centre of gravity below point of support, see 71 1738 210 |