| Year | 1919 |
| Date | 12-Jun |
| Volume | 40 |
| Issue | 946 |
| Page | 464 |
| Category | General |
| Part | |
| Title | Some Experiments with a Compound Gyroscope |
| Author | V.E.Johnson |
| Notes | Experiments 1 to 10. A compound gyroscope, and weights, illustrating experiments nos. 5 & 6, showing effects of hanging weight on inner ring for various times |