| Year | 1940 |
| Date | 11-Apr |
| Volume | 82 |
| Issue | 2,031 |
| Page | 378 |
| Category | General |
| Part | |
| Title | The Search for Perpetual Motion |
| Author | Waring S.Sholl |
| Notes | Falling weight system, spring reaction type, self-sustaining syphon, early electric "motor", also a mechanical absurdity |