| Year | 1991 |
| Date | 17-May |
| Volume | 166 |
| Issue | 3,897 |
| Page | 558 |
| Category | Horology |
| Part | 5 |
| Title | The Aquarius Clock |
| Author | John Orange |
| Notes | Describes his skeleton clock and details some of the thinking which led to its design. Testing and possible causes of trouble, postscript |