| Year | 1989 |
| Date | 03-Nov |
| Volume | 163 |
| Issue | 3,860 |
| Page | 558 |
| Category | Horology |
| Part | 1 |
| Title | Phoeboscope |
| Author | H.Christopher H.Armstead |
| Notes | Describes the background, construction and uses of his unique sundial. Another alternative, a dormant design, design features |