| Year | 2002 |
| Date | 15-Nov |
| Volume | 189 |
| Issue | 4,182 |
| Page | 478 |
| Category | Horology |
| Part | |
| Title | Portable Universal Sundial |
| Author | David Wilcox |
| Notes | Armillary sphere. Skeletal sphere, pedestal, base, compass, levelling, use, magnetic variation, longitude, summer time, equation of time, conclusion |