| Year | 2009 |
| Date | 27-Mar |
| Volume | 202 |
| Issue | 4,348 |
| Page | 384 |
| Category | Horology |
| Part | 2 |
| Title | Equatorial Sundial |
| Author | Roger Bunce |
| Notes | Describes how to design and make the equation of time cam. Checking equations, practical design, mirror image, polar plot, completing the design, making the cam, testing the cam, references, the British Sundial Society |