| Year | 2021 |
| Date | 18-Dec |
| Volume | 226 |
| Issue | 4,654 |
| Page | 17 |
| Category | Horology |
| Part | |
| Title | Worm and Wheel Gearing in Clockwork Mechanisms |
| Author | John Moorhouse |
| Notes | Looks at worm gears commonly used in clocks and automata. Key measurements of the endless, key measurements of the drive wheels, data from small musical boxes, Griesbaum bird box, references |