Rule, Regula, Pointer and Alidade Images
Alidade Image:
| Date | 14th century |
| Place | North Africa |
| Material | Brass |
| Inventory no. | 53556 |
| Acquisition | Presented by Lewis Evans in 1924 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, original. | Simple | Rigid | Single | None | The rule is decorated by three lines engraved down its length.. |