Rule, Regula, Pointer and Alidade Images
Alidade Image:
| Date | ca. 1700 |
| Maker | Khalīl Muḥammad ibn Ḥasan ‘Alī |
| Place | Iṣfahān |
| Material | Brass |
| Inventory no. | 35313 |
| Acquisition | Presented by J. A. Billmeir in 1957 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, replacement. | Decorative | Rigid | Double | None | This is a later addition to the instrument and bears no markings or scales. |