Date | 1647/8 (A.H. 1057) |
Maker | Muḥammad Muqīm al-Yazdī |
Place | Persia |
Material | Brass |
Inventory no. | 45747 |
Acquisition | Presented by Lewis Evans in 1924. |
Alidade
Appearance | Tip | Sights | Pinholes | Notches | Description |
---|---|---|---|---|---|
Double-ended, original. | Simple | Rigid | Single | Single |
Scales
Type | Range & Units | Numbered | Geometry | Location |
---|---|---|---|---|
Sine/Cosine | 1 - 60 1/60 of quadrant radius | Every 5 | Linear | Rule, right arm |