- Subject
- Mathematical instruments
- Item type
- Object
- Primary inscriptions
- Unsigned
- Physical material
- Brass and silvered brass
- Object type
- Alidade
- Dimensions
- Height: 137mm Width: 437mm Depth: 48mm Weight: 1.2kg
- Inventory No
- 35095
Description
The alidade has a scale of equal parts on one bevelled edge. There are two folding sights, one with a cross-thread, the other with a slit. The meridian compass has a central N-S line and there is a slider on the outside of its box for locking the needle.
