British Admiralty Hydrographer's tubular beam drawing compass
Beam compass, tubular, divided on silver to 1/20th inch; reads by vernier to 1/1000th inch; clamp and slow motion; numbered to 45 on brass.
Beam compass
Beam compass, tubular, divided on silver to 1/20th inch; reads by vernier to 1/1000th inch; clamp and slow motion; numbered to 45 on brass; extension tube numbered from 46 to 65, divided as above
Details
- Category:
- Mathematics
- Object Number:
- 1876-606
- credit:
- British Admiralty (Hydrographic Department)
Parts
Extension tube for Beam compass
Extension tube for Beam compass
- Object Number:
- 1876-606 Pt2
- type:
- tube
