Whirling speculum mirror, used for an artificial horizon
Whirling speculum mirror, by George Adams, London, England, 1762
- Measurements:
-
overall: 40 mm x 90 mm diameter, 0.64 kg
- Materials:
- speculum (alloy of copper and tin) and brass (copper, zinc alloy)
- Object Number:
- 1927-1123 Pt1
- type:
- speculum
- Image ©
- The Board of Trustees of the Science Museum