split object-glass micrometer, 1760-1780
Split object-glass micrometer by Dollond, London, 1760-1780
- Measurements:
-
overall: 120 mm x 330 mm x 90 mm, 1.15 kg
- Materials:
- brass (copper, zinc alloy) , glass and steel (metal)
- Object Number:
- 1927-1782 Pt1
- type:
- filar micrometer
- Image ©
- The Board of Trustees of the Science Museum