Improved sketching instrument
Improved sketching instrument, camera lucida type, by Abraham Abraham, Liverpool, 1840-1850. Blue glass filter
- Measurements:
-
, ,
- Materials:
- metal (unknown) , copper (alloy) , brass (copper, zinc alloy) and glass
- Object Number:
- 1928-937 Pt1
- Image ©
- The Board of Trustees of the Science Museum