Artificial black glass horizon (lacking case and level), unsigned, made by an unknown English maker, 1875-1885. Consisting of a circular anodized brass base with three levelling feet and covered with a blackened glass plate serving as a mirror.
Details
- Category:
- Surveying
- Collection:
- Sir Henry Wellcome's Museum Collection
- Object Number:
- 1981-1363
- Materials:
- glass and brass (copper, zinc alloy)
- credit:
- On loan from the Wellcome Trust