Artificial black glass horizon (lacking case and level), unsigned, made by an unknown English maker, 1815-1825. Consisting of a circular lacquered 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:
- 1981-1362
- Materials:
- copper (alloy) and glass
- Measurements:
-
overall: 23 mm x 105 mm x 105 mm, , .185kg
- credit:
- On loan from the Wellcome Trust