Speculum Metal Mirror, 1850-70
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Science Museum Group
© The Board of Trustees of the Science Museum
Speculum metal mirror, one of four, a flat circular tertiary mirror for use at the Nasmyth focus of Nasmyth's 20-inch reflecting telescope (?), Salford, England, 1850-70.
Details
- Category:
- Astronomy
- Object Number:
- 1897-15/2
- Materials:
- speculum (bronze alloy with arsenic)
- Measurements:
-
overall: 10 mm x x , 49 mm, .165kg
- type:
- components, metal mirrors and astronomical instruments
- credit:
- Lieutenant General A de Gorloff
