Speculum Metal Mirror, 1840-60
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Speculum metal mirror thought to have been made by James Nasmyth, one of four, a flat oval shaped secondary mirror for use at the Newtonian focus of the reflecting telescope, 1840-60.
Details
- Category:
- Astronomy
- Object Number:
- 1897-15/1
- Materials:
- speculum (bronze alloy with arsenic)
- Measurements:
-
overall: 10 mm x 77 mm x 49 mm, , .225kg
- type:
- component and metal mirror
- credit:
- Lieutenant General A de Gorloff
