Speculum Metal Mirror, 1840-60
1840-1860
Four speculum metal secondary mirrors thought to have been made by James Nasmyth
- Made:
- 1850-1870 in Patricroft
- maker:
- James Hall Nasmyth
Four speculum metal secondary mirrors thought to have been made by James Nasmyth. Donated by Lieutent General A de Gorloff who lived at Nasmyth's former home of Hammerfield near Penshurst in Kent.
Details
- Category:
- Astronomy
- Object Number:
- 1897-15
- Materials:
- speculum (alloy of copper and tin), pitch and brass (copper, zinc alloy)
- Measurements:
-
see parts
- type:
- components, metal mirrors and astronomical instruments
- credit:
- Lieutenant General A de Gorloff
Related Objects
Film positive (9 7/8" x 7 3/4") Nebula N.G.C. 4594
Film positive (9 7/8" x 7 3/4") nebula N.G.C. 5866
Tokens used for branding equipment 'H.N.Irving'
Profile gauge with concave profile
Brass disc with diagram of inner Solar System showing Thomas Wright's "construction" of the Great Comet of 1744
