Speculum Mirror, 1850-1870

Made:
1850-1870 in Patricroft
maker:
James Hall Nasmyth
Flat metal speculum mirror, one of three

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Flat metal speculum mirror, one of three
Science Museum Group
© The Board of Trustees of the Science Museum

Flat metal speculum mirror, one of three, of 4 1/2-inch diameter for reflecting telescope, 1850-1870. May have been part of Nasmyth's reflective telescope.

Details

Category:
Astronomy
Object Number:
1897-14/2
Materials:
speculum (alloy of copper and tin with arsenic)
Measurements:
overall: 23 mm x x , 114 mm, 2.075kg
type:
component, mirror, flat mirror, metal mirror and astronomical instrument
credit:
Lieutenant General A de Gorloff