Speculum Mirror, 1850-1870

PART OF:: Four primary metal speculum metal mirrors

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:: 1897-14/1

Materials:: speculum (alloy of copper and tin with arsenic)

Measurements:: overall: 24 mm x x , 114 mm, 2.015kg

type:: component, mirror, flat mirror, metal mirror and astronomical instrument

credit:: Lieutenant General A de Gorloff

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Speculum Mirror, 1850-1870

Details

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