Primary metal speculum mirror with central hole

Made:
1840-1850 in Patricroft
maker:
James Hall Nasmyth
Primary metal speculum mirror with central hole

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Primary metal speculum mirror with central hole
Science Museum Group
© The Board of Trustees of the Science Museum

Primary metal speculum mirror with central hole, 8 5/8-inch diameter, for reflecting telescope (see note).

Details

Category:
Astronomy
Object Number:
1897-14/4
Materials:
speculum metal
Measurements:
overall: 20 x 220 mm
type:
components, concave mirrors, metal mirrors and astronomical instruments
credit:
Lieutenant General A de Gorloff