Hand speculum grinding/polishing machine

Made:
1780-1820 in Berkshire and Slough
maker:
William Herschel

Hand speculum grinding/polishing machine constructed and used by Sir W. Herschel for polishing specula of 6-inch aperture.

Details

Category:
Astronomy
Object Number:
1876-1019
Materials:
iron, brass, wood and graphite
Measurements:
overall: 151 mm x 780 mm x 390 mm,
type:
machines and polishing machines
credit:
Mr John Herschel-Shorland

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