Optical parts of Lassell's telescope: plane specul

Made:
1840-1850 in Liverpool
maker:
William Lassell

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© The Board of Trustees of the Science Museum

Optical parts of Lassell's telescope: plane speculum on arm for 9-in; speculum for Newtonian finder in tin case 4 eyepices

Details

Category:
Astronomy
Object Number:
1921-819/2
type:
metal mirrors
credit:
Mr Thomas H. Court