Reference numberMOB/106
TitleSpeculum mirrors
ArtistElder, Brad
DescriptionTwo modern mirrors of speculum metal (67% copper, 33% tin) of the type used by Sir Isaac Newton in his reflecting telescope, made using an open-face mould. Housed in a wooden presentation box with a label on the lid inscribed 'Earth Shaker Foundry'
Extent2 artefacts
MaterialsCopper, tin
Dimensions50.8 mm (d)
Access statusOpen
ProvenanceDonated to the Royal Society by Brad Elder, Earth Shaker Foundry, Nebraska, 2018
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