Dark-Ground Illuminator Microscope Accessory, Late 19th Century

Subject: Microscopy
Item type: Object
Provenance: Purchased from Dr. Reginald S. Clay with his collection. Part of item 14 on typescript list.
Physical material: copper alloy; Glass; paint
Dimensions: Diameter: 52mm Height: 32mm Weight: 43g
Inventory No: 48560
Accession Number: 1944-1/part

Description

Copper alloy fitting with a removable central small paraboloid with a dark patch in the centre. Stored in black Japanned tin box.