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 in typescript list.
Physical material: copper alloy; Glass; paint
Dimensions: Diameter: 40mm Height: 20mm Weight: 24g
Inventory No: 95517
Accession Number: 1944-1/part

Description

Copper alloy fitting with paraboloid lens with central dark patch. Stored in black Japanned tin box.