Insulated cylinder for cryogenic work

Before the London chemist James Dewar (1842–1923) invented a specialized vessel for the storage of liquefied gases in 1892, researchers used various methods of thermal insulation to prevent the violent evaporation of liquefied gases. ca. 1900, Kraków Jagiellonian University Museum Collegium Maius Inventory number: 4634; 639/V https://muzea.malopolska.pl/en/objects-list/2818 Source: Objaverse 1.0 / Sketchfab