F3238

Thallium ingot Long Caption: Ingot of thallium. Thallium is a poisonous metallic element that is also mildly radioactive. It occurs naturally in soils and is used in various alloys and in certain industrial and manufacturing processes. Credit line: © National Maritime Museum, Greenwich, London, Herschel Collection Object: AST1029.43 Artist: unknown Date: unknown Medium: metal Size: 3 mm x 65 mm x 10 mm Click here to buy a bespoke print of this image.