F3240

Metal ingots Long Caption: Three triangular shaped metal alloy ingots. These ingots of metal were presumably used by John FW Herschel and/ or his children (it may even have been used by John FW with his children) as the raw materials for experiments. They may even date from a generation earlier and relate to William Herschel and his experiments to find the perfect recipe for the speculum metal he used for his telescope mirrors. Credit line: © National Maritime Museum, Greenwich, London, Herschel Collection Object: AST1029.37 Artist: unknown Date: unknown Medium: metal Size: largest:: 14 mm x 145 mm x 25 mm Click here to buy a bespoke print of this image.