Iron, 1869.

Rusian lodestone, 1777 and coil used by Faraday, 1831.

Iron and manganese, 1869.

Lodestone, c 1970s.

Iron Oxide Dendrites

Two links of anchor chain forged from puddled iron, 1780-1869.

Set of 'artificial' magnets, c 1762.

Sea green vase, c 1935.

Zollverein stand at the Great Exhibition, Crystal Palace, London, 1851.

Steel/aluminium silicon oxide. Light microg

Titanium oxide beads. Light micrograph in

Uranium oxide supplied by Harrington Bros.