Melting cast iron in a furnace by charging it with charcoal, 1734.

Stresed Pure Copper. Light micrograph.

Joannes Baptiste van Helmont and Franciscus Mercurius van Helmont, 17th century.

Glas cullet.

MCC copper aluminium / alumina fibres. Ligh

Copper aluminium (11.8%) annealed and etche

Lump of blue frit, c 1550 BC.

Blue flint glas cullet, 1968.

Slab of yellow cast glas, 1968.

Walter 109-509A rocket engine, c 1943.

'Railway Gallery under the canal near Holsden Green Middlesex' , 1837.

Sudanese iron spear, 1930s.