Adler zinc mine and ore-washing works, Uckerath, Germany, 1855.

Steinbruck zinc ore-washing works, Bensberg, Germany, 1855.

Ordinary copper ore from Alderly Edge, Cheshire.

Zinc works at Angleur, Belgium, 1855.

Calcinating heaps of copper ore, 1734.

Asayer's laboratory, 1574.

Zinc works, Flone, Belgium, 1855.

Zinc works at Mulheim an der Ruhr, Germany, 1855.

'New Ore Discharging Plant at General Terminus Quay, Glasgow', 1948-1965.

Miners, Germany, c 1851.

Early form of primitive railway, c 1550.

Indian No 6 stand at the Great Exhibition, Crystal Palace, 1851.