Ancient Chinese plough.

Persian equal-arm balance, c 1800-1810.

Candle making machine, English, c 1888.

Vesels for demonstrating the hydrostatic paradox, 1752.

Chinese scales, 19th century.

Railway with cast iron plate rails from Coalbrookdale, 1767.

Balance with scale pans, c 1370-1350 BC.

Automatic pan balance, 1964.

Ancient Roman steelyard, from Pompeii, Italy, 79 AD.

A water cooled mould from a continuous casting machine, c 1970.

Kennard & Sons, Iron Works, Falkirk, Scotland, c 1855.

Back saw by Sorby, Sheffield, England 1820-1890.