Set of lithotomy instruments in a fishskin case, c 1775.

Set of lithotomy instruments in a fishskin case, c 1775.

Lithotomy set, English, 1780-1820.

'Uni-curve' interchangeable curve-matched bead thermistor, 1994.

'Uni-curve' interchangeable curve-matched bead resistor, 1994.

The curved cartoon screen in the Pattern Pod, Science Museum, London 2000.

Bronze axehead, Ecuador.

Horseshoe Curve, 1999.

Horseshoe Curve, 1999.

Mercury, 2006.

'A Mill at Colebrook Dale', Shropshire, 1814.

Mercury in the morning sky, 2006.