Hot-air balloons over countryside, 1785-1795.

Combined circular and spiral slide rule, in a wooden frame, 1882.

Bottle, Islamic, 901-1200.

Mariner's compass, Chinese, 1830-1920.

Bottle, Islamic, 901-1200.

Wooden counting board, European, 1701-1800.

Astronomer using a wooden telescope, 1673.

Circular slide rule, c 1870.

A balloon in a rural landscape, with river and horsemen, late 18th century.

A selection of 'ballooniana' objects, late 18th century.

Absinthe Terminus wrapper, c 1900.

Circular slide rule, 1660-1680.