Lunar globe with mechanical stand, 1797.

Nasmyth's 20 inch reflecting telescope, 1850-52.

'The globe or sphere in its three different positions', mid 18th century.

Spectacles with photochromatic lenses, 1970-1972.

Arabic celestial globe and frame, 5 3/4-inch diameter, bronze marked with silver studs, on wooden stand (RAS No.90), unsigned, 1601-1700.

Arabic celestial globe and frame, 5 3/4-inch diameter, bronze marked with silver studs, on wooden stand (RAS No.90), unsigned, 1601-1700.

Mechanised glass celestial globe, 1742-1750.

Newtonian reflecting telescope, 1783-85.

Newtonian reflecting telescope, 1783-85.

Newtonian reflecting telescope, 1783-85.

Wooden model to illustrate the causes of eclipses, 1860s.

Wooden model to illustrate the causes of eclipses, 1867.