Two thermometers, 1835-1875.

Thermometers, 1688.

Six's self-registering thermometer by Cary, 18th century.

Six's self-registering thermometer, 18th century.

Mercury, 2006.

Transit of Mercury, 2003.

Mercury in the morning sky, 2006.

Thermometers and hygrometers, 1744.

Barometer, thermometer and hygrometer combined, 1739.

'Digitherm' digital electronic thermometer with probe, c 1970s.

Zeal fertility thermometer, 2000.

Motion of Venus or Mercury magic lantern slide, 19th century.