Siphon barometer in use, 1688.

Halite rock salt containing Haloarcula bacteria.

Polished lava from Mount Vesuvius, c 1770.

'Diagram of Natural Phenomena', c 1850.

Kingfisher, 1776.

'Glaciers', 1849.

Storks nesting on a roof, 1497.

Landscape and cloud study by Luke Howard, c 1808-1811.

Construction of the Bell Rock Lighthouse, 1808-1809.

The Tiger, 1607.

Afterglow an hour after official sunset time, Chelsea, London, 14 July 1886.

Northwest point of St Antonio, South Atlantic, 1828-1831.