Mount Vesuvius erupting as seen from the Mole of Naples, Kingdom of Naples, 20 October 1767.
© Science Museum / Science & Society Picture Library
Hand-coloured etching by Peter Fabris (active 1768-1779) and taken from William Hamilton's (1730-1803) study of Italian volcanoes, 'Campi Phlegraei' (published in Naples, 1776). The lighthouse on the Mole of Naples can be seen in the foreground. Based on letters to the Royal Society, 'Campi Phlegraei' was a more precise study of volcanoes than had previously existed, illustrating Hamilton's claim that they are creative rather than destructive natural forces.