Little mountains below Mount Vesuvius, Kingdom of Naples, 1760.
© Science Museum / Science & Society Picture Library
Hand-coloured etching by Peter Fabris (active 1768-1779). Illustrated plate from William Hamilton's study of Italian volcanoes, 'Campi Phlegraei' (published Naples, 1776). The little mountains raised by an explosion of Vesuvius in 1760, as viewed from the cone of Vesuvius looking towards Capri. Diameter of (2) mountain is 800 Neopolitan palms (666 feet) and its height from the plain is 238 palms (198 feet). Based on letters to the Royal Society, Hamilton's book is a seminal work on the nature and effects of volcanic explosions.