Inside the crater of Monte Nuovo, Kingdom of Naples, c 1770.
© Science Museum / Science & Society Picture Library
Hand-coloured etching by Peter Fabris (active 1768-1779), after his own drawing. Illustrated plate from William Hamilton's study of Italian volcanoes, 'Campi Phlegraei' (published in Naples, 1776). The bottom of the crater of Monte Nuovo (New Mountain), near the town of Puzzoli in southern Italy. Said to have formed in forty eight hours in 1538, the mountain is composed of a light yellow-coloured tufa and loose volcanic matter. This tufa was formed by water having mixed with volcanic cinders at the time of eruption.