Hand-coloured etching by Peter Fabris (active 1768-1779). Illustrated plate from William Hamilton's study of Italian volcanoes, 'Campi Phlegraei' (published in Naples, 1776). Above the town of Puzzoli (now known as Pozzuoli), showing (3) the Temple of Serapis, (6) Monte Nuovo, (4) the remains of 'Caligula's bridge' and (7) 'Nero's bath' in which, according to Hamilton, the water was so hot as to boil an egg in minutes. Based on letters to the Royal Society, Hamilton's book is a seminal work on the nature and effects of volcanic explosions.
© Science Museum / Science & Society Picture Library