Specimens of a curious volcanic matter taken from a hollow road leading from Pisciarelli to the Solfaterra, Plate XXXXIII, from 'Campi Phlegraei: Observations on the Volcanoes of the Two Sicilies', by Sir William Hamilton (1730-1803), published 1776 (hand coloured engraving).
Pixel Dimensions (W x H) : 5221x2989
File Size : 45,720kb