Mineralogie des volcans - Ou, description de toutes les substances produites ou rejetees par les feux souterrains

Abandoning a promising legal career, Barthélemy Faujas de Saint-Fond (1741–1819) chose instead to pursue his love of natural history. This work, published in 1784, provides detailed observations on a wide range of volcanic rocks, describing major identifying features and specifying locations of each variety.