(1779 – 1862)
Die Basalt-Gebilde in ihren Beziehungen zu normalen und abnormen Felsmassen.

Two text volumes 8° (220×135 mm) and one volume of atlas 4° (284×228 mm). XXII, 498; X, 536; 8 pp. and 20 lithographic plates of which 10 handcoloured. Contemporary boards of black paste paper, spine with gilt label.Corners and edges rubbed and scuffed. Text of atlas browned and dampstained, plates somewhat foxed. Stuttgart, E. Schweizerbart, 1832.
BIBLIOGRAPHY: Poggendorf I, 1427.
PROVENANCE: K. Hofmann, inscription on first flyleaves, dated 1864; Hugo Böckh (1874-1931), director of the Royal Hungarian Geological Institute in Budapest, with his bookplate; another bookplate pasted over.
Rare first edtion of the results of Leonhards travels in Auvergne Bohemia, and other volcanic areas. This work was a comprehensive study and conclusively proved the volcanic origin of basalt both with respect to its geological occurrence and to the appearance of the areas where basalt contacted other rocks. The book aided substantially in the victory of volcanism. The illustrations show a great number of intrusions, often putting five or six on a single plate. [369046].