Practical observations on the mechanical structure, mode of formation, the repletion or filling up, and the intersection and relative age of mineral veins with the application of several new theoretical principles to the art of mining - Leithart, John (J. Weale, 1838)
Errata slip inserted. - Goldsmiths'-Kress no. 30333. - OCLC, 17819476. - Reproduction of original from Goldsmiths' Library, University of London