Physica subterranea profundam subterraneorum genesin, è principiis hucusque ignotis, ostendens. Opus sine pari, primum hactenus & princeps, editio novissima. Praefatione utili praemissa, indice locupletissimo adornato, sensumque & rerum distinctionibus, libro tersius &curatius edendo, operam navavit & Specimen Beccherianum, fundamentorum, documentorum, experimentorum, subjunxit Georg. Ernestus Stahl.

Folio (350×236 mm). [4] ff. including frontispiece and blank, 979 [13] pp. With a fine engraved title by Giovanni Battista Coriolano and ca 1200 woodcuts in the text.Contemporary vellum with a blindpressed arabesque centre-piece on covers, spine on raised bands with later lettering piece of red morocco. Head of spine repaired, front fly-leaf frayed at gutter, else a fine and spotless copy. (Bologna, Giovanni Battista Ferroni, 1648), [36]; [8], 304, [16] pp. With an engraved frontispiece. Contemporary vellum over wooden boards, spine covered with grey paper, one clasp (of two). Hinges starting to crack. Slightly browned throughout as usual, due to minor paper quality. Leipzig, Johann Ludwig Gleditsch, 1703.
BIBLIOGRAPHY: Dünnhaupt 16.I.4; Ferguson I, 88-89; Ferchl 30.
PROVENANCE: Collegium St. Georgi in Augsburg and Königl. Kreisbibliothek in Augsburg, inscription resp. stamp on title page.
First published in 1669, this is the completely revised and enlarged edition with the 3 supplements and Stahl‘s Specimen Beccherianum, in which Becher‘s phlogiston theory is explained and stated. All later prints follow Stahl‘s edition. [369007].