Kurze und deutliche Vorstellung dr Edlen Probier-

Kurze und deutliche Vorstellung dr Edlen Probier-Kunst...,second edition, engraved frontispiece of an assayer in his workshop, title in red and black, Gothic letter, engraved bookplate of Christo[pher] Froschmayr E[dler] v[on] Scheibenhof pasted onto verso of title, lightly browned, hinges splitting, book-label of J.A.Freilich, "very scarce" in faint red biro on front free endpaper, contemporary vellum, yapp edges, very slightly stained, [Ferguson I p.487], 12mo, Nuremberg, Johann Friederich Rüdiger, 1718.

***Rare treatise on the assaying of metallic ores with detailed accounts of the reagents, apparatus, furnaces etc. necessary and a glossary of technical terms. Froschmayr was either a jeweller or assayer and owned a portfolio of watercolour drawings of alchemical and assaying apparatus (Wellcome Ms.897)..