Becher, Johann Joachim; Experimentum Chymicum Novum, quo artificalis. & instantamea metallorum generatio. & Transmutatio....Loco supplementi in physicam suam subterraneum. & Oedipus Chymicus. & Trifolium Becherianum Hollandicum.. Jm Jahr & Frankfurt 1680 & 1679. Octavo, pp. 192, tp, & pp. 175, register, pp. 15. & pp. 156, register, pp. 4, & pp. 54.

In contemporary vellum over boards with inked titles , light scuffing to binding, minor browning to some text edges. The work is cased in a later vellum covered slipcase, very good. Rare.
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A German chemist; Becher (1635-1682) played an important part in the history of chemical theory, the origins of metals and metallurgy. He introduced the ideas of three earths or terrae as constituents of all mineral substances. His ideas were expanded on by Stahl and formed the basis of the phlogiston theory. Hos above works lay out his ideas on the generation and transmutation of metals, the three earths (air, water and earth) with the last two forming all material things.