Alchemy

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Alchemy is the art of transmutation: the attempt to change one substance into another more perfect kind, most famously to turn base metals into gold by means of a sought-after agent, the philosophers’ stone. That is the popular picture, and it is not wrong. But it captures only part of what the practitioners thought they were doing, and the gap between the two is where most of the subject’s interest lies.

The word reaches English through Arabic al-kīmiyāʾ, itself drawn from Greek, and the practice has roots in the metalworking, dyeing, and mineral craft of Greco-Roman Egypt. From there it ran on three parallel tracks for two thousand years: in the Islamic world, where figures such as Jābir ibn Hayyān gave it a systematic theory; in China, where it developed largely on its own, oriented toward elixirs of long life; and in Latin Europe, where translations from Arabic in the twelfth century launched a tradition that lasted into the eighteenth. The texts are notoriously veiled, written in Decknamen — cover-names — and dense allegory, partly to guard knowledge, partly because their authors held the work to be genuinely secret.

What practitioners believed varied, and historians now stress that variety rather than a single creed. Many held that all metals were composed of the same underlying principles and differed only in degree of purity, so that lead and gold were not separate things but the same thing at different stages — which made transmutation, in principle, only an acceleration of what nature already did. The laboratory work was real: distillation, sublimation, the careful staging of color changes toward the red of the completed stone. Alongside it ran a current that read the whole process as an inner one, the purification of the operator’s own soul mirrored in the vessel — a reading later esoteric and psychological writers would greatly expand, and which it is easy to project backward further than the early sources warrant.

Scholarship has substantially revised the old story in which alchemy was mere superstition that chemistry left behind. Isaac Newton and Robert Boyle took it seriously and worked at it; the line between “alchemy” and “chemistry” was not drawn at the time and is partly a later invention. Much real chemical knowledge — acids, apparatus, procedures — came out of the alchemists’ furnaces. The spiritual and the operative were not, for most of its history, two alchemies but one.

The figure of Hermes Trismegistus presided over the Western tradition as its legendary founder, which is why the work was called hermetic and why a sealed vessel is hermetically closed. Whether the deepest claims were ever made good, no practitioner left a verifiable account of producing gold. What they left instead is an enormous, difficult literature about matter, change, and perfection — and a habit of looking at the physical world as something that might be brought to completion rather than merely used.

→ In the library: The Turba Philosophorum (Waite, 1896) · The Hermetic Museum (Waite, 1893) · Ripley Reviv'd and other tracts of Philalethes and Vaughan (1678)

→ Related: Hermes Trismegistus · Astrology · Robert Fludd · Theosophy · Gnosis