Includes bibliographical references and index.

The enigma of Newton's alchemy -- Problems of authority and language in Newton's chymistry -- Religion, ancient wisdom, and Newton's alchemy -- Early modern alchemical theory: the cast of characters -- The young thaumaturge -- Optics and matter: Newton, Boyle, and Scholastic Mixture Theory -- Newton's early alchemical theoricae: preliminary considerations -- Toward a general theory of vegetability and mechanism -- The doves of Diana: first attempts -- Flowers of lead: Newton and the alchemical florilegium -- Johann de Monte-Snyders in Newton's alchemy -- Attempts at a unified practice: Keynes 58 -- The fortunes of Raymundus: Newton's late florilegia -- The shadow of a noble experiment: Newton's laboratory records to 1696 -- The quest for sophic sal ammoniac -- Extracting our Venus -- Nicolas Fatio de Duillier, alchemical collaborator -- Praxis: delusions of a disordered mind? -- The warden of the mint and his alchemical associates -- Public and private: Newton's chrysopoeia and the republic of chymistry -- The ghost of Sendivogius: niter, sulfur, fermentation, and affinity -- A final interlude: Newton and Boyle -- Appendices: 1. The origin of Newton's chymical dictionaries -- 2. Newton's "key to Snyders" -- 3. "Three mysterious fires" -- Newton's interview with William Yworth.

When Isaac Newton's alchemical papers surfaced at a Sotheby's auction in 1936, the quantity and seeming incoherence of the manuscripts was shocking. No longer the exemplar of Enlightenment rationality, the legendary physicist suddenly became "the last of the magicians." Newton the Alchemist unlocks the secrets of Newton's alchemical quest, providing a radically new understanding of the uncommon genius who probed nature at its deepest levels in pursuit of empirical knowledge. In this evocative and superbly written book, William Newman blends in-depth analysis of newly available texts with laboratory replications of Newton's actual experiments in alchemy. He does not justify Newton's alchemical research as part of a religious search for God in the physical world, nor does he argue that Newton studied alchemy to learn about gravitational attraction. Newman traces the evolution of Newton's alchemical ideas and practices over a span of more than three decades, showing how they proved fruitful in diverse scientific fields. A precise experimenter in the realm of "chymistry," Newton put the allusive riddles of alchemy to the test in his lab. He also used ideas drawn from the alchemical texts to great effect in his optical experimentation. In his hands, alchemy was a tool for attaining the material benefits associated with the philosopher's stone and an instrument for acquiring scientific knowledge of the most sophisticated kind.