Abstract

Relying on the double meaning of Alkaest on the texts of the first paracelsians, in a first sense the universal dissolvent of the alchemic Work, in a second a wonderful epatic medicine, the paper outlines history and spread of this alchemical substance, from the late XVI century to the early XVIII. With the growing dissemination of Franciscus Van Helmont and his followers writings, the Alkaest as universal solvent earns credibility, touching his peak probably in England, where arouses the strong interest of George Starkey, physician and alchemist, and Robert Boyle, chemist and inventor.