The work opens with an introductory analysis of the two primary interpretations of alchemy. It weighs the material school, which sought the physical transmutation of baser metals into gold using a metallic seed and a mysterious prima materia, against the moral and psychological school, which argued that the true subject of the art was man himself and the alchemical process was a metaphor for spiritual regeneration and the New Birth.
Following the introductory essays, the text provides biographical accounts of numerous celebrated alchemical philosophers, spanning from early Arabian authorities like Geber and Avicenna to European medieval scholars such as Albertus Magnus, Thomas Aquinas, and Roger Bacon. Each biography details the life, reported discoveries, and textual contributions attributed to the adept within the hermetic tradition.
The volume continues through the late medieval and Renaissance periods, documenting the lives of figures such as Raymond Lully, Arnold de Villanova, and Nicholas Flamel. Particular attention is given to Flamel's famous acquisition of the symbolic book of Abraham the Jew and his subsequent acts of public charity funded by his wealth.
The narrative advances to later practitioners, including the infamous fifteenth-century monk Basil Valentine, the adventurous Paracelsus, and the tragic histories of Alexander Sethon and Michael Sendivogius. The accounts consistently highlight the trials, imprisonments, and persecutions faced by those who claimed possession of the transmuting powder.
The physical theory and practice of the Magnum Opus are detailed across several appendices and chapters, outlining the traditional stages of the work: calcination, dissolution, separation, putrefaction, and projection. The text contrasts the literal chemical recipes of the laboratory with the mystical interpretations of later rosicrucian and theosophical writers like Jacob Böhme and Henry Khunrath.
The compilation concludes with an extensive bibliographical catalogue of hermetic philosophy and alchemy, offering a comprehensive reference list of treatises, manuscripts, and printed editions spanning centuries of occult literature.
