Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Alchemy is called Hermetic philosophy, from Hermes, the author of seven books, and a tablet of alchemy, which are the most ancient and esteemed writings on this subject now extant. They were found in the, Hebrew and Arabic languages, in the year of the. Christian era 400, from which date there is lite rary evidence of the lives and writings of adepts.