Alchemical and Paracelsian ideas in the .

While the emergence of a new scientific culture in 16th-century Europe is well known, the role of the actors of the Hispanic New World in this time of renewal of knowledge has long been judged marginal for two reasons: first, because the strong presence of the Inquisition in the Hispanic World has been considered by historians to have been an obstacle for research or scientific innovation; and second, because the discontinuity of the territories of the Hispanic Monarchy and the problem of distances between Spain and the New World have long been interpreted in ways that suggest the marginality and peripheral status of the American colonies. However, some works counterbalance this dismissal and shed new light on the scientific activity of the Hispanic New World. This is the case with the treatise , by the secular priest Alvaro Alonso Barba, which would achieve remarkable fame and circulation, and would become a seminal work in the fields of metallurgy and mining until the mid-1700s. The article demonstrates that this treatise also presents ideas that can be traced back to a set of Paracelsian ideas combining alchemy, pharmacopoeia, and medicine, and studies specific examples of these ideas - the description of three fundamental substances (salt, mercury and sulphur) as components of all matter, references to Epatica sulfuris, an oil capable of turning silver into gold and curing certain diseases; and the use of antimony - that together testify to the spread of the ideas of Basil Valentine and of Paracelsian influences. From this point of view, can be viewed as part of a tradition unexpectedly renewed by the author through many observations based on his own work in Peru and the discoveries he made thanks to alternative techniques. This demonstrates the richness and diversity of knowledge rooted in the New World, and links Alonso Barba's scholarly activity to some of the great schools of thought that spanned the Early Modern European world.