This essay discusses three authors from the early seventeenth century (Galileo, Descartes, and Van Helmont) and the reasons that guided their decisions to write occasionally in their respective vernacular languages even though Latin remained the accepted language for learned communication. From their writings we can see that their choices were social, political, and always of high importance. The choice of language of these multilingual authors conveyed a message that was sometimes implicit, sometimes explicit. Their usage of both Latin and (...) vernacular proved, on the one hand, their place in the international learned community and, on the other hand, their interest and investment in changing the educational system. (shrink)

Thales is considered to be the first philosopher to pose a question about fundamental principles on which everything else relied. His candidate for ἀρχή was water because he believed that everything comes from water and that the remaining three elements can also be created from water. Alchemists, or the first chemists, relied on the ancient tradition, especially Aristotle and the theory of the four elements. That is how they came to Aristotle’s testimonies about Thales, after which alchemists, like Helmont, (...) accepted Thales’ idea that water is the basis of everything that exists. Alchemists were characterized by a tendency to experiment, not only because they tried to turn other metals into gold but also because they tried to devise medical solutions that would prevent the appearance of various diseases. Due to their rich experimental experience, alchemists have been a convenient target for “new philosophers” since the early seventeenth century. Robert Boyle belonged to that circle because he was a supporter of corpuscular theory. In this paper, I will present Boyle‘s attempt to replicate alchemical experiments, especially Helmont’s experiment with the willow tree and Bacon‘s experiment with water. After that, I will show whether Boyle’s interest in the experimental procedures of alchemists contributed more to the development of modern science than his mechanistic philosophy. (shrink)