Fermentation is a cornerstone phenomenon in Cartesian physiology, accounting for processes such as digestion or blood formation. I argue that the previously unrecognized conceptual tension between the terms ‘fermentation’ and ‘concoction’ reflects Descartes's efforts towards a novel, more thoroughly mechanistic theory of physiology, set up against both Galenism and chymistry. Similarities with chymistry as regards fermentation turn out either epistemologically superficial, or based on shared earlier sources. Descartes tentatively employs ‘fermentation’ as a less teleological alternative to ‘concoction’, later renouncing the (...) explicit use of the term, possibly to avoid chymical overtones. However, his continued use of analogies with fermentative processes in the natural world and in winemaking, coupled with a strong ontological commitment (the stance that the physiological processes are actual fermentations), leads to a reintroduction of natural teleology in his medical system, which I argue may be understood in an Aristotelian sense of ‘simple necessity’. The paper reveals a more nuanced account of Cartesian fermentative medicine, delineating some of its tensions with regard to chymistry as they play out in the dynamics of fermentation and concoction, and linking the analogies to fermentation processes to the difficulties in erasing teleology altogether. (shrink)

This essay proposes to discuss the manner in which Jan Baptista van Helmont helped to transform the Neoplatonic notions of vital spirit and of ferment by giving these notions an unambiguously chemical interpretation, thereby influencing the eventual naturalization of these ideas in the work of late seventeenth century chymists. This chemical interpretation of vital spirit and ferment forms part of Helmont’s hybrid ontology, which fuses a corpuscular conception of minima naturalia with a non-corporeal conception of semina rerum. For Helmont, chemical (...) alterations involve the minima as physical units but also depend upon ferments that are contained in the semina, which function as formative spiritual agents. Helmont’s nuanced ontology ultimately contributes to the development of modern corpuscularian theory by explaining many chemical reactions in fundamentally corpuscular terms, as the addition and subtraction of particles. (shrink)

Summary Robert Boyle is remembered largely for his integration of experiment and the ?mechanical philosophy?. Although Boyle is occasionally elusive as to what he means precisely by the ?mechanical philosophy?, it is clear that a major portion of it concerned his corpuscular theory of matter. Historians of science have traditionally viewed Boyle's corpuscular philosophy as the grafting of a physical theory onto a previously incoherent body of alchemy and iatrochemistry. As this essay shows, however, Boyle owed a heavy debt to (...) a longstanding alchemical theory that postulated the corpuscular make-up of metals and various reagents. I have elsewhere argued in a general way for Boyle's debt to alchemical corpuscular theory, but in the present essay I show one of his precise sources?namely the Wittenberg medical professor Daniel Sennert (1572?1637). In his youth Boyle wrote a treatise on corpuscularianism, Of the Atomicall Philosophy, that borrowed heavily from Sennert without acknowledgement. Later works, such as The Sceptical Chymist, elaborate on these borrowings. This discovery shows that we cannot view Boyle's corpuscular philosophy as an imposition of physics on chemistry: instead, it appears that it originally grew out of chemistry itself. The discovery also throws an interesting light on Boyle's attitude toward sources. (shrink)

ArgumentThis article argues that during the seventeenth century chemistry achieved intellectual and institutional recognition, starting its transition from a practical art – subordinated to medicine – into an independent discipline. This process was by no means a smooth one, as it took place amidst polemics and conflicts lasting more than a century. It began when Andreas Libavius endeavored to turn chemistry into a teaching discipline, imposing method and order. Chemistry underwent harsh criticism from Descartes and the Cartesians, who reduced natural (...) phenomena to the mechanical affections of matter, leaving little room for chemistry as an independent discipline. Boyle rejected the chemical principles and promoted the fusion of chemistry with corpuscularianism. He did not reduce chemical phenomena to the mechanical affections of matter, but strived to promote chemistry as part of natural philosophy. Lemery gave strong impulse to the recognition of chemistry as a discipline in its own right by fostering a compromise of chemistry and mechanism. Lemery adopted the chemical principles, but did not see them as the ultimate ingredients of bodies. In order to promote chemistry, he distanced it from alchemy and pursued the reform of chemical terminology. (shrink)

SummaryHistorians of science have neglected early modern natural philosophers' varied attitudes to the history of philosophy, often preferring to use loose labels such as ‘Epicureanism’ to describe the survival of ancient doctrines. This is methodologically inappropriate: reifying such philosophical movements tells us little about the complex ways in which early modern natural philosophers approached the history of their own discipline. As this article shows, a central figure of early modern natural philosophy, Robert Boyle, invested great intellectual energy into his depiction (...) of the history of philosophy. Boyle's historical worldview was mediated through an array of textual traditions: classical, patristic, humanist and contemporary. Drawing extensively on his manuscript notes, this is examined for three topics. First, from his turn to natural philosophy in the late 1640s, Boyle combined a sceptical attitude towards philosophy's potential – stemming from humanist historicisations of the ‘speculative’ heritage of Greek philosophy – with a belief in natural philosophy's efficacy as a spiritual exercise, as performed by ancient ‘priests of nature’. Second, Boyle's attitude to the history of matter theory was far more complex than any simple comparison with ‘ancient atomism’ can convey. Unlike many of his contemporaries, Boyle held Epicurus to be a speculative and reductionist philosopher, leading him to posit a different lineage for a non-reductionist corpuscularianism which depended on exploitation of non-standard historiographical traditions. Appreciating this allows us to make an intervention in the ongoing debate about the relationship between corpuscularianism, chymistry and experiment in Boyle's philosophy. Third, Boyle's historicisation of supposedly anthropomorphic philosophies in his famous Free Enquiry exploited recent theological historiography, most importantly Samuel Parker's combination of the history of idolatry with the history of Greek philosophy, which itself relied on developments in continental sacred history. It was this historicisation, rather than any philosophical realities, which led to the positing of the mechanical philosophy as more compatible than Aristotelianism with Christian doctrine. (shrink)

This paper investigates the emergence, in the second part of the 17th century, of a new body of experimental knowledge dealing with the chemical transformations of water taking place in plants. We call this body of experimental knowledge a “chemical history of vegetation.” We show that this chemical natural history originated, in terms of recipes and methods of investigation, in the works of Francis Bacon and that it was constructed in accordance with Bacon's precepts for putting together natural and experimental (...) histories. Our paper covers a wide array of experimental investigations, carried out by people with different backgrounds, theoretical assumptions, and metaphysical allegiances (Thomas Browne, Robert Sharrock, Robert Boyle, Nehemiah Grew, John Beale, and John Evelyn). We claim that, despite their differences, these naturalists had a lot in common. First, they treated plants as laboratories of chemical investigation. Second, they used the experiments with plants to develop tools, hypotheses, and operational concepts, which travelled from one naturalist to the other, even when their respective explanatory vocabularies were widely different. Third, we show that some of them also manifested an interest in defining and clarifying the limits and structure of this new body of experimental knowledge, displaying, thus, a certain disciplinary unity. (shrink)

vincenzo Galilei - father of Galileo Galilei- was a music theorist and lutenist. In his treatises he advocated that music was primarily based on physical phenomena, namely sound, and dismissed the Pythagorean-Platonic musical tradition based.