I argue that Descartes explains physiology in terms of whole systems, and not in terms of the size, shape and motion of tiny corpuscles (corpuscular mechanics). It is a standard, entrenched view that Descartes’ proper means of explanation in the natural world is through strict reduction to corpuscular mechanics. This view is bolstered by a handful of corpuscular–mechanical explanations in Descartes’ physics, which have been taken to be representative of his treatment of all natural phenomena. However, Descartes’ explanations of the (...) ‘principal parts’ of physiology do not follow the corpuscular–mechanical pattern. Des Chene has identified systems in Descartes’ account of physiology, but takes them ultimately to reduce down to the corpuscle level. I argue that they do not. Rather, Descartes maintains entire systems, with components selected from multiple levels of organization, in order to construct more complete explanations than corpuscular mechanics alone would allow. (shrink)

The old and yet unanswered question of the precise nature of light, although completely and deliberately neglected nowadays, is reexamined by several new methods, both theoretical and experimental. The wave-corpuscle duality of light then appears somewhat different, and a new hypothesis on the process of electromagnetic interaction may be proposed in an attempt to untangle the dilemma and reach a more realistic description.

This paper investigates the relationship between some corpuscularian and Aristotelian strands that run through the thought of the sixteenth-century philosopher and physician Julius Caesar Scaliger. Scaliger often uses the concepts of corpuscles, pores, and vacuum. At the same time, he also describes mixture as involving the fusion of particles into a continuous body. The paper explores how Scaliger’s combination of corpuscularian and non-corpuscularian views is shaped, in substantial aspects, by his response to the views on corpuscles and the vacuum in (...) the work of his contemporary, Girolamo Fracastoro. Fracastoro frequently appears in Scaliger’s work as an opponent against whom numerous objections are directed. However, if one follows up Scaliger’s references, it soon becomes clear that Scaliger also shares some of Fracastoro’s views. Like Scaliger, Fracastoro suggests corpuscularian explanations of phenomena such as water rising in lime while at the same time ascribing some non-corpuscularian properties to his natural minima. Like Scaliger, Fracastoro maintains that there is no vacuum devoid of bodies since places cannot exist independently of bodies (although their opinions diverge regarding how exactly the relevant dependency relation might be explicated). Finally, like Scaliger, Fracastoro connects a continuum view of mixture with a theory of natural minima. (shrink)

This study presents a substantial and often radical reinterpretation of some of the central themes of Locke's thought. Professor Alexander concentrates on the Essay Concerning Human Understanding and aims to restore that to its proper historical context. In Part I he gives a clear exposition of some of the scientific theories of Robert Boyle, which, he argues, heavily influenced Locke in employing similar concepts and terminology. Against this background, he goes on in Part II to provide an account of Locke's (...) views on the external world and our knowledge of it. He shows those views to be more consistent and plausible than is generally allowed, demonstrating how they make sense and enable scientific explanations of nature. In examining the views of Locke and Boyle together, the book throws light both on the development of philosophy and the beginnings of modern science, and in particular it makes a considerable and original contribution to our understanding of Locke's philosophy. (shrink)

Historical accounts of the work of J. J. Thomson find a contradiction in his work. On the one hand, he is presented as a Maxwellian theoretical physicist dealing with a typically Victorian entity, the ether. On the other hand, the analysis of his experimental work at the Cavendish seems to have little connection with his mathematical work. In this paper, I discuss the metaphysical views of J. J. Thomson, and argue that his deep belief in the ultimate continuity of matter (...) can be seen to give a framework to both his theoretical and his experimental work. His metaphysical beliefs were not in the least shaken by the discovery of discrete phenomena and entities, not even by his suggestion of the existence of corpuscles later known as electrons. His formation in Cambridge, together with some ideas that he acquired in his youth at Owens College, Manchester, are the key to understanding his metaphysics and the role it plays in his scientific work. (shrink)

This paper analyzes the theory of mixtures, material substances and corpuscles put forward by the Portuguese Thomistic philosopher Francisco Soares Lusitano. It has been argued that the incapacity of the Aristotelian-Thomistic tradition to reconcile an Aristotelian theory of mixtures with hylomorphism opened the way to the triumph of atomism in the seventeenth century. By analyzing Soares Lusitano’s theory of mixtures, this paper aims to demonstrate that early modern Thomism not only rendered the Aristotelian notion of elements compatible with the metaphysical (...) bases of hylomorphism, but further incorporated an explanation of physical phenomena based upon the notion that bodies were basically made up of small and subtle corpuscles. By doing so, it shows that, contrary to what is so often claimed, early modern corpuscularism was not intrinsically incompatible with late Aristotelian philosophy. (shrink)

Daniel Garber - Elements, Principles, and Corpuscles: A Study of Atomism and Chemistry in the Seventeenth Century - Journal of the History of Philosophy 40:3 Journal of the History of Philosophy 40.3 400-401 Book Review Elements, Principles, and Corpuscles: A Study of Atomism and Chemistry in the Seventeenth Century Antonio Clericuzio. Elements, Principles, and Corpuscles: A Study of Atomism and Chemistry in the Seventeenth Century. Dordrecht: Kluwer Academic Publishers, 2000. Pp. xi + 223. Cloth, $89.00. Over the last few decades, (...) historians of early-modern philosophy have tried to relate the main figures in the canon to contemporary developments in the sciences. Chief among these scientific developments has been the rise of the mechanical/corpuscular philosophy. On that view, everything in the physical world can be explained in terms of the size, shape, and motion of the tiny.. (shrink)

Although Boyle has been regarded as a champion of the seventeenth century Cartesian mechanical philosophy, I defend the position that Boyle’s views conciliate between a strictly mechanistic conception of fundamental matter and a non-reductionist conception of chemical qualities. In particular, I argue that this conciliation is evident in Boyle’s ontological distinction between fundamental corpuscles endowed with mechanistic properties and higher-level corpuscular concretions endowed with chemical properties. Some of these points have already been acknowledged by contemporary scholars, and I actively engage (...) with their ideas in this paper. However I attempt to contribute to the debate over Boyle’s mechanical philosophy by arguing that Boyle’s writings suggest an emergentist, albeit still mechanistic, notion of chemical properties. I contrast Boyle’s views against those of strict reductionist mechanical philosophers, focusing on the famous debate with Spinoza over the redintegration of niter, and argue that Boyle’s complex chemical ontology provides a more satisfactory understanding of chemical phenomena than is provided by a strictly reductionist and Cartesian mechanical philosophy. (shrink)

Summary Robert Boyle did not subordinate chemistry to mechanical philosophy. He was in fact reluctant to explain chemical phenomena by having recourse to the mechanical properties of particles. For him chemistry provided a primary way of penetrating into nature. In his chemical works he employed corpuscles endowed with chemical properties as his explanans. Boyle's chemistry was corpuscular, rather than mechanical. As Boyle's views of seminal principles show, his corpuscular philosophy cannot be described as a purely mechanical theory of matter. Boyle's (...) classification of corpuscles allowed him to connect his corpuscular views of matter with chemistry. Boyle did not rule out the possibility of a classification of chemical substances based on their properties: his aim was to reform the received classification. (shrink)

SummaryThe following two questions are examined: 1o Do the unobservable parameters possess precise, though unknown, values ? 2o If these unobservable values were known, would it be possible to make precise predictions of the reults of later measurements ?The answer is shown to be negative; the questions, therefore, are not meaningless, being capable of a falsification. The inquiry leads to the establishment of a principle of anomaly, more precisely speaking, of causal anomaly, which is to be added to Heisenberg's principle (...) of indeterminacy. This principle states that the principle of action by contact is violated whenever definite values are assigned to the unobserved quantities, i. e., when an exhaustive interpretation of quantum mechanics is used. The two most important exhaustive interpretations are given by the corpuscle and the wave interpretation; each leads to causal anomalies, though for different places.The causal anomalies can be eliminated by the use of a restrictive interpretation, which separates statements about unobserved quantities, as a third propositional class, from true or false statements. Bohr and Heisenberg have called such statements meaningless, without being able to eliminate them completely; these statements arte thus merely shifted into the metalanguage. In another version of the restrictive interpretation such statements are assigned a third truth value, the value indeterminate, and quantum mechanics is then presented in the form of a three‐valued logic.The inquiry is carried through without the presupposition of any philosophical conception; every interpretation is examined with respect to the consequences to which it leads. ‐ H. R.'. (shrink)

Peter Anstey presents a thorough and innovative study of John Locke's views on the method and content of natural philosophy. Focusing on Locke's Essay concerning Human Understanding, but also drawing extensively from his other writings and manuscript remains, Anstey argues that Locke was an advocate of the Experimental Philosophy: the new approach to natural philosophy championed by Robert Boyle and the early Royal Society who were opposed to speculative philosophy. On the question of method, Anstey shows how Locke's pessimism about (...) the prospects for a demonstrative science of nature led him, in the Essay, to promote Francis Bacon's method of natural history, and to downplay the value of hypotheses and analogical reasoning in science. But, according to Anstey, Locke never abandoned the ideal of a demonstrative natural philosophy, for he believed that if we could discover the primary qualities of the tiny corpuscles that constitute material bodies, we could then establish a kind of corpuscular metric that would allow us a genuine science of nature. It was only after the publication of the Essay, however, that Locke came to realize that Newton's Principia provided a model for the role of demonstrative reasoning in science based on principles established upon observation, and this led him to make significant revisions to his views in the 1690s. On the content of Locke's natural philosophy, it is argued that even though Locke adhered to the Experimental Philosophy, he was not averse to speculation about the corpuscular nature of matter. Anstey takes us into new terrain and new interpretations of Locke's thought in his explorations of his mercurialist transmutational chymistry, his theory of generation by seminal principles, and his conventionalism about species. (shrink)

The prominent place 0f corpuscularizm mechanism in L0ckc`s Essay is nowadays universally acknowledged} Certainly, L0ckc’s discussions 0f the primary/secondary quality distinction and 0f real essences cannot be understood without reference to the corpuscularizm science 0f his day, which held that all macroscopic bodily phenomena should bc explained in terms 0f the motions and impacts 0f submicroscopic particles, 0r corpuscles, each of which can bc fully characterized in terms of 21 strictly limited range 0f (primary) properties: size, shape, motion (or mobility), (...) and, perhaps, solidity 0r impcnctrability.2 Indeed, L0ckc’s lists 0f primary quali-. (shrink)

In this paper I make a new attempt to interpret Locke's fascinating theory of primary and secondary qualities. The function of primary qualities, I argue, is to provide us with an idea of what the insensible corpuscles are like, of which every portion of matter is composed. Therefore, these qualities must be common both to sensible bodies and insensible corpuscles, and their ideas must resemble them. The function of secondary qualities is to make the primary qualities of the corpuscles accessible (...) to us. Secondary qualities are called immediately perceivable if they can be read off from the very body whose corpuscles they make appear; and they are called mediately perceivable, or bare powers, if they must be read off from another body. The classes of primary and secondary qualities depend upon the acuteness of our senses, and membership in them can be ascertained by ' Locke's method of division'. Despite all its ingenious calibration in experience, his distinction must be acknowledged, eventually, to go far beyond the bounds of sense allowed within by his type of empiricism. (shrink)

In contrast to the recent trend of taking external world skepticism as a narrow problem for a demanding conception of "objective" or "certain" knowledge about the world, my thesis offers a re-examination of the distinctively perceptual basis of the skeptical problem. On my view the skeptic challenges the very possibility of rationally justifying beliefs in so far as they are based on sense experience, a characterization that helps to explain the continuity into the modern period of the ancient skeptical challenge (...) to the pretensions of reason. What is newly radical in external world skepticism is the discovery of the inner realm of the mind, and hence, of inner states as a component of every sense experience. ;I argue that the skeptic relies upon a distinctive, intuitively compelling, conception of sense experience which I call the causal model of experience. This is the view that experience is constituted by self-standing subjective experiences and their external causes, where cause and effect are logically distinct existences. The causal model is not to be identified with a view of perception as epistemically mediated by a "veil of ideas", though it can lead one to embrace that doctrine. My aim is twofold: to understand the motivation for the skeptic's causal model of experience; and to show that, when thought through, this model can ultimately be shown to be incoherent. ;The causal model has its roots in 17th century scientific metaphysics and the idea that the world can be exhaustively explained in terms of mechanical interactions between primary-qualified corpuscles governed by mathematically describable laws. I argue that the perceptual relation is not a mere efficient causal relation and I show that the skeptic is in the incoherent position of wanting a "private" language to describe his subjective experiences despite insisting on conditions of autonomy that deprive his terms of the normativity that is a necessary condition of meaning. Thus I do not answer the skeptical problem so much as undercut the basis upon which it is posed in the first place. (shrink)

The invisible object, in the eighteenth century, is not an evidence. It is the result of textual and semantic learning. Which concrete strategies are used to construct and depict objects out of sight? How do we make them a cognitive reality acceptable to a scientific community? This paper first highlights the conditions for the emergence of a field of microscopic knowledge and its epistemological consequences. Then we consider the microscopic gaze in terms of learning, situated between the act of observation (...) as such and discursive practices. We conclude by studying a concrete case of “negotiation of the invisible” in a correspondence between Carl Linnaeus and John Ellis concerning corpuscles observed in mushroom infusions. (shrink)

1. The sequence of the organisation levels is regarded as originating from a sequence of symmetry breakings. Each breaking generates a more improbable structure. In addition to the Euclidian symmetries, homogeneity, isotropy, translation, rotation, helix displacement, neutrality and even indiscernibility can be broken. Here are considered the initial and the subatomic breaking molecular morphogenesis and other higher breakings.2.1 HOMOGENEITY BREAKING OF THE VACUUM SPACE. We studied this as a new model of wave-corpuscle relation. Every noticeable point breaks the space (...) homogeneity. Directed by a momentum this breaking operates as a fissure.2. Postulate of the corpuscle. The quantum mechanical corpuscle is the end of a fissure, the momentum of which characterises direction and velocity.2.2. Postulate of the wave. The associate wave comes from the end of the fissure and works to split the medium.2.3. Corollary to the trajectory. The fissure prefers continuity and a straight line. Nevertheless the fissure can stop at a point and then start from an other point. This discontinuity and any momentum possible discontinuity are limited only by uncertainty relationships; frequency of discontinuity is limited by the first one. Vacuum has no memory of the fissures. 2.4.Corollary to the localisation. The fissure diminishes the medium constraints and allows the medium to vibrate in a domain surrounding the end of the fissure.2.5. Physical analogies. – - Photo-elastic studies of the fissuration of solids show a little sphere and a wavelike perturbation at the end of the fissure. – - A fragile and resonating object can be broken by a sound wave. This crack emits a sound wave. Here we consider one associated wave, emitted and absorbed. – - Broken panes picture an emission of rays. li]2.6. Consequences of the fissure model. (shrink)

Galileo and his fellowers discovered, and subsequent centuries have amply confirmed, that you get much better predictions by thinking of things as masses of particles blindly bumping each other than by thinking of them as Aristotle thought of them — animistically, teleologically, anthromorphically. They also discovered that you get a better handle on the universe by thinking of it as infinite and cold and comfortless than by thinking of it as finite, homey, planned, and relevant to human concerns. Finally, they (...) discovered that if you view planets or missiles or corpuscles as point-masses, you can get nice simple predictive laws by looking for nice simple mathematical ratios. These discoveres are the basis of modern technological civilization. We can hardly be too grateful for them. But they do not, pace Descartes and Kant, point any epistemological moral. (shrink)

The Timaeus is the dialogue that was for many centuries the most influential of Plato’s works. Among its readers we find Descartes, Boyle, Kepler and Heisenberg. In the first division of Timaeus Plato deals with the theory of celestial motion, in the second he presents us with the first mathematical theory of the structure of matter. Here, in a gigantic step forward with respect to the preceding Democritean atomistic theory with its unalterable micro-entities, he introduces the intertransformability of elementary corpuscles (...) and with that the first “chemical” reactions in history. Plato’s geometrical interpretation of Empedocles’ elements and his geometrical atomism is described at the molecular, atomic and sub-atomic level. The “chemical” reactions reported in Timaeus are written in the enlightening chemical symbolism, analogies with modern chemistry are noticed throughout. (shrink)

The prominent place of corpuscularian mechanism in Locke's Essay is nowadays universally acknowledged. Certainly, Locke's discussions of the primary/secondary quality distinction and of real essences cannot be understood without reference to the corpuscularian science of his day, which held that all macroscopic bodily phenomena should be explained in terms of the motions and impacts of submicroscopic particles, or corpuscles, each of which can be fully characterized in terms of a strictly limited range of properties: size, shape, motion, and, perhaps, solidity (...) or impenetrability. Indeed, Locke's lists of primary qualities are quite consistent with those found in the work of his friend Robert Boyle, a prominent defender of the corpuscularian program; his real essences of substances appear to be corpuscular constitutions, arrangements of particles. (shrink)

Harvey and Highmore experimented together on chick fetuses at Oxford in the early 1640s, yet in 1651 published significantly different treatises on generation that emphasize their reliance on observations and dissections of fetal chicks at different stages of incubation. The key differences follow from their views on matter and souls. Harvey conceives of living bodies as governed by Aristotelian souls and faculties. Highmore views matter as made of corpuscles and describes organs as involved in chemical procedures. Highmore's treatise is a (...) response to Digby's claim that heat, moisture, and pressure could explain generation. Although Digby's treatment lacks Harvey's and Highmore's attention to detail, it offers a point of comparison that leads to a more nuanced understanding of their explanation. Moreover, Highmore's dedication of his work to Boyle provides a new perspective on both men's intellectual evolution from the latter part of the 1640s to 1651. (shrink)