El objetivo del presente escrito es presentar los principales rasgos del atomismo quí­mico que se desarrolla a principios del siglo XVII, ver cómo se desarrolla en el atomismo de Gassendi y la influencia que tienen en la filosofía del joven Leibniz. Tanto la influencia de la corriente alquímica e iatroquímica en este tipo de atomismo, como la separación de algu­nos postulados fundamentales del mecanicismo, tienen una clara influencia en los primeros escritos de Leibniz.

This book offers a comprehensive treatment of the philosophical system of the seventeenth-century philosopher Pierre Gassendi. Gassendi's importance is widely recognized and is essential for understanding early modern philosophers and scientists such as Locke, Leibniz and Newton. Offering a systematic overview of his contributions, LoLordo situates Gassendi's views within the context of sixteenth- and early seventeenth-century natural philosophy as represented by a variety of intellectual traditions, including scholastic Aristotelianism, Renaissance Neo-Platonism, and the emerging mechanical philosophy. LoLordo's work will be essential (...) reading for historians of early modern philosophy and science. (shrink)

This book addresses two related generalizations that persist in the history of seventeenth‐century chemistry, both of which are crucial to the canonical narrative of the scientific revolution. The first is that the experimental program of Robert Boyle led him to abandon the Aristotelian and Paracelsian chemical theories of his predecessors and adopt a reductionist, materialist matter theory from the French mechanical philosophers Pierre Gassendi and René Descartes, forever changing the nature of chemical theory and paving the way for the modernization (...) of chemistry during the late eighteenth and nineteenth centuries. The second is that the theories of Gassendi and Descartes were unequivocally “mechanical” and reflect the reemergence and supervention of classical atomism over alchemical and vitalist ontologies. Both of these generalizations have been successfully challenged in the past fifteen years. The present book collects and explicates these findings, while focusing on Robert Boyle and the legacy of his matter theory for late seventeenth‐century European chemistry. In the end, Antonio Clericuzio shows that Cartesian mechanical philosophy did not have a decisive impact on the matter theory of the chemists who held onto chemical principles and qualities even as they adopted various forms of Boyle's corpuscular hypothesis.In an able historiographical overview, Clericuzio shows how Boyle was thrust into the mainstream of revolutionary science by Thomas Kuhn, Marie Boas, and A. R. Hall, who depended on an eighteenth‐century construction of Boyle that suited the needs of the experimentalism and materialism of Enlightenment science but hardly reflected the thinking of Boyle and his contemporaries, as is evident in the texts cited here. In fact, Boyle did not rigorously apply mechanical philosophy to his chemistry and medicine, as he did to his physics, and he fashioned his corpuscularist matter theory from the active seminal principles of the Paracelsians and Helmontians as well as the atoms of Epicurean theory and the minima naturalia of medieval Aristotelian alchemy. William Newman and Lawrence Principe have recently argued the importance of the medieval alchemists' materialism for seventeenth‐century chemistry, and Newman has credited J. B. Van Helmont and Daniel Sennert with forging medieval corpuscular minima into the corpuscles adopted by Boyle, but here Clericuzio argues that corpuscles were hardly evident in sixteenth‐century alchemy, that Van Helmont's theory was not truly corpuscular, and that Sennert's corpuscles still possessed Aristotelian forms. This matter awaits resolution.One of the strengths of this book is Clericuzio's treatment of the pre‐Boylean developments within chemical theory, documenting that corpuscularism did not emerge from the classical atomism of the French mechanists but evolved from various considerations of alchemical and Paracelsian theory, combined with Aristotelian natural philosophy. In the first place, the idea of semina, which Boyle explained as corpuscles endowed with generative power and specific developmental programming, was clearly present in chemical philosophy from Paracelsus and Petrus Severinus to Van Helmont, whose influence on Boyle and his contemporaries is now well established. Moreover, a materialized version of semina already existed in the medical theory of Girolamo Fracastoro, who adapted the idea from Lucretius. As well, semina were being corpuscularized and materialized in the early part of the century, as reflected in treatises by Nicholas Hill.One cannot expect a book of such wide‐ranging scholarship to reflect all of the recent literature in the field, but the author's failure to engage Barbara Beigun Kaplan's study of Boyle is unfortunate, both because her work speaks directly to the perspectives on Boyle that are treated here and because points on which their accounts differ need clarification. In sum, Clericuzio's book presents a much‐needed rectification of the entrenched Enlightenment view of Boyle and the development of corpuscular chemistry but is not the last word on Boyle's relationship to his predecessors' ideas on matter. (shrink)

Although Leibniz characterised himself in the “New Essays” as a “Platonic” as opposed to a “Democritean” philosopher, his intellectual relationship with the most famous of the Renaissance Neoplatonists, Marsilio Ficino, has received little attention. Here we review what can be thus far established regarding Leibniz’s acquaintance with portions of Ficino’s Opera omnia of 1576. We compare Ficino’s disenchantment with the atomistic materialism of Lucretius, which he had favoured in his youth, and his turn to Platonism for inspiration, with Leibniz’s own (...) reported disenchantment with Gassendi’s Epicurean atomism and his invention of a vitalistic monadology that, despite Leibniz’s reservations regarding Ficinian magic, resembles Ficinian nature philosophy in number of striking respects. (shrink)

Gottfried Leibniz is well known for his claim to have “rehabilitated” the substantial forms of scholastic philosophy, forging a reconciliation of the New Philosophy of Descartes, Mersenne and Gassendi with Aristotelian metaphysics (in his so-called Discourse on Metaphysics, 1686). Much less celebrated is the fact that fifty years earlier (in his Hypomnemata Physica, 1636) the Bratislavan physician and natural philosopher Daniel Sennert had already argued for the indispensability to atomism of (suitably re-interpreted) Aristotelian forms, in explicit opposition to the rejection (...) of substantial forms by his fellow atomist Sébastien Basson.1.. (shrink)

This set of problems first came to light with the Eleatic criticism of Pythagorean theory, and dramatically revealed their importance in the paradoxes of Zeno, which have retained their relevance down the ages, and play a significant role, as we shall see, in the thought of Whitehead. In antiquity Aristotle had attained the clearest realization of these problems. It was in terms of them that he analyzed and rejected the theory of Leukippos and Demokritos of atoms and the void, and (...) worked out his own alternative theory. In the Renaissance these problems became crucial again, especially in the thought of Bruno and Patrizzi. Leibniz saw them as the basic issue presented by the theories of the seventeenth century, and it was in terms of these problems that he made his examination of Descartes' doctrine of res extensa, of Gassendi's revival of Democritean atomism, as well as of Newton's doctrine of space. Insufficient attention to these problems had resulted in his contemporaries getting caught in what he referred to as the "labyrinth of the composition of the continuum"-adopting this phrase from the title of a book by Libertius Fromond which had been published in 1631. Leibniz believed himself to have found the Adriadne's thread out of the labyrinth in the conception of body, as well as of space and time, as phenomenal. In Kant's view this way out was tenable only with a considerable philosophical reconstruction, which he provided with his transcendental philosophy. (shrink)

This landmark study examines the role played by the rediscovery of the writings of the ancient atomists, Epicurus and Lucretius, in the articulation of the major philosophical systems of the seventeenth century, and, more broadly, their influence on the evolution of natural science and moral and political philosophy. The target of sustained and trenchant philosophical criticism by Cicero, and of opprobrium by the Christian Fathers of the early Church, for its unflinching commitment to the absence of divine supervision and the (...) finitude of life, the Epicurean philosophy surfaced again in the period of the Scientific Revolution, when it displaced scholastic Aristotelianism. Both modern social contract theory and utilitarianism in ethics were grounded in its tenets. Catherine Wilson shows how the distinctive Epicurean image of the natural and social worlds took hold in philosophy, and how it is an acknowledged, and often unacknowledged presence in the writings of Descartes, Gassendi, Hobbes, Boyle, Locke, Leibniz, Berkeley. With chapters devoted to Epicurean physics and cosmology, the corpuscularian or "mechanical" philosophy, the question of the mortality of the soul, the grounds of political authority, the contested nature of the experimental philosophy, sensuality, curiosity, and the role of pleasure and utility in ethics, the author makes a persuasive case for the significance of materialism in seventeenth-century philosophy without underestimating the depth and significance of the opposition to it, and for its continued importance in the contemporary world. Lucretius's great poem, On the Nature of Things, supplies the frame of reference for this deeply-researched inquiry into the origins of modern philosophy. (shrink)

Este trabajo analiza la presencia de la química en el pensamiento leibniciano. Se valora su contribución al nacimiento de la nueva química y la superación de la vieja alquimia. Se analizan los principales escritos consagrados por el filósofo a esta problemática, para establecer cómo evoluciona y qué relaciones tiene con sus trabajos en otras disciplinas.

This is the first volume compiling English translations of Leibniz's journal articles on natural philosophy, presenting a selection of 26 articles, only three of which have appeared before in English translation. It also includes in full Leibniz's public controversies with De Catelan, Papin, and Hartsoeker. The articles include work in optics, on the fracture strength of materials, and on motion in a resisting medium, and Leibniz's pioneering applications of his calculus to these issues by construing them as mini-max and inverse (...) tangent problems. Other topics covered by the articles include: criticisms of the Cartesian estimate of motive force and Leibniz's proposal of a different way of estimating force to replace it; a proposed theory of celestial motions and gravitation, and derivation of the inverse square law; challenge problems concerning the isochronous curve and the catenary; a sample of work on gaming theory; and Leibniz's critique of atomism. (shrink)

Vol. 1: Life of Leibniz and basic philosophy -- Vol. 2: Logic, physics, chemistry, medicine, natural history -- Vol. 3: Mathematics -- Vol. 4: Philosophy, history, jurisprudence -- Vol. 5: Correspondence -- Vol. 6: Philology and etymology.

Nature's simplest atom and mother of all matter, hydrogen feeds the stars as well as interlaces the molecules of their biological descendants – to whom it ultimately whispers the secrets of quantum reality. Hydrogen’s most prevalent earthly guise lies within the composition of water. A slight electrical disturbance can split water into hydrogen and oxygen gas, resulting in diaphanous bubble clouds slowly rising towards the liquid’s surface. Though the founding fathers of electrochemistry posited that the mass of liberated bubbles (...) is directly proportional to the input voltage, certain modes of electrolysis release more energy than is spent. One such mode involves water’s Janus-faced capacity to react as either an acid or a base. Emanating from an array of electrodes at the bottom of a water-filled chamber, strings and strata of hydrogen bubbles meticulously trace their emergent surroundings. In addition to eddy formations incited by a bubble's rapid growth and subsequent detachment from the electrode surface, acoustic vibrations permeate the two-phase fluid. As the sonic frequency and amplitude rises, the hydrogen bubbles start to coalesce with one another. When the sound field reaches maximum intensity, it can trap bubbles within its antinodes. The vibrations are generated both by transducers and by the bubbles themselves, which emit frequencies ranging from the audible spectrum to as high as 800 kHz. A white laser sheet scans and illuminates the hydrogen bubble trajectories. Each quivering bubble-lens divides the white light into its constituent spectrum of colors. While scanning, the laser sheet also swiftly pulsates and thereby extends the perceivable resolution of micro-momentary bubble dynamics. Before it even begins to map out its vibratory environment, a bubble goes through various stages of spatio-temporal evolution. During the first phase of growth, a bubble nucleus inflates linearly with time. At the second stage, bubble growth is limited by the diffusion of gas within the liquid, causing its size to increase as the square root of time. The final phase before detachment is limited by the kinetics of dissolved gas production, causing the bubble to grow as the cube root of time.1 Beyond macroscopically observable bubbles, an expanse of nanobubbles hides within the water’s internal architecture. Some researchers presume that these nanobubbles of dissolved gas are the carriers of water’s magnetic ‘memory’, enabling electromagnetic fields to saturate its innards for hours and even days after their initial appearance. In the seas and oceans, the lingering presence of electromagnetic fields photonically imparted by sunlight, triggers the electrolysis responsible for most of the Earth’s hydrogen. An essential form of photosynthesis, solar water splitting is the cleanest and most efficient means imaginable for generating and storing energy. —Evelina Domnitch & Dmitry Gelfand *** Animals and plants are formed in earth and in water because there is water in earth, and there is pneuma in water, and there is soul heat in all pneuma ; so that in a way all things are full of soul. Hence plants and animals quickly form once this gets enclosed; and when this enclosing happens, when the corporeal liquids get heated, a sort of frothy bubble is formed. Now the difference between the various creatures which are produced in this way are due to the stuff which makes up the envelope around the soul-source.2 Throwing light into this pneumatic spray of perdurances, which would otherwise swarm below the threshold of human visibility, Evelina Domnitch and Dmitry Gelfand’s Hydrogeny saturates the viewer’s sensorial space with the nano-architectures of froth. Straddling the cell wall between scientific enquiry and artistic praxis, Hydrogeny , beckons a recasting of Lucretius' clinamen in tune with the technologies of the modern observer. For Lucretius it was the indeterminate swerving of an atomistic layer of reality which accounted for the unpredictability of change and the existence of free will. Taken up by Harold Bloom to describe the swerving of cultural production from that which has already been made, the idea has since been textually redressed by Lacan, Derrida, Serres, Deleuze, Nancy, and Badiou. Here we have been given a kaleidoscopic technique for refining and expanding awareness of our enmeshment with so many nested, atomistic layers of object-bubbles—of things—as Aristotle might say,“full of soul.” The gravitational pull of Hydrogeny ushers a de-centered human spectatorship to the ever more intimate recesses of what media philosopher N. Katherine Hayles calls our capacity for “deep attention.”3 Vaporous attention suspended and re-oriented. Microscopic as these diaphanous waves are, the calling they produce is anything but inconsequential. Evelina Domnitch and Dmitry Gelfand are two-thirds of the Amsterdam-based Art–Science Labratory, Optofonica , an atelier initiated by the Italian interdisciplinary artist TeZ in 2006. Follow more of their work at www.portablepalace.com —Isaac Linder NOTES (1) cf. Brandon, Kelsall, Levine, & Smith. “Interfacial Electrical Properties of Electrogenerated Bubbles.” Journal of Applied Electrochemistry 15 (1985):485-493. (2)Aristotle, On the Generation of Animals, 762a18, tr. A. L. Peck (Cambridge, MA: Loeb Classical Library, 1942). (3)“ My article on hyper and deep attention ,” N. Katherine Hayles, accessed on September 14, 2011. (shrink)

This look at Gassendi’s philosophy and science illuminates his contributions to early modern thought and to the broader history of philosophy of science. Two keys to his thought are his novel picture of acquiring and judging empirical belief, and his liberal account of criteria for counting empirical beliefs as parts of warranted physical theories. By viewing his philosophical and scientific pursuits as part of one and the same project, Gassendi’s arguments on behalf of atomism can be fruitfully explained as licensed (...) by his empiricism. (shrink)

This paper suggests that the cases made for atoms and the aether in nineteenth-century physical science were analogous, with the implication that the case for the atom was less than compelling, since there is no aether. It is argued that atoms did not play a productive role in nineteenth-century chemistry any more than the aether did in physics. Atoms and molecules did eventually find an indispensable home in chemistry but by the time that they did so they were different kinds (...) of entities to those figuring in the speculations of those natural philosophers who were atomists. Advances in nineteenth-century chemistry were a precondition for rather than the result of the productive introduction of atoms into chemistry. (shrink)

This paper examines what Gassendi and other seventeenth-century atomists had to say about the distinction between primary and secondary qualities, and how their view impacted their conception of mechanism.

Scholars in the early seventeenth century who studied ancient Greek scientific theories often drew upon philology and history to reconstruct a more general picture of the Greek past. Gassendi's training as a humanist historiographer enabled him to formulate a conception of the history of philosophy in which the rationality of scientific and philosophical inquiry depended on the historical justifications which he developed for his beliefs. Professor Joy examines this conception and analyzes the nature of Gassendi's historical training, especially its relationship (...) to his career as a physicist and astronomer. She shows how he rehabilitated Epicurean atomism by bringing together the arguments of the Greek atomists and those of his contemporaries. In doing so, he produced an account of the natural world which made it an object of empirical study and mechanical explanation. (shrink)

This paper discusses how Gassendi and other 17th century atomists treated the distinction between primary and secondary qualities.

The strong opposition of nineteenth-century French chemists to atomism is usually described as a national attitude due to the overarching influence of positivism in France. The explanation sounds plausible, at first glance. However, the idea that a philosophy of science acted as an obstacle to the advancement of science needs further investigation. What is meant exactly by a philosophical influence on a scientific community? In analysing the alleged influence of positivism on the chemists' community it is argued that the common (...) connection established between philosophical views and scientific attitudes leads to a misunderstanding of both philosophy and scientific activity. This paper first stresses the misreading of Auguste Comte's works; then the misunderstanding of scientific debates about atomism in chemistry. Finally it suggests an alternative view: that the atomic debates generated a variety of positivisms. (shrink)

Peter G. Sobol - Pierre Gassendi's Philosophy and Science: Atomism for Empiricists - Journal of the History of Philosophy 45:1 Journal of the History of Philosophy 45.1 161-162 Muse Search Journals This Journal Contents Reviewed by Peter G. Sobol Mcfarland, Wisconsin Saul Fisher. Pierre Gassendi's Philosophy and Science: Atomism for Empiricists. Brill's Studies in Intellectual History 131. Leiden-Boston: Brill, 2005. Pp. xxviii + 436. Cloth, $172.50. In 1971, Richard S. Westfall described Pierre Gassendi as "the original scissors and paste man": (...) an irrepressibly eclectic compiler whose Syntagma Philosophicum was published only after his death "when the author was finally beyond the possibility of adding and patching." Westfall here echoes Voltaire and Alexandre Koyré who, as quoted in Saul Fisher's.. (shrink)

Chemistry and dynamics are closely related in G.W. Leibniz's thinking, from the corpuscularism of his youth to the theory of conspiracy movements that he proposes in his later years. Despite the importance of chemistry and chemical thought in Leibniz's philosophy, interpreters have not paid enough attention to this subject, especially in the recent decades. This work aims to contribute to filling this gap in Leibnizian studies. In this first part of the work I will expose the theory of matter that (...) the young Leibniz conceives under the influence of chemical corpuscularism. Leibniz uses R. Boyle's interpretation of the Aristotelian idea of form in order to give an explanation of the unity and cohesion of bodies. As opposed to the Cartesians, Leibniz puts forth the idea of a dependence between the variables of extension, movement and figure, without losing analytical clarity and with the aim of extending the explanatory power of physics to natural phenomena difficult to approach by Cartesian mechanics. (shrink)

In this paper, I will try to look at Leibniz from the topos of Indian philosophy. François Jullien called such a strategy “dépayser la pensée” – to withdraw an idea from its familiar environment and to see it through the lens of a different culture. “Read Confucius to better understand Plato.” I am referring to Indian philosophy, especially to some Buddhist systems, in order to highlight certain aspects of Leibniz’s mode of thinking, that I define as “atomistic approach”.

In his accounts of plant and animal generation Pierre Gassendi offers a mechanist story of how organisms create offspring to whom they pass on their traits. Development of the new organism is directed by a material “soul” or animula bearing ontogenetic information. Where reproduction is sexual, two sets of material semina and corresponding animulae meet and jointly determine the division, differentiation, and development of matter in the new organism. The determination of inherited traits requires a means of combining or choosing (...) among each parent's contributions, and towards this end, Gassendi outlines the nature of competition and dominance among animulae. Unlike his fellow mechanists, Gassendi can extend his mechanism to his heredity account, because his proposed vehicle for ontogenetic transmission is material. That proposal in turn relies on his atomist hypothesis. The relative uniformity of atoms allows animulae to operate equivalently across different modes of generation, spontaneous or otherwise. Further, his molecular model of atomic structures allows a material means of storing ontogenetic information received from the souls of parent organisms. These accounts—flawed and sketchy—unsurprisingly fail to specify how hereditary information might be borne physically, and in any case do not meet Gassendi's own empiricist standards. Yet this generation theory with pretensions to a materialist mechanism establishes Gassendi's firm commitment to a unity of the sciences through an atomist ontology that underlies all physical phenomena, including the organic. (shrink)

Is Leibnizian dynamics the New Physics sought in his youth to provide a solution to the problem of body unity/composition? This question can only be answered tentatively. The thesis that I will develop in this second part is that chemical-combinatoria project is not complete without some ideas of dynamics. The idea of form, which since the early Leibniz’s philosophy is projected to give a foundation to the corpuscular theory, only reaches this objective with the theory of conspiring movements that Leibniz (...) develops as the last phase of his dynamics. Within this general objective, this second part develops three secondary issues of importance: Leibniz’s emergent and realistic position, his theory of compounds and the interpretation of the Combinatoria or Characteristica project as a science of forms. (shrink)

What does it take for a scientific model to represent? Scientific models have received a great deal of attention in recent philosophical literature. Following Morgan and Morrison’s account of “Models as Mediators”, analysis of how models represent has changed from questioning what properties of models can be said to correlate with the world to asking how models are used to relate to an intended target-system. This turn to a practice-oriented approach of understanding models was a response to a general philosophical (...) problem that attends the empirical application of scientific representations such as models. This problem is twofold. Models, on the one hand, are often said to make false claims about the world.. (shrink)

The essays, written by both chemists and philosophers, adopt distinctive philosophical perspectives on chemistry and collectively offer both a conceptualization ...

Classical atoms—“part-less, ontologically irreducible simples” as the conference flyer puts it—are not the atoms of modern chemistry and analogies with the latter can be construed in various ways. They have figured in the historical development of concepts of chemical affinity but without, as Alan Chalmers and I have independently argued, making any significant contribution to empirically justified theories. A purely combinatorial conception of the formation of compounds by juxtaposing atoms is associated with Daltonian atomism. I review the merits of this (...) idea as a solution to problems posed by developments in early nineteenth century chemistry and go on to suggest that subsequent developments in chemistry are as much in agreement with ideas associated with Aristotle as with the ancient atomists, if not more so. The basic issues can be understood without getting involved in detailed chemistry and I hope what I have to say will be of interest to philosophers concerned with the metaphysics of matter but with no special knowledge of chemistry. (shrink)

In this paper I discuss some consequences and manifestations of a mereology of structured wholes in chemistry, with particular reference to the concept of atoms in molecules.

Conceptual atomism is a doctrine deeply rooted in the tradition of western thought. It originated with Aristotle, was present in the entire Aristotelian tradition and came to its most pure expression in the work of Leibniz. However, ab initio this doctrine suffered from certain difficulty labelled traditionally “aporia generis”, namely the problem of how it is possible to reconcile the absolute simplicity of the primitive concepts (or ultimate differentiae) with the existence of transcendental concepts, that is, concepts necessarily included in (...) every concept. In this paper the entire problem is subject to an analysis and a solution is suggested, based on a distinction between two different kinds of conceptual containment: the primitive concepts do not contain the transcendentals formally, that is, as constituents thatcan be revealed by means of definitional analysis, but they nevertheless do contain them virtually, that is, they strictly imply them. It is noted that the germ of this solution is already present in Aristotle. (shrink)

Individualism dominates Western ontologies: atoms and molecules; substances, minds, and agents. Each is said to embody conditions sufficient to establish its nature and existence. Ontologies spawned by Descartes's cogito and Kantian world‐making are, nevertheless, false to all we know of reality and ourselves. This paper suggests an alternative: entities and events are generated by the material circumstances in which they emerge and evolve; nothing at any scale is exempt from the discovery that its existence and character derive from and are (...) sustained by circumstances additional to those it embodies. All are embedded in the context that has been their source. (shrink)

As the premier early modern advocate of an Epicurean alternative to the prevailing neo-Scholastic framework of Aristotelianism, Pierre Gassendi promoted not only ancient but also innovative reasoning on behalf of atomism, probabilism, empiricism, psychological hedonism, social contractarianism, and a range of other stances associated with the philosophy of the Garden. Much commentary has focused on the extent to which Gassendi ‘baptizes’ Epicurean thought. Beyond this aspect of his Epicureanism are questions as to whether, and how, Gassendi is true to core (...) Epicurean thinking, and what he preserves and promotes as valuable to philosophical and natural investigations of his time. Indeed, much subsequent modern philosophy builds on or reacts to an Epicurean legacy bequeathed by Gassendi, comprising his adjustments to, constraints on, or corrections of, the canonical views. Yet, for all his amendments, he retains as a primary philosophical motivation the Epicurean goal of striving for ataraxia. In this, he signals his firm commitment to philosophy in the tradition of the canonical Epicurean views. And, as with Epicurus’ own notion, his account of the centrality of attaining tranquility directs us to a better understanding of our nature and that of the world around us; amenable, in Gassendi’s framework, to Christian thought and contemporary natural philosophical investigations. (shrink)

Philosophers of chemistry, following the lead of physicists, have been slow to realize that molecular descriptions issuing from quantum mechanics in the absence of chemical theory are fatally flawed. In the wake of this realization, new topics have begun to unfold—including new metaphysical issues, new concerns about the philosophy of chemistry's place in the philosophy of science, and new accounts of how properties are observed, inferred, and presented. A recent collection of essays, Of Minds and Molecules: New Philosophical Perspectives on (...) Chemistry edited by Nalini Bhushan and Stuart Rosenfeld, reveals what some of these new issues are and suggests new directions for the philosophy of chemistry. (shrink)

The problem of the reduction of chemistry to physics has been traditionally addressed in terms of classical structural chemistry and standard quantum mechanics. In this work, we will study the problem from the perspective of the Quantum Theory of Atoms in Molecules, proposed by Richard Bader in the nineties. The purpose of this article is to unveil the role of QTAIM in the inter-theoretical relations between chemistry and physics. We argue that, although the QTAIM solves two relevant obstacles to reduction (...) by providing a rigorous definition of chemical bond and of atoms in a molecule, it appeals to concepts that are unacceptable in the quantum–mechanical context. Therefore, the QTAIM fails to provide the desired reduction. On the other hand, we will show that the QTAIM is more similar to Bohmian mechanics and that the basic elements of both theories are closely related. (shrink)

By moving away from the traditional reductionist reading of the quantum theory of atoms in molecules, in this paper we analyze the role played by QTAIM in the relationship between molecular chemistry and quantum mechanics from an emergentist perspective. In particular, we show that such a relationship involves two steps: an intra-domain emergence and an inter-domain emergence. Intra-domain emergence, internal to quantum mechanics, results from the fact that the electron density, from which all the other QTAIM’s concepts are defined, arises (...) from the wavefunction as a coarse-grained magnitude. Inter-domain emergence involves an analogical link, a mapping, between QTAIM’s entities, such as topological atoms and bond paths, and the entities that populate the molecular-chemistry domain, such as chemical atoms and chemical bonds. (shrink)

Philosophers frequently cite Dalton's chemical atomism, and its nineteenth century developments, as a prime example of inference to the best explanation. This was a controversial issue in its time. But the critics are dismissed as positivist‐inspired antirealists with no interest in explanation. Is this a reasonable assessment?

In this account of the philosophical and scientific pursuits of Pierre Gassendi , I challenge a traditional view which says that the inspiration, motivation, and demonstrative grounds for his physical atomism consist not in his empiricism but in his historicist commitments. Indeed, Gassendi suggests that it's a consequence of our best theory of knowledge and sound scientific method that we get evidence which warrants his microphysical theory. ;The primary novelty of his theory of empirical knowledge is his proposal, against the (...) Stoics and Descartes, that it is not a necessary condition of our knowing some claim that we are certain of it. This move immediately broadens the scope of what we can know through the senses, as does his suggestion that we include among such knowledge claims those assertions about what is hidden to the senses which we legitimately infer from the evidence of the perceptually given. ;On the basis of these epistemological positions, Gassendi develops his views on scientific method according to which we attain and justify our best empirical claims by deduction yet, he believes, these claims are at root probabilistic, and we may maintain hypotheses as the basis of our scientific reasoning so long as there is some empirical evidence for them, however broadly construed. ;Hence Gassendi suggests that his atomism constitutes a 'most likely hypothesis' for which we have empirical evidence--which of necessity is found indirectly in 'indicative' signs, those surface level phenomena for which he takes the existence of atoms to be a sine qua non condition. Perhaps the paramount case of such evidence consists in those microscopic observations of crystalline formation and dissolution that he takes to demonstrate the molecular structure of matter--a key and innovative consequence of his atomism. ;The robust character of Gassendi's method emerges in his appeals to indirect evidence for claims about the unobservable and his willingness to count this as adequate empirical grounds for maintaining an atomist hypothesis. Remarkably, he stands at the dawn of the modern era with at least a proposal as to how to resolve one of empiricism's more vexing difficulties, still with us in some form today. (shrink)

The appearance of these two books marks an important step in the arrival of the philosophy of chemistry in the philosophical imagination. Long the missing tooth between the philosophy of physics and the philosophy of biology, the philosophy of chemistry has come into its own only in the last decade. After numerous symposia and conferences, special issues and articles, and even the appearance of two journals devoted specifically to philosophical issues raised by chemistry, the field has lacked the visibility that (...) a book provides. Now there are two—one an anthology and the other a monograph—that both in their own ways help to set the field on firmer footing. (shrink)