Can theories of mental imagery, conscious mental contents, developed within cognitive science throw light on the obscure (but culturally very significant) concept of imagination? Three extant views of mental imagery are considered: quasi‐pictorial, description, and perceptual activity theories. The first two face serious theoretical and empirical difficulties. The third is (for historically contingent reasons) little known, theoretically underdeveloped, and empirically untried, but has real explanatory potential. It rejects the “traditional” symbolic computational view of mental contents, but is compatible with recentsituated (...) cognition and active visionapproaches in robotics. This theory is developed and elucidated. Three related key aspects of imagination (non‐discursiveness, creativity, and seeing as) raise difficulties for the other theories. Perceptual activity theory presents imagery as non‐discursive and relates it closely to seeing as. It is thus well placed to be the basis for a general theory of imagination and its role in creative thought. (shrink)

I will trace the little known prehistory and parts of the better known history of CO2 by investigating some of the names it has been given from Antiquity to the present day. In Antiquity, the words pneuma or spiritus letalis designated both a supernatural force and an exhalation that emanated from certain caves. We will see how CO2 gradually came to be regarded as something natural, a gas and then substance.

During the last decades, medical historiography has undergone considerable changes. This review attempts an outline of the developments since 1945. The first section sketches the institutional background of the discipline focusing on the characteristic features which emerged in different national traditions. The following sections—essentially restricted to the German speaking context—describe the development of the fields in research and teaching, ranging from the history of ideas to the social history of medicine, from philogical and editorial work to the philosophy and sociology (...) of medical knowledge. (shrink)

The ArgumentThe overall portrayal of early modern experimentation as a new method of securing assent within a philosophical discourse sketched in many of the recent studies on the historical origin of experimentation is questioned by the analysis of the experimental practice of chemistry at the Paris Academy. Chemical experimentation at the Paris Academy in the late seventeenth and early eighteenth century originated in a different tradition than the philosophical. It continued and developed the material culture of the chemical work shops (...) of the sixteenth and seventeenth centuries, and explored epistemic objects which had rather loose connections to philosophy. On the other hand, I argue against the classical dichotomy between the work of the mind that of the hand, and for an epistemology of experimentation that acknowledges that experimental manipulation goes hand in hand with reflexion. In particuler, I argue against the view that chemists at the Paris Academy were “pragmatists” who merely gathered experimental facts and classified substances and operations without perplexing themselves over general conceptions. I claim that the chemists at the Paris Academy constructed a general conception framework which shaped the significance of their experiments. This conception that I call conception of the chemical combination, compound and reaction was rather quickly reified into an experimental fact. Despite its generality it was a genuine chemical conception rather independent of philosophy. (shrink)

The ArgumentMost historians of science share the conviction that the incorporation of the corpuscular theory into seventeenth-century chemistry was the beginning of modern chemistry. My thesis in this paper is that modern chemisty started with the concept of the chemicl compound, which emerged at the end of the seventeenth and the beginning of the eighteenth century, without any signifivant influence of the corpuscular theory. Rather the historical reconstruction of the emergence of this concept shows that it resulted from the reflection (...) on the chemical operations in the sixteenth-century metallurgy and seventeenth-century pharmacy. I argue that the reversibility of these operations and their understanding as crafts (metallurgy) or chemical arts (pharmacy) were decisive factors for the emergence of the first ideas about chemical compounds in the seventeenth-century pharmaceutical works written by pharmaceutically trained authors, influenced by the Paracelsian image of nature. There is a direct line of descent from these authors to E.F.Geoffroy (1675–1742), who integrated the first scattered ideas of chemical compound into a general concept comprising chemical artefacts as well as natural bodies. (shrink)

In the early eighteenth century, chemistry became the main academic locus where, in Francis Bacon's words, Experimenta lucifera were performed alongside Experimenta fructifera and where natural philosophy was coupled with natural history and 'experimental history' in the Baconian and Boyleian sense of an inventory and exploration of the extant operations of the arts and crafts. The Dutch social and political system and the institutional setting of the university of Leiden endorsed this empiricist, utilitarian orientation toward the sciences, which was forcefully (...) propagated by one of the university's most famous representatives in the first half of the eighteenth century, the professor of medicine, botany and chemistry Herman Boerhaave. Recent historical investigations on Boerhaave's chemistry have provided important insights into Boerhaave's religious background, his theoretical and philosophical goals, and his pedagogical agenda. But comparatively little attention has been paid to the chemical experiments presented in Boerhaave's famous chemical textbook, the Elementa chemiae, and to the question of how these experiments relate not only to experimental philosophy but also to experimental history and natural history, and to contemporary utilitarianism. I argue in this essay that Boerhaave shared a strong commitment to Baconian utilitarianism and empiricism with many other European chemists around the middle of the eighteenth century, in particular to what Bacon designated 'experimental history' and I will provide evidence for this claim through a careful analysis of Boerhaave's plant-chemical experiments presented in the Elementa chemiae. (shrink)

This paper offers a preliminary enquiry into a largely neglected topic: the concept of time in the post-medieval, pre-Newtonian era. Although Aristotle's theory of time was predominant in the sixteenth and early seventeenth centuries, it was, in this period, subjected to the most serious attack since that by the ancient Neoplatonists. In particular, in the work of Bernadino Telesio, Giordano Bruno and Francesco Patrizi we have concerted attempts to reconsider Aristotle's definition of time. Although the approach of each is different, (...) all three endeavour to dissociate time from movement and to conceive it as part of an independent duration. They were probably inspired by Neoplatonism, and they offer important antecedents to Newton's theory of absolute time. (shrink)

In the present article, we discuss the specificity of the object of the history of science as an autonomous and interdisciplinary field of studies by nature and origin, placed at the interface of history, epistemology and science, and focus on some key historiographical views. Within this context, Georges Canguilhem stands out for contributions such as calling the attention to the relevance of epistemology in science history research and the discontinuity-continuity antithesis, among many others. An accurate understanding of Canguilhem’s ideas demands (...) an unbiased review of Auguste Comte’s work, particularly his views on science in general, the various sciences in particular and the methods to present them, to wit, the historical and the dogmatic. We finish with a short description of our theoretical-methodological work and its implications for studies in the history of science. (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)

Humoralism, the view that the human body is composed of a limited number of elementary fluids, is one of the most characteristic aspects of ancient medicine. The psychological dimension of humoral theory in the ancient world has thus far received a relatively small amount of scholarly attention. Medical psychology in the ancient world can only be correctly understood by relating it to psychological thought in other fields, such as ethics and rhetoric. The concept that ties these various domains together is (...) character (êthos), which involves a view of human beings focused on clearly distinguishable psychological types that can be recognized on the basis of external signs. Psychological ideas based on humoral theory remained influential well into the early modern period. Yet, in 17th-century medicine and philosophy, humoral physiology and psychology started to lose ground to other theoretical perspectives on the mind and its relation to the body. This decline of humoralist medical psychology can be related to a broader reorientation of psychological thought in which the traditional concept of character lost its central position. Instead of the focus on types and stable character traits, a perspective emerged that was primarily concerned with individuality and transient passions. (shrink)