What is the contribution of Duhem’s work to the modern historiography? His interpreters have been discussing this question and ordinarily have recognized that the main aspect in his extensive work is connected with his research of medieval science. It has become customary to speak of the “discovery of medieval science” as his foremost historiographic achievement. This paper aims to discuss some aspects of Duhem’s historiography more for its promotion of a new historical perspective than for its results. Duhem’s legacy for (...) modern historiography can be investigated from the characteristics that mark this new perspective, as regarded by Thomas Kuhn. (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)

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)

In trying to understand why a chemist thought as he did, and drew one set of conclusions rather than another, probably the most important thing we need to know is what picture he had in mind of the way in which chemical reactions take place. There are, of course, many other things we need to know. For example, we need to know his social, economic and cultural circumstances, how he was educated and his ideas of the social function of science (...) and in particular of chemistry; we need to know what scientific societies and institutions he belonged to and how they influenced him; and we need to know what he hoped to get out of his work in chemistry—fame or a living or personal satisfaction or a combination of two or three of those results. Indeed, it has become fashionable in recent years to consider those aspects rather than the nature of his actual chemical thought. Yet in the end, his mental picture of chemical change is surely the most important factor in determining what the chemist's results will be, and is therefore the most important factor for historians to understand. (shrink)

A lo largo de estas páginas abordaré: a) qué significa para Spinoza entender o conocer el “verdadero bien”; b) las condiciones internas necesarias para alcanzar dicha comprensión y c) el método que hay que seguir. Después me centraré en analizar las condiciones externas para lograrlo, que se subdividen en dos: a) la necesidad de que lo alcance el mayor número de personas y b) la existencia de determinadas condiciones políticas y religiosas que detallaré.

E.F. Geoffroy's table of different relations ( rapports ) between different chemical substances is mainly based on empirical knowledge accumulated in 16th and 17th century metallurgy and pharmacy. The substances listed in the left half of the table were basic for the formation of salts which were produced for medical ends in the chemical-pharmaceutical practice of the 17th century. The right half of the table refers to substances and operations of metallurgy which had already been described in the metallurgical writings (...) of the 16th century. Even Geoffroy's ordering of the substances within the columns of his table has its origin in metallurgical and pharmaceutical practice. The key concept of the conceptual framework underlying the table and its commentary is the concept of chemical compound which emerged at the end of the 17th century. Geoffroy extends the range of application of this concept, which was first limited to chemical artefacts, to include natural bodies. Eliminating the peripatetical distinction between natural bodies and chemical artefacts he formulates a new research program, consisting in the determination of the laws of the relations ( rapports ) between different chemical substances. (shrink)